406 Optimum Design of Optical Multilayer Coatings for Solar Cell : Study on Spectral Control Considering Spectral-response Characteristics of Absorbing Layers

Abstract

Usually solar panels are coated with anti-reflection films on their surface. The films aim to reduce and control the reflection from the surface of the panels. If multilayer thin films coating on the solar panel has the function of spectral control considering spectral-response characteristics of the absorbing layer of solar cell in addition to the anti-reflective function, optical and electrical losses will be reduced and the conversion efficiency will be improved. Several design results of multilayer thin films for CIGS solar cell by using the optimum design program for optical thin films developed in our laboratory are reported in this paper.