Universidad Politécnica de Madrid

Instituto de energía solar


Crystalline silicon solar cell development


The Instituto de Energía Solar has pioneered the research on silicon solar cells. It was the first to propose the bifacial solar cell concept, able to convert the light received in both sides of the cell, and to commercialize these type of cells through the spin-off company Isofotón, founded in the early 80s.

Since then, relevant contributions have been made in the field, for example the use of n-type substrates, the development of Boron-doped emitters, the manufacturing of silicon solar cells for concentration. Efforts have been also dedicated to the adaptation of solar cell processes to low-cost silicon wafers.

To drive silicon-based solar cells beyond the limits of a single-junction solar cell, the Institute is collaborating with the Instituto de Tecnología Microelectrónica from the Universidad del País Vasco in the development of silicon-based tandem solar cells, with an original approach in which several subcells of different materials are monolithically integrated onto a silicon solar cell, taking advantage of a parallel connection.

Contact person: Prof. Carlos del Cañizo


Selected publications

  1. J. C. Jimeno, R. Gutierrez, V. Fano, A. Habib, C. del Cañizo, M. A. Rasool, and A. Otaegi, "A 3 Terminal Parallel Connected Silicon Tandem Solar Cell", Energy Procedia (Proceedings of the 6th International Conference on Crystalline Silicon Photovoltaics - SiliconPV 2016), vol. 92, pp. 644-651, 2016. (DOI: 10.1016/j.egypro.2016.07.031)

  2. I. Tobías, C. del Cañizo, J. Alonso, "Crystalline silicon solar cells and modules". Handbook of Photovoltaic Science and Engineering - Second edition. pp. 265 - 308. John Wiley & Sons, 2011. ISBN 978-0-470-72169-8


  1. A. Pan, C. del Cañizo, E. Cánovas, N. M. Santos, J. P. Leitao, and A. Luque, "Enhancement of up-conversion efficiency by combining rare earth-doped phosphors with PbS quantum dots", Solar Energy Materials & Solar Cells (Special Issue: Inorganic and Nanostructured Photovoltaics (EMRS B), vol. 94, pp. 1923-1926 2010. (DOI: 10.1016/j.solmat.2010.06.028)

  2. C. del Cañizo; A. Moehlecke; I. Zanesco; I. Tobías; A. Luque. "Analysis of a technology for CZ bifacial solar cells", IEEE Transactions on Electron Devices, 48 (10), pp. 2337 - 2341. IEEE, 2001. ISSN 0018-9383

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