Journal
APPLIED PHYSICS LETTERS
Volume 100, Issue 17, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4709405
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- New Energy and Industrial Technology Development Organization (NEDO)
- Ministry of Economy, Trade and Industry (METI), Japan
- Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division, of the U.S. DOE [DE-AC02-05CH11231]
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We present evidence for the production of photocurrent due to two-photon excitation in an intermediate band solar cell structure. The structure consists of an n-GaNAs intermediate band layer sandwiched between a p-AlGaAs emitter and an n-AlGaAs barrier layer with suitable doping level to block electron escaping from the intermediate band to the bottom n-GaAs substrate. Multi-band transitions observed in two-photon excitation experiments are explained using photo-modulated reflectance spectrum, and further support for intermediate band solar cell operation of this structure is given by current-voltage measurements. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4709405]
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