A study on the optics of copper indium gallium (di)selenide (CIGS) solar cells with ultra-thin absorber layers
article
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. © 2014 Optical Society of America.
Topics
TNO Identifier
492955
ISSN
10944087
Source
Optics Express, 22(5), pp. A425-A437.
Publisher
Optical Society of America
Pages
A425-A437
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