关于具有超薄吸收层的铜铟镓（二）硒化物（CIGS）太阳能电池光学特性的研究

A study on the optics of copper indium gallium (di)selenide (CIGS) solar cells with ultra-thin absorber layers.

作者信息

Xu Man, Wachters Arthur J H, van Deelen Joop, Mourad Maurice C D, Buskens Pascal J P

出版信息

Opt Express. 2014 Mar 10;22 Suppl 2:A425-37. doi: 10.1364/OE.22.00A425.

DOI:10.1364/OE.22.00A425

Abstract

We present a systematic study of the effect of variation of the zinc oxide (ZnO) and copper indium gallium (di)selenide (CIGS) layer thickness on the absorption characteristics of CIGS solar cells using a simulation program based on finite element method (FEM). We show that the absorption in the CIGS layer does not decrease monotonically with its layer thickness due to interference effects. Ergo, high precision is required in the CIGS production process, especially when using ultra-thin absorber layers, to accurately realize the required thickness of the ZnO, cadmium sulfide (CdS) and CIGS layer. We show that patterning the ZnO window layer can strongly suppress these interference effects allowing a higher tolerance in the production process.

摘要

我们使用基于有限元方法（FEM）的模拟程序，对氧化锌（ZnO）和铜铟镓（二）硒化物（CIGS）层厚度变化对CIGS太阳能电池吸收特性的影响进行了系统研究。我们表明，由于干涉效应，CIGS层中的吸收并不随其层厚度单调下降。因此，在CIGS生产过程中需要高精度，特别是在使用超薄吸收层时，以准确实现所需的ZnO、硫化镉（CdS）和CIGS层厚度。我们表明，对ZnO窗口层进行图案化可以强烈抑制这些干涉效应，从而在生产过程中允许更高的公差。