Antonio Luque is professor emeritus at the Technical University of Madrid, and he leads the Institute of Solar Energy which he founded in 1979. In 1997 he developed the concept of the intermediate band solar cell, a novel idea that can be applied to nanotechnology. His seminal paper on the intermediate band solar cell has received over 675 citations in Web of Knowledge, and over 1000 citations in Harzing’s Publish or Perish. Professor Luque has also received numerous distinctions, among them Fellow of the Royal Academy of Engineering (Spain), foreign member of the Russian Academy of Sciences, two honorary doctorates (Spain), Member of Honour of the Ioffe Institute in St Petersburg, the European Commission Becquerel Prize and the IEEE Cherry Award prize. He has published numerous peer-reviewed papers, authored a book in English and edited several other books.

• Introduction.- Calculations derived of the single band effective mass Equation.- Four band approximation.- Interband optical absorption in quantum well solar cells.- Conclusions.

Antonio Luque is professor emeritus at the Technical University of Madrid, and he leads the Institute of Solar Energy which he founded in 1979. In 1997 he developed the concept of the intermediate band solar cell, a novel idea that can be applied to nanotechnology. His seminal paper on the intermediate band solar cell has received over 675 citations in Web of Knowledge, and over 1000 citations in Harzing’s Publish or Perish. Professor Luque has also received numerous distinctions, among them Fellow of the Royal Academy of Engineering (Spain), foreign member of the Russian Academy of Sciences, two honorary doctorates (Spain), Member of Honour of the Ioffe Institute in St Petersburg, the European Commission Becquerel Prize and the IEEE Cherry Award prize. He has published numerous peer-reviewed papers, authored a book in English and edited several other books.

• Introduction.- Calculations derived of the single band effective mass Equation.- Four band approximation.- Interband optical absorption in quantum well solar cells.- Conclusions.

Antonio Luque is professor emeritus at the Technical University of Madrid, and he leads the Institute of Solar Energy which he founded in 1979. In 1997 he developed the concept of the intermediate band solar cell, a novel idea that can be applied to nanotechnology. His seminal paper on the intermediate band solar cell has received over 675 citations in Web of Knowledge, and over 1000 citations in Harzing’s Publish or Perish. Professor Luque has also received numerous distinctions, among them Fellow of the Royal Academy of Engineering (Spain), foreign member of the Russian Academy of Sciences, two honorary doctorates (Spain), Member of Honour of the Ioffe Institute in St Petersburg, the European Commission Becquerel Prize and the IEEE Cherry Award prize. He has published numerous peer-reviewed papers, authored a book in English and edited several other books.

• Introduction.- Calculations derived of the single band effective mass Equation.- Four band approximation.- Interband optical absorption in quantum well solar cells.- Conclusions.