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Low-temperature solution-processed SnO2 electron transport layer modified by oxygen plasma for planar perovskite solar cells

Authors
Muthukrishnan, Akshaiya PadmalathaLee, JunyeoungKim, JongbokKim, Chang SuJo, Sungjin
Issue Date
Feb-2022
Publisher
ROYAL SOC CHEMISTRY
Citation
RSC ADVANCES, v.12, no.8, pp.4883 - 4890
Journal Title
RSC ADVANCES
Volume
12
Number
8
Start Page
4883
End Page
4890
URI
https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/21050
DOI
10.1039/d1ra08946c
ISSN
2046-2069
Abstract
SnO2 has attracted significant attention as an electron transport layer (ETL) because of its wide optical bandgap, electron mobility, and transparency. However, the annealing temperature of 180 degrees C-200 degrees C, as reported by several studies, for the fabrication of SnO2 ETL limits its application for flexible devices. Herein, we demonstrated that the low-temperature deposition of SnO2 ETL and further surface modification with oxygen plasma enhances its efficiency from 2.3% to 15.30%. Oxygen plasma treatment improves the wettability of the low-temperature processed SnO2 ETL that results in a larger perovskite grain size. Hence, oxygen plasma treatment effectively improves the efficiency of perovskite solar cells at a low temperature and is compatible with flexible applications.
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