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US 9,431,558 B2Granted
CIGS type compound solar cell
AssigneeNitto Denko Corporation
InventorsSeiki Teraji, Kazunori Kawamura, Yusuke Yamamoto, Hiroto Nishii, Taichi Watanabe
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Abstract
A CIGS type compound solar cell excellent in both productivity and conversion efficiency is provided. The CIGS type solar cell includes a CIGS light absorbing layer, a buffer layer and a transparent electrode layer provided in this order on a substrate. The buffer layer is made of a mixed crystal compound containing ZnO, MgO and ZnS being present at specific ranges respectively.
Claims1
A CIGS type compound solar cell, comprising:
- a substrate, and
- a light absorbing layer, a buffer layer and a transparent electrode layer provided in this order over the substrate,
- wherein the light absorbing layer comprises at least a Group I-III-VI compound semiconductor,
- wherein the buffer layer comprises a mixed crystal compound comprising ZnO, MgO and ZnS,
- wherein a ZnS content of the buffer layer is 0.5 to 5.0 mol %, and
- wherein a molar ratio (MgO+ZnS)/(ZnO+MgO+ZnS) of the buffer layer is 0.08 to 0.4.
3 more elements
Dependencies are inferred from the claim text.