Approaching the Lambertian limit in randomly textured thin-film solar cells
Approaching the Lambertian limit in randomly textured thin-film solar cells
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DOI：
10.1364/oe.19.00a865
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发表时间：
2011-07-04
期刊：
影响因子：
3.8
通讯作者：
Lederer, Falk
中科院分区：
文献类型：
--
作者：
Fahr, Stephan;Kirchartz, Thomas;Lederer, Falk
太阳能电池的朗伯极限是评估其效率的基准。研究表明，通过适当的光子管理，极厚或极薄太阳能电池的性能都可以接近这一极限。在这里，我们表明，这同样是可能的，实际相关的基于非晶硅的薄膜太阳能电池。最重要的是，我们实现这一目标依赖于随机纹理已经纳入最先进的上覆；唯一的微妙之处在于，它们的拓扑结构必须缩小到大约100纳米的典型特征尺寸。(C) 2011美国光学学会
The Lambertian limit for solar cells is a benchmark for evaluating their efficiency. It has been shown that the performance of either extremely thick or extremely thin solar cells can be driven close to this limit by using an appropriate photon management. Here we show that this is likewise possible for realistic, practically relevant thin-film solar cells based on amorphous silicon. Most importantly, we achieve this goal by relying on random textures already incorporated into state-of-the-art superstrates; with the only subtlety that their topology has to be downscaled to typical feature sizes of about 100 nm. (C) 2011 Optical Society of America