Large Integrated Absorption Enhancement in Plasmonic Solar Cells by Combining Metallic Gratings and Antireflection Coatings

被引：330
|
作者：
Munday, Jeremy N. [1 ]
Atwater, Harry A. [1 ]
机构：
[1] CALTECH, Thomas J Watson Lab Appl Phys, Pasadena, CA 91125 USA
来源：
NANO LETTERS | 2011年 / 11卷 / 06期
关键词：
Solar cells; photovoltaics; plasmonics; absorption enhancement; grating; OPTICAL-ABSORPTION;
D O I：
10.1021/nl101875t
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We describe an ultrathin solar cell architecture that combines the benefits of both plasmonic photovoltaics and traditional antireflection coatings. Spatially resolved electron generation rates are used to determine the total integrated current improvement under AM1.5G solar illumination, which can reach a factor of 1.8. The frequency-dependent absorption is found to strongly correlate with the occupation of optical modes within the structure, and the improved absorption is mainly attributed to improved coupling to guided modes rather than localized resonant modes.
引用
收藏
页码：2195 / 2201
页数：7
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