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Enhanced UV stability of perovskite solar cells with a SrO interlayer

Authors
Lee, Sang-WonKim, SeongtakBae, SoohyunCho, KyungjinChung, TaewonHwang, Jae-KeunSong, InseolLee, WonkyuPark, SungeunJung, JaebongChun, JihunLee, Yoon JungMoon, Yeon JiLee, Hae-SeokKim, DonghwanBin Mo, ChanKang, Yoonmook
Issue Date
12월-2018
Publisher
ELSEVIER
Keywords
Perovskite solar cell; UV stability; Interface passivation; Strontium oxide; Micro-photoluminescence
Citation
ORGANIC ELECTRONICS, v.63, pp.343 - 348
Indexed
SCIE
SCOPUS
Journal Title
ORGANIC ELECTRONICS
Volume
63
Start Page
343
End Page
348
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/71278
DOI
10.1016/j.orgel.2018.09.019
ISSN
1566-1199
Abstract
We investigated strontium oxide (SrO) as an interlayer material to enhance the UV stability of a CH3NH3PbI3 perovskite solar cell. Moisture and over 400 nm wavelength of light were excluded to investigate the effect of UV light only. Two different interlayer fabrication processes were examined to optimize the performance of this solar cell. Devices fabricated by dipping for 30 min in SrO solution exhibited photoconversion efficiencies of 15.5%, whereas those fabricated with 60-min dipping showed photoconversion efficiencies of 15% and exhibited local Sr agglomeration. Devices with SrO displayed lower initial efficiencies than those without any SrO layer (17.6%), However, a device without SrO retained only 34.4% of its initial efficiency after 100 h of UV exposure. In contrast, SrO-incorporated devices retained almost 60.0% of their initial efficiency. Severe mu-PL mapping intensity degradation was observed in devices that did not include the interlayer, but no degradation was observed in those with the SrO interlayer. This can be attributed to the passivation of the degradation sites by SrO.
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Graduate School of Energy and Environment (KU-KIST GREEN SCHOOL) > Department of Energy and Environment > 1. Journal Articles
College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles

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공과대학 (신소재공학부)
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