Light Trapping Optimization with Surface Micropatterning for Organic Solar Cells

Abstract

Solid state organic solar cells are currently attracting much attention in the pursuit of low cost photovoltaics. However their efficiencies are still below 10%, which is much lower than the theoretical limit. One of the main loss factors is the low light absorption due to the lack of a proper optic design. In this work, we propose a means to optimize light trapping in multilayer organic solar cells using the finite elements method. The analyzed optic design is based on a surface micropatterning, whose V-shape features maximize light absorption. The simulations confirm the improvement upon implementing the optic design and allow the optimization of such V-shape micropattering