The text showcases the use of 2D nanomaterials for renewable energy devices, presents current research trends on green energy, and covers topics such as multi-junction solar cells, III-V compound-based solar cells, and perovskite. • Covers nanomaterials, devices, and applications of advanced devices in green energy system development. • Discusses cutting-edge materials that promise greater flexibility and efficiency, such as tandem structures, quantum dots, and organic photovoltaics. • Highlights new developments in offshore wind farms, wind turbine design, and enhanced energy capture across a range of wind conditions. • Investigates the incorporation of renewable energy sources into charging networks, in developing more environment-friendly electric mobility systems. • Examines automated controls, real-time data systems, and smart grid technologies that integrate renewable energy sources and optimize energy distribution. The text is primarily written for senior undergraduates, graduate students, and academic researchers in electrical engineering, electronics and communications engineering, energy engineering, renewable energy, clean technologies, nanoscience, and nanotechnology.