Simulation and optimization of 1-D periodic dielectric nanostructures for light-trapping.
Simulation and optimization of 1-D periodic dielectric nanostructures for light-trapping.
复制标题
用于光捕获的一维周期性介电纳米结构的模拟和优化。
作者：
Peng Wang;R. Menon
光捕获是提高薄膜太阳能电池性能的关键。在本文中，我们进行了一维方形和正弦光栅结构的参数优化，作为纳米光子散射体，以增加超薄（10nm）太阳能电池的光吸收。我们的优化结果表明，在有源层厚度为10nm的器件中，在散射结构的存在下，短路电流密度可以提高约5倍。更复杂的几何形状允许增加设计自由度和潜在的高增强光吸收。
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.