Wang Peng, Menon Rajesh
Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, UT 84112, USA.
Opt Express. 2012 Jan 16;20(2):1849-55. doi: 10.1364/OE.20.001849.
Light-trapping is essential to improve the performance of thin-film solar cells. In this paper, we perform a parametric optimization of 1-D square and sinusoidal grating structures that act as nanophotonic scatterers to increase light absorption in ultra-thin (10nm) solar cells. Our optimization reveals that the short-circuit current density in a device of active-layer thickness 10nm can be improved by a factor of ~5 in the presence of the scattering structure. More complex geometries allow for increased degrees of design freedom and potentially high enhancement of light absorption.
光捕获对于提高薄膜太阳能电池的性能至关重要。在本文中，我们对一维方形和正弦光栅结构进行了参数优化，这些结构作为纳米光子散射体，以增加超薄（10纳米）太阳能电池中的光吸收。我们的优化结果表明，在存在散射结构的情况下，有源层厚度为10纳米的器件中的短路电流密度可提高约5倍。更复杂的几何形状允许增加设计自由度，并可能大幅提高光吸收。
