Traces of iron impurities in copper sources can be a poison to Cu(In, Ga)Se2 solar cells

Traces of iron impurities in copper sources can be a poison to Cu(In, Ga)Se2 solar cells

Abstract It has been widely accepted that the diffusion of iron from stainless steel substrates has detrimental impact on Cu(In, Ga)Se2 (CIGS) solar cell performance. However, the effect of traces of iron impurities in copper sources can be neglected all the time. In this work, 99.97% purity copper...

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Bibliographic Details
Main Authors: Zengyang Ma, Duoqi Gao, Junjun Zhang, Xinxin Liu, Jianmin Li, Junbo Gong, Xudong Xiao
Format: Article
Language:English
Published: Wiley-VCH 2022-06-01
Series:Nano Select
Subjects:
CIGS
copper sources
impurities
solar cells
Online Access:https://doi.org/10.1002/nano.202100296
Description
Summary:Abstract It has been widely accepted that the diffusion of iron from stainless steel substrates has detrimental impact on Cu(In, Ga)Se2 (CIGS) solar cell performance. However, the effect of traces of iron impurities in copper sources can be neglected all the time. In this work, 99.97% purity copper which contains only 0.03% iron was used to fabricate CIGS devices. Compared to the copper of 99.99% purity, it has been showed that this 0.03% difference in purity can lead to a 70% efficiency improvement for CuGaSe2 (CGS), 35% efficiency improvement for normal band gap CIGS, and 29% efficiency improvement for narrow band gap CIGS. These results revealed that traces of iron impurities in copper sources can be a fatal poison to CIGS solar cells.
ISSN:2688-4011

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