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Fully Scalable and Stable CsPbl(2)Br Solar Cells Realized by an All-Spray-Coating Process

Authors
Lee, David SunghwanKi, Min JeongLee, Hyong JoonPark, Jin KyoungHong, Seok YeongKim, Bong WooHeo, Jin HyuckIm, Sang Hyuk
Issue Date
2월-2022
Publisher
AMER CHEMICAL SOC
Keywords
all-inorganic CsPbI2Br; all-spray-coating process; fully scalable; MoO2 hole transport layer; carbon black electrode
Citation
ACS APPLIED MATERIALS & INTERFACES, v.14, no.6, pp.7926 - 7935
Indexed
SCIE
SCOPUS
Journal Title
ACS APPLIED MATERIALS & INTERFACES
Volume
14
Number
6
Start Page
7926
End Page
7935
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/141152
DOI
10.1021/acsami.1c21644
ISSN
1944-8244
Abstract
Spray-coating is a scalable and time-efficient technique for the development of large-area metal halide perovskite (MHP) solar cells. However, a bottleneck still exists toward the development of fully scalable n-i-p-type MHP solar cells particularly on spray-coating the hole transporting layer (HTL). Here, we present a reliable strategy of spray-coating the HTL by using MoO2 nanoparticles with small amounts of poly(triarylamine) (PTAA) binders to ensure uniform coverage and efficient charge extraction. By spray-coating all layers except the Au electrode, we achieve high and scalable efficiencies of 14.26 and 13.88% for CsPbI2Br unit cells (0.12 cm(2)) and submodules (25 cm(2)), respectively. We then extend toward an all-spray-coating process by spray-coating carbon black as the top counter electrode, resulting in a submodule efficiency of 10.08%. Finally, we also demonstrate good long-term stability of the submodules under damp heat conditions (85 degrees C/85% relative humidity) over 1000 h.
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