Hong Meng, PhD, is a Professor at the School of Advanced Materials, Peking University Shenzhen Graduate School, with over 30 years of experience in organic electronics. Previously at Bell Labs and DuPont Experimental Station, he has contributed over 230 peer-reviewed papers, filed over 46 US patents and 140 Chinese patents, and is recognized as a key inventor of deuterated blue host materials that addressed the persistent challenge of blue OLED operational lifetime.

• Volume IChapter 1. Introduction to Organic Light-Emitting Diodes 11.1. Introduction 11.2. OLED Device Structure and Light Emission Mechanism 71.3. OLED Materials 181.4. OLED Technology and Marketization 311.5. Future Outlook of OLED Technology 401.6. Conclusions 46References 47Chapter 2. Fundamental Concepts of Organic Light-Emitting Diodes 22.1. Key OLED Device Parameters 32.2. Factors Affecting OLED Device Aging 282.3. Strategies for Improving OLED Device Performance 342.3. Conclusion 55Reference 56Chapter 3. Anode Materials for Organic Light-Emitting Diodes 23.1. Introduction 23.2. Anode Materials 43.3. Energy Level Alignment Theory 163.4. Energy Level Alignment Measurements 243.5. Summary 26References 27Chapter 4. Hole Injection Materials for Organic Light-Emitting Diodes14.1. Introduction 14.2. Basic Requirements and Energy Level Considerations for Hole Injection Materials 34.3. Common Hole Injection Materials 74.4. Commercialized HIMs 314.5. Conclusion and Outlook 32References 34Chapter 5. Hole Transport Materials for OLEDs 25.1. Introduction 25.2. Working principle of HTMs 45.3. Performance Requirements for HTMs 75.4. Progress in HTMs 175.5. HTMs in Patents 755.6. Technology Roadmap for HTMs 825.7. Summary and Prospects 845.8. References 84Chapter 6. Carrier blocking layer materials for OLEDs 26.1. Introduction 26.2. The Role of Carrier Blocking Material 46.3. Hole Blocking Material 86.4 Electron blocking material 346.5 Conclusions and Outlook 52Reference 54Chapter 7 Fluorescent OLED material 27.1. Introduction 37.2. Blue Fluorescent OLED Materials 67.3. Red Fluorescent OLED Materials 427.4. Green Fluorescent OLED Materials 707.5 Summary 84Reference 86Chapter 8 Phosphorescent OLED materials 38.1. Introduction of Phosphorescent Materials 38.2. Green Phosphorescent Materials 178.3. Red Phosphorescent Materials 378.4. Blue Phosphorescent Materials 588.5. Near-Infrared Phosphorescent Materials 838.6. Summary 116Reference 118Chapter 9 Pt-Pd Phosphorescent Materials 29.1 Introduction to Pt-Pd Phosphorescent Materials 29.2 Development and Classification of Pt-Pd Phosphorescent Materials 79.3 Synthetic Examples of Phosphorescent Pt-Pd Complexes 399.4 Summary and Outlook 41Reference. 43Volume IIChapter 1: Fundamentals of TADF 41.1. Introduction to TADF Materials 4​​1.2. Photophysics and Mechanisms of TADF​ 13​​​​​Chapter 2: Molecular Design I: Donor–Acceptor Architectures 382.1. Twisted Donor-Acceptor (TDA) Molecular Geometries 392.2. TADF through-bond Charge Transfer (TBCT) 632.3. TADF Molecules Through Space Charge Transfer (TSCT) 64Chapter 3: Molecular Design II: Multi-Resonance (MR-TADF) 693.1. Classification of MR-TADF Emitters 723.2. Synthesis of MR-TADF Emitters 743.3. Modulation and Construction of MR-TADF Emitters 793.4. MR-TADF with Circularly Polyarized Emission 863.5. Future Directions​ of MR-TADF 100Chapter 4: Molecular Design III: Metal-Complex TADF 1024.1. Cu(I) Complexes TADF 1034.2. Au(III) TADF Emitters 1264.3. Ag(I) TADF Emitters 1374.4. Pt(II) Complex TADF Materials 1384.5. Pd(II) Complex TADF Materials 1414.6. Zn(II) Complex TADF Materials 1424.7. Sn(II) Complex TADF Materials 1444.8. Al(III) Complex TADF Materials 1454.9. Comparation of Different Type of TADF Materials 1474.10. Determining Emission Nature of the Metal Complex 1474.11. Conclusion and Perspective of TADF Metal Complex 148Chapter 5: Macromolecular TADF: Dendrimers & Polymers 1515.1. TADF Dendritic Macromolecule 1515.2. Polymer TADF Materials​ 164Chapter 6: TADF as Host Materials: Design & Applications 1846.1. Introduction to TADF Hosts​ 1846.2. TADF High Triplet Energy Hosts for Exciton Confinement 1846.3. TADF Hosts with Phosphorescent Emitters ​1866.4. TADF Hosts with Fluorescent Emitters ​1886.5. TADF Hosts with TADF Emitters ​1906.6. TADF Exciplex Hosts ​1926.7. MR-TADF Hosts​ 1936.8. Bifunctional Hosts with TADF Properties​ 1966.9. Pure Hydrocarbon Hosts for MR-TADF 1986.10. Deuterium TADF Hosts 2016.11. Summary of TADF Hosts 203Chapter 7: Organic TADF Emitters by Color 2047.1. Blue TADF emitters 2047.2. Green TADF emitters 2077.3. Red TADF emitters 2117.4. Organic Near-infrared-TADF materials 2157.5. TADF White light Emitters 218Chapter 8: MR-TADF Emitters: Strategies & Breakthroughs 2378.1. Blue MR-TADF Emitters 2388.2. Green MR-TADF Emitters 2418.3. Red and Infrared MR-TADF Emitters 2448.4. Infrared MR-TADF Emitters. 2478.5. Heavy-Atom Enhanced MR-TADF 249Chapter 9: Advanced Applications 2559.1. TADF-sensitized Hyperfluorescence Systems ​ 255​​9.2. Phosphorescent-sensitized Hyperphosphorescent OLEDs ​ 2779.3. Machine Learning and AI+OLED Materials Design ​ 2939.3.6. Machine Learning for OLED Materials: Challenges & Future Directions. 306Volume IIChapter 1 Fundamentals of TADF 41.1. Introduction to TADF Materials 4​​1.2. Photophysics and Mechanisms of TADF​ 13Chapter 2 Molecular Design I: Donor–Acceptor Architectures. 382.1. Twisted Donor-Acceptor (TDA) Molecular Geometries. 392.2. TADF through-bond Charge Transfer (TBCT) 632.3. TADF Molecules Through Space Charge Transfer (TSCT) 64Chapter 3 Molecular Design II: Multi-Resonance (MR-TADF) 693.1. Classification of MR-TADF Emitters 723.2. Synthesis of MR-TADF Emitters 743.3. Modulation and Construction of MR-TADF Emitters 793.4. MR-TADF with Circularly Polyarized Emission 863.5. Future Directions​ of MR-TADF 100Chapter 4 Molecular Design III: Metal-Complex TADF 1024.1. Cu(I) Complexes TADF 1034.2. Au(III) TADF Emitters.1264.3. Ag(I) TADF Emitters 1374.4. Pt(II) Complex TADF Materials 1384.5. Pd(II) Complex TADF Materials 1414.6. Zn(II) Complex TADF Materials 1424.7. Sn(II) Complex TADF Materials 1444.8. Al(III) Complex TADF Materials 1454.9. Comparation of Different Type of TADF Materials 1474.10. Determining Emission Nature of the Metal Complex 1474.11. Conclusion and Perspective of TADF Metal Complex 148Chapter 5 Macromolecular TADF: Dendrimers & Polymers 1515.1. TADF Dendritic Macromolecule 1515.2. Polymer TADF Materials​ 164Chapter 6 TADF as Host Materials: Design & Applications 1846.1. Introduction to TADF Hosts​ 1846.2. TADF High Triplet Energy Hosts for Exciton Confinement 1846.3. TADF Hosts with Phosphorescent Emitters ​1866.4. TADF Hosts with Fluorescent Emitters ​1886.5. TADF Hosts with TADF Emitters ​1906.6. TADF Exciplex Hosts ​1926.7. MR-TADF Hosts​ 1936.8. Bifunctional Hosts with TADF Properties​ 1966.9. Pure Hydrocarbon Hosts for MR-TADF 1986.10. Deuterium TADF Hosts 2016.11. Summary of TADF Hosts 203Chapter 7 Organic TADF Emitters by Color 2047.1. Blue TADF emitters 2047.2. Green TADF emitters 2077.3. Red TADF emitters 2117.4. Organic Near-infrared-TADF materials 2157.5. TADF White light Emitters. 218Chapter 8 MR-TADF Emitters: Strategies & Breakthroughs 2378.1. Blue MR-TADF Emitters 2388.2. Green MR-TADF Emitters 2418.3. Red and Infrared MR-TADF Emitters 2448.4. Infrared MR-TADF Emitters 2478.5. Heavy-Atom Enhanced MR-TADF 249Chapter 9 Advanced Applications 2559.1. TADF-sensitized Hyperfluorescence Systems ​2559.2. Phosphorescent-sensitized Hyperphosphorescent OLEDs ​2779.3. Machine Learning and AI+OLED Materials Design ​293Chapter 10 Challenges, Commercialization & Outlook 30810.1. Stability: The Degradation Mechanism of MR-TADF Blue Materials​ 30810.2. Tackling Efficiency Roll-off in Blue TADF OLEDs​ 31010.3. Commercialization Pathways​​ 31210.4. Outlook of TADF OLED Materials​​ 312REFERENCE 329Volume IIIChapter 11 Host Materials 211.1. Introduction to Host Materials 211.2. Classification of Host Materials 1611.3. Commercial Host Materials 7511.4. Conclusion and Outlook 90Reference 91Chapter 12 OLED Materials and Devices Based on AIE Characteristics 212.1. AIE Concept 212.2. Fundamental Principles of AIE 312.3. Development History. 812.4. Classification of AIE Fluorescent Materials 1112.5. AIE-Based OLED Materials and Devices 1512.6. Conclusions and Future Perspectives 28Reference  29Chapter 13 Electron Transport Materials 213.1. Introduction 213.2. Performance Requirements for ETMs 213.3. Categories of Organic Electron Transport Materials 1213.4. Modification Strategies for Electron Transport Materials 4413.5. Summary and Outlook 50Reference 52Chapter 14 Electron Injection Materials 114.1 Introduction 214.2 Energy Level Structure 314.3 Common Electron Injection Materials 414.4 Summary and Outlook 25Reference 28Chapter 15 Cathode Materials 215.1 Introduction. 215.2 Elemental Metals 315.3 Alloy Materials 415.4 Multi-layer Metal Structure 615.5 Metal Compounds 715.6 Composite Materials and Interface Engineering 1115.7 Top Emitting Device Cathode 1315.8 Summary. 16References 17Chapter 16 OLED coupling Layer iCP 216.1 Introduction 216.2 External Light Extraction Techniques (ELE) 416.3 Internal Light Extraction Techniques (ILE) 1216.4 Light Extraction Layer Materials 2216.5 Summary 4016.6 Reference 41Chapter 17 White Organic Electroluminescent Devices 317.1 Introduction 317.2 WOLED Device Classification 617.3 Overview of WOLED Efficiency Developments 717.4 Pure Phosphorescent, Sensitized Phosphorescent, and Doped WOLEDs 917.5 Specialty White Light Devices WOLEDs 1717.6 Strategies to Enhance the Operating Performance of WOLEDs 2017.7 Color Purity of WOLEDs (Color of WOLEDs) 3217.8 WOLEDs with different device structures 4917.9 WOLEDs in Lighting and Displays 71Chapter 18 High-Efficiency Solution-Processed OLED Materials and Devices 3Preface. 318.1 Classification of Solution-Processed OLED Materials and Devices. 418.2 OLED Device Fabrication Processes by Solution Methods. 618.3 Solution-Processed Hole Injection and Transport Materials HIM/HTM 1818.4 Solution-Processed EIM and ETM Materials 2918.5 Solution-Processed Host and Emitting Materials 3318.6 Solution-Processed Charge-generation Layer CGL and Tandem OLED Devices 4118.7 Development of Solution-Processed OLED in Industry 4418.8 Conclusion and Outlook 4718.9 References 49Chapter 19 Purification of OLED materials 119.1 Introduction 119.2 The influence of purity on device performance 219.3 Material purification method 319.4 Conclusion and Prospect 19Reference. 19Volume IVChapter 20 Preparation of Deuterated OLED Materials 220.1 Introduction 220.2 Lifetime enhancement of deuterated OLED materials 320.3 Synthesis and Process of Deuterated Compounds 1720.4 Synthesis of Deuterated OLED Materials 2920.5 Summary and Prospect of Deuterated OLED Materials 32Reference. 33Chapter 21 Enhancing OLED Device Performance through Molecular Orientation 221.1 Introduction 221.2 Impact of Molecularly Oriented HTMs on Device Performance 11Reference 28Chapter 22 OLED Lifetime and Aging 222.1 OLED Lifetime and Related Concepts 222.2 Factors Influencing OLED Aging 522.3 Strategies to Enhance OLED Lifetime. 622.4 Summary and Outlook. 1322.5 Reference. 15Chapter 24 OLED Material Calculations 224.1 Overview of OLED Material Simulation and Background 224.2 Material calculations and analysis at the molecular level 924.3 Computational Simulation at the Forefront of OLED Material Design 1924.4 Summary and Outlook 33References 35

Hong Meng, PhD, is a Professor at the School of Advanced Materials, Peking University Shenzhen Graduate School, with over 30 years of experience in organic electronics. Previously at Bell Labs and DuPont Experimental Station, he has contributed over 230 peer-reviewed papers, filed over 46 US patents and 140 Chinese patents, and is recognized as a key inventor of deuterated blue host materials that addressed the persistent challenge of blue OLED operational lifetime.

• Volume IChapter 1. Introduction to Organic Light-Emitting Diodes 11.1. Introduction 11.2. OLED Device Structure and Light Emission Mechanism 71.3. OLED Materials 181.4. OLED Technology and Marketization 311.5. Future Outlook of OLED Technology 401.6. Conclusions 46References 47Chapter 2. Fundamental Concepts of Organic Light-Emitting Diodes 22.1. Key OLED Device Parameters 32.2. Factors Affecting OLED Device Aging 282.3. Strategies for Improving OLED Device Performance 342.3. Conclusion 55Reference 56Chapter 3. Anode Materials for Organic Light-Emitting Diodes 23.1. Introduction 23.2. Anode Materials 43.3. Energy Level Alignment Theory 163.4. Energy Level Alignment Measurements 243.5. Summary 26References 27Chapter 4. Hole Injection Materials for Organic Light-Emitting Diodes14.1. Introduction 14.2. Basic Requirements and Energy Level Considerations for Hole Injection Materials 34.3. Common Hole Injection Materials 74.4. Commercialized HIMs 314.5. Conclusion and Outlook 32References 34Chapter 5. Hole Transport Materials for OLEDs 25.1. Introduction 25.2. Working principle of HTMs 45.3. Performance Requirements for HTMs 75.4. Progress in HTMs 175.5. HTMs in Patents 755.6. Technology Roadmap for HTMs 825.7. Summary and Prospects 845.8. References 84Chapter 6. Carrier blocking layer materials for OLEDs 26.1. Introduction 26.2. The Role of Carrier Blocking Material 46.3. Hole Blocking Material 86.4 Electron blocking material 346.5 Conclusions and Outlook 52Reference 54Chapter 7 Fluorescent OLED material 27.1. Introduction 37.2. Blue Fluorescent OLED Materials 67.3. Red Fluorescent OLED Materials 427.4. Green Fluorescent OLED Materials 707.5 Summary 84Reference 86Chapter 8 Phosphorescent OLED materials 38.1. Introduction of Phosphorescent Materials 38.2. Green Phosphorescent Materials 178.3. Red Phosphorescent Materials 378.4. Blue Phosphorescent Materials 588.5. Near-Infrared Phosphorescent Materials 838.6. Summary 116Reference 118Chapter 9 Pt-Pd Phosphorescent Materials 29.1 Introduction to Pt-Pd Phosphorescent Materials 29.2 Development and Classification of Pt-Pd Phosphorescent Materials 79.3 Synthetic Examples of Phosphorescent Pt-Pd Complexes 399.4 Summary and Outlook 41Reference. 43Volume IIChapter 1: Fundamentals of TADF 41.1. Introduction to TADF Materials 4​​1.2. Photophysics and Mechanisms of TADF​ 13​​​​​Chapter 2: Molecular Design I: Donor–Acceptor Architectures 382.1. Twisted Donor-Acceptor (TDA) Molecular Geometries 392.2. TADF through-bond Charge Transfer (TBCT) 632.3. TADF Molecules Through Space Charge Transfer (TSCT) 64Chapter 3: Molecular Design II: Multi-Resonance (MR-TADF) 693.1. Classification of MR-TADF Emitters 723.2. Synthesis of MR-TADF Emitters 743.3. Modulation and Construction of MR-TADF Emitters 793.4. MR-TADF with Circularly Polyarized Emission 863.5. Future Directions​ of MR-TADF 100Chapter 4: Molecular Design III: Metal-Complex TADF 1024.1. Cu(I) Complexes TADF 1034.2. Au(III) TADF Emitters 1264.3. Ag(I) TADF Emitters 1374.4. Pt(II) Complex TADF Materials 1384.5. Pd(II) Complex TADF Materials 1414.6. Zn(II) Complex TADF Materials 1424.7. Sn(II) Complex TADF Materials 1444.8. Al(III) Complex TADF Materials 1454.9. Comparation of Different Type of TADF Materials 1474.10. Determining Emission Nature of the Metal Complex 1474.11. Conclusion and Perspective of TADF Metal Complex 148Chapter 5: Macromolecular TADF: Dendrimers & Polymers 1515.1. TADF Dendritic Macromolecule 1515.2. Polymer TADF Materials​ 164Chapter 6: TADF as Host Materials: Design & Applications 1846.1. Introduction to TADF Hosts​ 1846.2. TADF High Triplet Energy Hosts for Exciton Confinement 1846.3. TADF Hosts with Phosphorescent Emitters ​1866.4. TADF Hosts with Fluorescent Emitters ​1886.5. TADF Hosts with TADF Emitters ​1906.6. TADF Exciplex Hosts ​1926.7. MR-TADF Hosts​ 1936.8. Bifunctional Hosts with TADF Properties​ 1966.9. Pure Hydrocarbon Hosts for MR-TADF 1986.10. Deuterium TADF Hosts 2016.11. Summary of TADF Hosts 203Chapter 7: Organic TADF Emitters by Color 2047.1. Blue TADF emitters 2047.2. Green TADF emitters 2077.3. Red TADF emitters 2117.4. Organic Near-infrared-TADF materials 2157.5. TADF White light Emitters 218Chapter 8: MR-TADF Emitters: Strategies & Breakthroughs 2378.1. Blue MR-TADF Emitters 2388.2. Green MR-TADF Emitters 2418.3. Red and Infrared MR-TADF Emitters 2448.4. Infrared MR-TADF Emitters. 2478.5. Heavy-Atom Enhanced MR-TADF 249Chapter 9: Advanced Applications 2559.1. TADF-sensitized Hyperfluorescence Systems ​ 255​​9.2. Phosphorescent-sensitized Hyperphosphorescent OLEDs ​ 2779.3. Machine Learning and AI+OLED Materials Design ​ 2939.3.6. Machine Learning for OLED Materials: Challenges & Future Directions. 306Volume IIChapter 1 Fundamentals of TADF 41.1. Introduction to TADF Materials 4​​1.2. Photophysics and Mechanisms of TADF​ 13Chapter 2 Molecular Design I: Donor–Acceptor Architectures. 382.1. Twisted Donor-Acceptor (TDA) Molecular Geometries. 392.2. TADF through-bond Charge Transfer (TBCT) 632.3. TADF Molecules Through Space Charge Transfer (TSCT) 64Chapter 3 Molecular Design II: Multi-Resonance (MR-TADF) 693.1. Classification of MR-TADF Emitters 723.2. Synthesis of MR-TADF Emitters 743.3. Modulation and Construction of MR-TADF Emitters 793.4. MR-TADF with Circularly Polyarized Emission 863.5. Future Directions​ of MR-TADF 100Chapter 4 Molecular Design III: Metal-Complex TADF 1024.1. Cu(I) Complexes TADF 1034.2. Au(III) TADF Emitters.1264.3. Ag(I) TADF Emitters 1374.4. Pt(II) Complex TADF Materials 1384.5. Pd(II) Complex TADF Materials 1414.6. Zn(II) Complex TADF Materials 1424.7. Sn(II) Complex TADF Materials 1444.8. Al(III) Complex TADF Materials 1454.9. Comparation of Different Type of TADF Materials 1474.10. Determining Emission Nature of the Metal Complex 1474.11. Conclusion and Perspective of TADF Metal Complex 148Chapter 5 Macromolecular TADF: Dendrimers & Polymers 1515.1. TADF Dendritic Macromolecule 1515.2. Polymer TADF Materials​ 164Chapter 6 TADF as Host Materials: Design & Applications 1846.1. Introduction to TADF Hosts​ 1846.2. TADF High Triplet Energy Hosts for Exciton Confinement 1846.3. TADF Hosts with Phosphorescent Emitters ​1866.4. TADF Hosts with Fluorescent Emitters ​1886.5. TADF Hosts with TADF Emitters ​1906.6. TADF Exciplex Hosts ​1926.7. MR-TADF Hosts​ 1936.8. Bifunctional Hosts with TADF Properties​ 1966.9. Pure Hydrocarbon Hosts for MR-TADF 1986.10. Deuterium TADF Hosts 2016.11. Summary of TADF Hosts 203Chapter 7 Organic TADF Emitters by Color 2047.1. Blue TADF emitters 2047.2. Green TADF emitters 2077.3. Red TADF emitters 2117.4. Organic Near-infrared-TADF materials 2157.5. TADF White light Emitters. 218Chapter 8 MR-TADF Emitters: Strategies & Breakthroughs 2378.1. Blue MR-TADF Emitters 2388.2. Green MR-TADF Emitters 2418.3. Red and Infrared MR-TADF Emitters 2448.4. Infrared MR-TADF Emitters 2478.5. Heavy-Atom Enhanced MR-TADF 249Chapter 9 Advanced Applications 2559.1. TADF-sensitized Hyperfluorescence Systems ​2559.2. Phosphorescent-sensitized Hyperphosphorescent OLEDs ​2779.3. Machine Learning and AI+OLED Materials Design ​293Chapter 10 Challenges, Commercialization & Outlook 30810.1. Stability: The Degradation Mechanism of MR-TADF Blue Materials​ 30810.2. Tackling Efficiency Roll-off in Blue TADF OLEDs​ 31010.3. Commercialization Pathways​​ 31210.4. Outlook of TADF OLED Materials​​ 312REFERENCE 329Volume IIIChapter 11 Host Materials 211.1. Introduction to Host Materials 211.2. Classification of Host Materials 1611.3. Commercial Host Materials 7511.4. Conclusion and Outlook 90Reference 91Chapter 12 OLED Materials and Devices Based on AIE Characteristics 212.1. AIE Concept 212.2. Fundamental Principles of AIE 312.3. Development History. 812.4. Classification of AIE Fluorescent Materials 1112.5. AIE-Based OLED Materials and Devices 1512.6. Conclusions and Future Perspectives 28Reference  29Chapter 13 Electron Transport Materials 213.1. Introduction 213.2. Performance Requirements for ETMs 213.3. Categories of Organic Electron Transport Materials 1213.4. Modification Strategies for Electron Transport Materials 4413.5. Summary and Outlook 50Reference 52Chapter 14 Electron Injection Materials 114.1 Introduction 214.2 Energy Level Structure 314.3 Common Electron Injection Materials 414.4 Summary and Outlook 25Reference 28Chapter 15 Cathode Materials 215.1 Introduction. 215.2 Elemental Metals 315.3 Alloy Materials 415.4 Multi-layer Metal Structure 615.5 Metal Compounds 715.6 Composite Materials and Interface Engineering 1115.7 Top Emitting Device Cathode 1315.8 Summary. 16References 17Chapter 16 OLED coupling Layer iCP 216.1 Introduction 216.2 External Light Extraction Techniques (ELE) 416.3 Internal Light Extraction Techniques (ILE) 1216.4 Light Extraction Layer Materials 2216.5 Summary 4016.6 Reference 41Chapter 17 White Organic Electroluminescent Devices 317.1 Introduction 317.2 WOLED Device Classification 617.3 Overview of WOLED Efficiency Developments 717.4 Pure Phosphorescent, Sensitized Phosphorescent, and Doped WOLEDs 917.5 Specialty White Light Devices WOLEDs 1717.6 Strategies to Enhance the Operating Performance of WOLEDs 2017.7 Color Purity of WOLEDs (Color of WOLEDs) 3217.8 WOLEDs with different device structures 4917.9 WOLEDs in Lighting and Displays 71Chapter 18 High-Efficiency Solution-Processed OLED Materials and Devices 3Preface. 318.1 Classification of Solution-Processed OLED Materials and Devices. 418.2 OLED Device Fabrication Processes by Solution Methods. 618.3 Solution-Processed Hole Injection and Transport Materials HIM/HTM 1818.4 Solution-Processed EIM and ETM Materials 2918.5 Solution-Processed Host and Emitting Materials 3318.6 Solution-Processed Charge-generation Layer CGL and Tandem OLED Devices 4118.7 Development of Solution-Processed OLED in Industry 4418.8 Conclusion and Outlook 4718.9 References 49Chapter 19 Purification of OLED materials 119.1 Introduction 119.2 The influence of purity on device performance 219.3 Material purification method 319.4 Conclusion and Prospect 19Reference. 19Volume IVChapter 20 Preparation of Deuterated OLED Materials 220.1 Introduction 220.2 Lifetime enhancement of deuterated OLED materials 320.3 Synthesis and Process of Deuterated Compounds 1720.4 Synthesis of Deuterated OLED Materials 2920.5 Summary and Prospect of Deuterated OLED Materials 32Reference. 33Chapter 21 Enhancing OLED Device Performance through Molecular Orientation 221.1 Introduction 221.2 Impact of Molecularly Oriented HTMs on Device Performance 11Reference 28Chapter 22 OLED Lifetime and Aging 222.1 OLED Lifetime and Related Concepts 222.2 Factors Influencing OLED Aging 522.3 Strategies to Enhance OLED Lifetime. 622.4 Summary and Outlook. 1322.5 Reference. 15Chapter 24 OLED Material Calculations 224.1 Overview of OLED Material Simulation and Background 224.2 Material calculations and analysis at the molecular level 924.3 Computational Simulation at the Forefront of OLED Material Design 1924.4 Summary and Outlook 33References 35

Hong Meng, PhD, is a Professor at the School of Advanced Materials, Peking University Shenzhen Graduate School, with over 30 years of experience in organic electronics. Previously at Bell Labs and DuPont Experimental Station, he has contributed over 230 peer-reviewed papers, filed over 46 US patents and 140 Chinese patents, and is recognized as a key inventor of deuterated blue host materials that addressed the persistent challenge of blue OLED operational lifetime.

• Volume IChapter 1. Introduction to Organic Light-Emitting Diodes 11.1. Introduction 11.2. OLED Device Structure and Light Emission Mechanism 71.3. OLED Materials 181.4. OLED Technology and Marketization 311.5. Future Outlook of OLED Technology 401.6. Conclusions 46References 47Chapter 2. Fundamental Concepts of Organic Light-Emitting Diodes 22.1. Key OLED Device Parameters 32.2. Factors Affecting OLED Device Aging 282.3. Strategies for Improving OLED Device Performance 342.3. Conclusion 55Reference 56Chapter 3. Anode Materials for Organic Light-Emitting Diodes 23.1. Introduction 23.2. Anode Materials 43.3. Energy Level Alignment Theory 163.4. Energy Level Alignment Measurements 243.5. Summary 26References 27Chapter 4. Hole Injection Materials for Organic Light-Emitting Diodes14.1. Introduction 14.2. Basic Requirements and Energy Level Considerations for Hole Injection Materials 34.3. Common Hole Injection Materials 74.4. Commercialized HIMs 314.5. Conclusion and Outlook 32References 34Chapter 5. Hole Transport Materials for OLEDs 25.1. Introduction 25.2. Working principle of HTMs 45.3. Performance Requirements for HTMs 75.4. Progress in HTMs 175.5. HTMs in Patents 755.6. Technology Roadmap for HTMs 825.7. Summary and Prospects 845.8. References 84Chapter 6. Carrier blocking layer materials for OLEDs 26.1. Introduction 26.2. The Role of Carrier Blocking Material 46.3. Hole Blocking Material 86.4 Electron blocking material 346.5 Conclusions and Outlook 52Reference 54Chapter 7 Fluorescent OLED material 27.1. Introduction 37.2. Blue Fluorescent OLED Materials 67.3. Red Fluorescent OLED Materials 427.4. Green Fluorescent OLED Materials 707.5 Summary 84Reference 86Chapter 8 Phosphorescent OLED materials 38.1. Introduction of Phosphorescent Materials 38.2. Green Phosphorescent Materials 178.3. Red Phosphorescent Materials 378.4. Blue Phosphorescent Materials 588.5. Near-Infrared Phosphorescent Materials 838.6. Summary 116Reference 118Chapter 9 Pt-Pd Phosphorescent Materials 29.1 Introduction to Pt-Pd Phosphorescent Materials 29.2 Development and Classification of Pt-Pd Phosphorescent Materials 79.3 Synthetic Examples of Phosphorescent Pt-Pd Complexes 399.4 Summary and Outlook 41Reference. 43Volume IIChapter 1: Fundamentals of TADF 41.1. Introduction to TADF Materials 4​​1.2. Photophysics and Mechanisms of TADF​ 13​​​​​Chapter 2: Molecular Design I: Donor–Acceptor Architectures 382.1. Twisted Donor-Acceptor (TDA) Molecular Geometries 392.2. TADF through-bond Charge Transfer (TBCT) 632.3. TADF Molecules Through Space Charge Transfer (TSCT) 64Chapter 3: Molecular Design II: Multi-Resonance (MR-TADF) 693.1. Classification of MR-TADF Emitters 723.2. Synthesis of MR-TADF Emitters 743.3. Modulation and Construction of MR-TADF Emitters 793.4. MR-TADF with Circularly Polyarized Emission 863.5. Future Directions​ of MR-TADF 100Chapter 4: Molecular Design III: Metal-Complex TADF 1024.1. Cu(I) Complexes TADF 1034.2. Au(III) TADF Emitters 1264.3. Ag(I) TADF Emitters 1374.4. Pt(II) Complex TADF Materials 1384.5. Pd(II) Complex TADF Materials 1414.6. Zn(II) Complex TADF Materials 1424.7. Sn(II) Complex TADF Materials 1444.8. Al(III) Complex TADF Materials 1454.9. Comparation of Different Type of TADF Materials 1474.10. Determining Emission Nature of the Metal Complex 1474.11. Conclusion and Perspective of TADF Metal Complex 148Chapter 5: Macromolecular TADF: Dendrimers & Polymers 1515.1. TADF Dendritic Macromolecule 1515.2. Polymer TADF Materials​ 164Chapter 6: TADF as Host Materials: Design & Applications 1846.1. Introduction to TADF Hosts​ 1846.2. TADF High Triplet Energy Hosts for Exciton Confinement 1846.3. TADF Hosts with Phosphorescent Emitters ​1866.4. TADF Hosts with Fluorescent Emitters ​1886.5. TADF Hosts with TADF Emitters ​1906.6. TADF Exciplex Hosts ​1926.7. MR-TADF Hosts​ 1936.8. Bifunctional Hosts with TADF Properties​ 1966.9. Pure Hydrocarbon Hosts for MR-TADF 1986.10. Deuterium TADF Hosts 2016.11. Summary of TADF Hosts 203Chapter 7: Organic TADF Emitters by Color 2047.1. Blue TADF emitters 2047.2. Green TADF emitters 2077.3. Red TADF emitters 2117.4. Organic Near-infrared-TADF materials 2157.5. TADF White light Emitters 218Chapter 8: MR-TADF Emitters: Strategies & Breakthroughs 2378.1. Blue MR-TADF Emitters 2388.2. Green MR-TADF Emitters 2418.3. Red and Infrared MR-TADF Emitters 2448.4. Infrared MR-TADF Emitters. 2478.5. Heavy-Atom Enhanced MR-TADF 249Chapter 9: Advanced Applications 2559.1. TADF-sensitized Hyperfluorescence Systems ​ 255​​9.2. Phosphorescent-sensitized Hyperphosphorescent OLEDs ​ 2779.3. Machine Learning and AI+OLED Materials Design ​ 2939.3.6. Machine Learning for OLED Materials: Challenges & Future Directions. 306Volume IIChapter 1 Fundamentals of TADF 41.1. Introduction to TADF Materials 4​​1.2. Photophysics and Mechanisms of TADF​ 13Chapter 2 Molecular Design I: Donor–Acceptor Architectures. 382.1. Twisted Donor-Acceptor (TDA) Molecular Geometries. 392.2. TADF through-bond Charge Transfer (TBCT) 632.3. TADF Molecules Through Space Charge Transfer (TSCT) 64Chapter 3 Molecular Design II: Multi-Resonance (MR-TADF) 693.1. Classification of MR-TADF Emitters 723.2. Synthesis of MR-TADF Emitters 743.3. Modulation and Construction of MR-TADF Emitters 793.4. MR-TADF with Circularly Polyarized Emission 863.5. Future Directions​ of MR-TADF 100Chapter 4 Molecular Design III: Metal-Complex TADF 1024.1. Cu(I) Complexes TADF 1034.2. Au(III) TADF Emitters.1264.3. Ag(I) TADF Emitters 1374.4. Pt(II) Complex TADF Materials 1384.5. Pd(II) Complex TADF Materials 1414.6. Zn(II) Complex TADF Materials 1424.7. Sn(II) Complex TADF Materials 1444.8. Al(III) Complex TADF Materials 1454.9. Comparation of Different Type of TADF Materials 1474.10. Determining Emission Nature of the Metal Complex 1474.11. Conclusion and Perspective of TADF Metal Complex 148Chapter 5 Macromolecular TADF: Dendrimers & Polymers 1515.1. TADF Dendritic Macromolecule 1515.2. Polymer TADF Materials​ 164Chapter 6 TADF as Host Materials: Design & Applications 1846.1. Introduction to TADF Hosts​ 1846.2. TADF High Triplet Energy Hosts for Exciton Confinement 1846.3. TADF Hosts with Phosphorescent Emitters ​1866.4. TADF Hosts with Fluorescent Emitters ​1886.5. TADF Hosts with TADF Emitters ​1906.6. TADF Exciplex Hosts ​1926.7. MR-TADF Hosts​ 1936.8. Bifunctional Hosts with TADF Properties​ 1966.9. Pure Hydrocarbon Hosts for MR-TADF 1986.10. Deuterium TADF Hosts 2016.11. Summary of TADF Hosts 203Chapter 7 Organic TADF Emitters by Color 2047.1. Blue TADF emitters 2047.2. Green TADF emitters 2077.3. Red TADF emitters 2117.4. Organic Near-infrared-TADF materials 2157.5. TADF White light Emitters. 218Chapter 8 MR-TADF Emitters: Strategies & Breakthroughs 2378.1. Blue MR-TADF Emitters 2388.2. Green MR-TADF Emitters 2418.3. Red and Infrared MR-TADF Emitters 2448.4. Infrared MR-TADF Emitters 2478.5. Heavy-Atom Enhanced MR-TADF 249Chapter 9 Advanced Applications 2559.1. TADF-sensitized Hyperfluorescence Systems ​2559.2. Phosphorescent-sensitized Hyperphosphorescent OLEDs ​2779.3. Machine Learning and AI+OLED Materials Design ​293Chapter 10 Challenges, Commercialization & Outlook 30810.1. Stability: The Degradation Mechanism of MR-TADF Blue Materials​ 30810.2. Tackling Efficiency Roll-off in Blue TADF OLEDs​ 31010.3. Commercialization Pathways​​ 31210.4. Outlook of TADF OLED Materials​​ 312REFERENCE 329Volume IIIChapter 11 Host Materials 211.1. Introduction to Host Materials 211.2. Classification of Host Materials 1611.3. Commercial Host Materials 7511.4. Conclusion and Outlook 90Reference 91Chapter 12 OLED Materials and Devices Based on AIE Characteristics 212.1. AIE Concept 212.2. Fundamental Principles of AIE 312.3. Development History. 812.4. Classification of AIE Fluorescent Materials 1112.5. AIE-Based OLED Materials and Devices 1512.6. Conclusions and Future Perspectives 28Reference  29Chapter 13 Electron Transport Materials 213.1. Introduction 213.2. Performance Requirements for ETMs 213.3. Categories of Organic Electron Transport Materials 1213.4. Modification Strategies for Electron Transport Materials 4413.5. Summary and Outlook 50Reference 52Chapter 14 Electron Injection Materials 114.1 Introduction 214.2 Energy Level Structure 314.3 Common Electron Injection Materials 414.4 Summary and Outlook 25Reference 28Chapter 15 Cathode Materials 215.1 Introduction. 215.2 Elemental Metals 315.3 Alloy Materials 415.4 Multi-layer Metal Structure 615.5 Metal Compounds 715.6 Composite Materials and Interface Engineering 1115.7 Top Emitting Device Cathode 1315.8 Summary. 16References 17Chapter 16 OLED coupling Layer iCP 216.1 Introduction 216.2 External Light Extraction Techniques (ELE) 416.3 Internal Light Extraction Techniques (ILE) 1216.4 Light Extraction Layer Materials 2216.5 Summary 4016.6 Reference 41Chapter 17 White Organic Electroluminescent Devices 317.1 Introduction 317.2 WOLED Device Classification 617.3 Overview of WOLED Efficiency Developments 717.4 Pure Phosphorescent, Sensitized Phosphorescent, and Doped WOLEDs 917.5 Specialty White Light Devices WOLEDs 1717.6 Strategies to Enhance the Operating Performance of WOLEDs 2017.7 Color Purity of WOLEDs (Color of WOLEDs) 3217.8 WOLEDs with different device structures 4917.9 WOLEDs in Lighting and Displays 71Chapter 18 High-Efficiency Solution-Processed OLED Materials and Devices 3Preface. 318.1 Classification of Solution-Processed OLED Materials and Devices. 418.2 OLED Device Fabrication Processes by Solution Methods. 618.3 Solution-Processed Hole Injection and Transport Materials HIM/HTM 1818.4 Solution-Processed EIM and ETM Materials 2918.5 Solution-Processed Host and Emitting Materials 3318.6 Solution-Processed Charge-generation Layer CGL and Tandem OLED Devices 4118.7 Development of Solution-Processed OLED in Industry 4418.8 Conclusion and Outlook 4718.9 References 49Chapter 19 Purification of OLED materials 119.1 Introduction 119.2 The influence of purity on device performance 219.3 Material purification method 319.4 Conclusion and Prospect 19Reference. 19Volume IVChapter 20 Preparation of Deuterated OLED Materials 220.1 Introduction 220.2 Lifetime enhancement of deuterated OLED materials 320.3 Synthesis and Process of Deuterated Compounds 1720.4 Synthesis of Deuterated OLED Materials 2920.5 Summary and Prospect of Deuterated OLED Materials 32Reference. 33Chapter 21 Enhancing OLED Device Performance through Molecular Orientation 221.1 Introduction 221.2 Impact of Molecularly Oriented HTMs on Device Performance 11Reference 28Chapter 22 OLED Lifetime and Aging 222.1 OLED Lifetime and Related Concepts 222.2 Factors Influencing OLED Aging 522.3 Strategies to Enhance OLED Lifetime. 622.4 Summary and Outlook. 1322.5 Reference. 15Chapter 24 OLED Material Calculations 224.1 Overview of OLED Material Simulation and Background 224.2 Material calculations and analysis at the molecular level 924.3 Computational Simulation at the Forefront of OLED Material Design 1924.4 Summary and Outlook 33References 35