期刊
APPLIED PHYSICS LETTERS
卷 100, 期 8, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3682101
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资金
- U.S. Department of Energy, Basic Energy Sciences Energy Frontier Research Center (DoE-LMI-EFRC) [DOE DE-AC02-05CH11231]
- National Defense Science and Engineering Graduate (NDSEG) [32 CFR 168 a]
The thermodynamic efficiency of a single junction solar cell is bounded by the Shockley-Queisser detailed balance limit at similar to 30% [W. Shockley and H. J. Queisser, J. Appl. Phys. 32, 510 (1961)]. This maximal efficiency is considered achievable using a semiconductor within a restricted bandgap range of 1.1-1.5 eV. This work upends this assumption by demonstrating that the optimal material bandgap can be shifted to lower energies by placing selective reflectors around the solar cell. This technique opens new possibilities for lower bandgap materials to achieve the thermodynamic limit and to be effective in high efficiency solar cells. (C) 2012 American Institute of Physics. [doi:10.1063/1.3682101]
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