中文版 | English
Title

Br Vacancy Defects Healed Perovskite Indoor Photovoltaic Modules with Certified Power Conversion Efficiency Exceeding 36%

Author
Corresponding AuthorWu, Shaohang; Mai, Yaohua
Publication Years
2022-10-01
DOI
Source Title
EISSN
2198-3844
Abstract

Indoor photovoltaics (IPVs) are expected to power the Internet of Things ecosystem, which is attracting ever-increasing attention as part of the rapidly developing distributed communications and electronics technology. The power conversion efficiency of IPVs strongly depends on the match between typical indoor light spectra and the band gap of the light absorbing layer. Therefore, band-gap tunable materials, such as metal-halide perovskites, are specifically promising candidates for approaching the indoor illumination efficiency limit of similar to 56%. However, perovskite materials with ideal band gap for indoor application generally contain high bromine (Br) contents, causing inferior open-circuit voltage (V-OC). By fabricating a series of wide-bandgap perovskites (Cs(0.17)FA(0.83)PbI(3-)(x)Br(x), 0.6 <= x <= 1.6) with varying Br contents and related band gaps, it is found that, the high Br vacancy (V-Br) defect density is a significant reason that leading to large V-OC deficits apart from the well-accepted halide segregation. The introduction of I-rich alkali metal small-molecule compounds is demonstrated to suppress the V-Br and increase the V-OC of perovskite IPVs up to 1.05 V under 1000 lux light-emitting diode illumination, one of the highest V-OC values reported so far. More importantly, the modules are sent for independent certification and have gained a record efficiency of 36.36%.

Keywords
URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
Others
Funding Project
National Natural Science Foundation of China[
WOS Research Area
Chemistry ; Science & Technology - Other Topics ; Materials Science
WOS Subject
Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS Accession No
WOS:000868849200001
Publisher
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:0
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/406507
DepartmentDepartment of Materials Science and Engineering
Affiliation
1.Jinan Univ, Inst New Energy Technol, Coll Informat Sci & Technol, Guangdong Engn Res Ctr Thin Film Photovolta Proc, Guangzhou 510632, Peoples R China
2.Jinan Univ, Key Lab New Semicond & Devices, Guangdong Higher Educ Inst, Guangzhou 510632, Peoples R China
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
4.South China Normal Univ, South China Acad Adv Optoelect, Inst Adv Mat, Guangzhou 510006, Peoples R China
5.South China Normal Univ, South China Acad Adv Optoelect, Guangdong Prov Key Lab Opt Informat Mat & Technol, Guangzhou 510006, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Cuiling,Liu, Chong,Gao, Yanyan,et al. Br Vacancy Defects Healed Perovskite Indoor Photovoltaic Modules with Certified Power Conversion Efficiency Exceeding 36%[J]. ADVANCED SCIENCE,2022.
APA
Zhang, Cuiling.,Liu, Chong.,Gao, Yanyan.,Zhu, Shusheng.,Chen, Fang.,...&Mai, Yaohua.(2022).Br Vacancy Defects Healed Perovskite Indoor Photovoltaic Modules with Certified Power Conversion Efficiency Exceeding 36%.ADVANCED SCIENCE.
MLA
Zhang, Cuiling,et al."Br Vacancy Defects Healed Perovskite Indoor Photovoltaic Modules with Certified Power Conversion Efficiency Exceeding 36%".ADVANCED SCIENCE (2022).
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