The photonic light trap—Improved light trapping in solar cells by angularly selective filters
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- 作者：MariusPeters ; Jan Christoph Goldschmidt ; Thomas Kirchartz ; Benedikt Blä ; si
- 关键词：Photonic crystals ; Novel concepts ; Solar cell ; Scattering
- 刊名：Solar Energy Materials and Solar Cells
- 出版年：2009
- 出版时间：October 2009
- 年：2009
- 卷：93
- 期：10
- 页码：1721-1727
- 全文大小：566 K
文摘
A photonic light trap, i.e. a combination of an angularly selective filter and a light scattering process in a solar cell, results in potentially very efficient light trapping. Angularly selective filters are investigated theoretically and experimentally. One of the filters is used to realize a photonic light trap for a thin-film solar cell with amorphous-silicon absorber layer on a roughened superstrate. We experimentally demonstrate that the light absorption in this solar cell is enhanced by 25 % in a wavelength range of 700–750 nm. Accordingly, the quantum efficiency of the solar cell demonstrates an increase of 25 % in the same wavelength range.