期刊
NANO LETTERS
卷 10, 期 11, 页码 4692-4696出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl1029804
关键词
Light trapping; group theory; symmetry breaking; optical absorption; Lambertian limit
类别
资金
- NSF through UC Berkeley SINAM
- National Science Foundation [TG-PHY100046]
We examine light trapping in thin silicon nanoscructures for solar cell applications. Using group theory, we design surface nanoscructures with an absorptance exceeding the Lambertian limit over a broad band at normal incidence. Further, we demonstrate that the absorptance of nanorod arrays closely follows the Lambertian limit for isotropic incident radiation. These effects correspond to a reduction in silicon mass by 2 orders of magnitude, pointing to the promising future of thin crystalline silicon solar cells.
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