Dielectric particle and void resonators for thin film solar cell textures

被引:56
|
作者
Mann, Sander A. [1 ]
Grote, Richard R. [2 ]
Osgood, Richard M., Jr. [2 ]
Schuller, Jon A. [1 ]
机构
[1] Columbia Univ, Energy Frontier Res Ctr, New York, NY 10027 USA
[2] Columbia Univ, Microelect Sci Labs, New York, NY 10027 USA
来源
OPTICS EXPRESS | 2011年 / 19卷 / 25期
关键词
ENHANCED OPTICAL-ABSORPTION;
D O I
10.1364/OE.19.025729
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Using Mie theory and Rigorous Coupled Wave Analysis (RCWA) we compare the properties of dielectric particle and void resonators. We show that void resonators-low refractive index inclusions within a high index embedding medium-exhibit larger bandwidth resonances, reduced peak scattering intensity, different polarization anisotropies, and enhanced forward scattering when compared to their particle (high index inclusions in a low index medium) counterparts. We evaluate amorphous silicon solar cell textures comprising either arrays of voids or particles. Both designs support substantial absorption enhancements (up to 45%) relative to a flat cell with anti-reflection coating, over a large range of cell thicknesses. By leveraging void-based textures 90% of above-bandgap photons are absorbed in cells with maximal vertical dimension of 100 nm. (C) 2011 Optical Society of America
引用
收藏
页码:25729 / 25740
页数:12
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