Universidad Politécnica de Madrid

Instituto de energía solar

R&D at IES

Advanced characterization tools and device processing


This line emerged as a consequence of developing characterization tools suitable for intermediate band materials and solar cells. These techniques are now grouped in our Laboratory called IBLAB (Intermediate Band LABoratory) and includes, for example, quantum efficiency measurements capable of detecting the two-photon below bandgap absorption, photoluminescence, electroluminescence, photoreflectance, current-voltage characteristics under concentrated light and cryogenic temperatures, AFM, FTIR, DLTS, etc. These services are offered to external users since they can be used also to characterize conventional solar cells.  In addition, the layer structure of an intermediate band solar cell can be implemented on many materials. 

This has demanded the development of dedicated processing lines that can manufacture actual solar cells out from these materials. Our specific processing line includes evaporators, sputtering, wire bonding, plasma ashers, profilers, etc.

Contact person: Dr. Pablo García-Linares



Selected publications

  1. A. Martí, E. Antolin, C. R. Stanley, C. D. Farmer, N. Lopez, P. Diaz, et al., "Production of Photocurrent due to Intermediate-to-Conduction-Band Transitions: A Demonstration of a Key Operating Principle of the Intermediate-Band Solar Cell”, Physical Review Letters, vol. 97, pp. 247701-4, 2006. (DOI: 10.1103/PhysRevLett.97.247701)

  2. E. Antolin, A. Marti, J. Olea, D. Pastor, G. Gonzalez-Diaz, I. Martil, et al., "Lifetime recovery in ultrahighly titanium-doped silicon for the implementation of an intermediate band material”, Applied Physics Letters, vol. 94, pp. 042115-3, 2009. (DOI: 10.1063/1.3077202)

  3. A. Datas, E. López, I. Ramiro, E. Antolín, A. Martí, A. Luque, et al., "Intermediate Band Solar Cell with Extreme Broadband Spectrum Quantum Efficiency”, Physical Review Letters, vol. 114, p. 157701, 04/16/ 2015. (DOI: 10.1103/PhysRevLett.114.157701)

  4. P. G. Linares, A. Martí, E. Antolín, C. D. Farmer, I. Ramiro, C. R. Stanley, et al., "Voltage recovery in intermediate band solar cells”, Solar Energy Materials and Solar cells, vol. 98, pp. 240-244, 2012. (DOI: 10.1016/j.solmat.2011.11.015


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