Increasing the Efficiency of Ideal Solar Cells by Photon Induced Transitions at Intermediate Levels
- 30 June 1997
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 78 (26), 5014-5017
- https://doi.org/10.1103/physrevlett.78.5014
Abstract
Recent attempts have been made to increase the efficiency of solar cells by introducing an impurity level in the semiconductor band gap. We present an analysis of such a structure under ideal conditions. We prove that its efficiency can exceed not only the Shockley and Queisser efficiency for ideal solar cells but also that for ideal two-terminal tandem cells which use two semiconductors, as well as that predicted for ideal cells with quantum efficiency above one but less than two.Keywords
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