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UV Degradation and Recovery of Perovskite Solar Cells

Scientific reports, 2016-12, Vol.6 (1), p.38150-38150, Article 38150 [Peer Reviewed Journal]

Copyright Nature Publishing Group Dec 2016 ;Copyright © 2016, The Author(s) 2016 The Author(s) ;ISSN: 2045-2322 ;EISSN: 2045-2322 ;DOI: 10.1038/srep38150 ;PMID: 27909338

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  • Title:
    UV Degradation and Recovery of Perovskite Solar Cells
  • Author: Lee, Sang-Won ; Kim, Seongtak ; Bae, Soohyun ; Cho, Kyungjin ; Chung, Taewon ; Mundt, Laura E ; Lee, Seunghun ; Park, Sungeun ; Park, Hyomin ; Schubert, Martin C ; Glunz, Stefan W ; Ko, Yohan ; Jun, Yongseok ; Kang, Yoonmook ; Lee, Hae-Seok ; Kim, Donghwan
  • Subjects: Encapsulation ; Illumination ; Light ; Photovoltaic cells ; Ultraviolet radiation
  • Is Part Of: Scientific reports, 2016-12, Vol.6 (1), p.38150-38150, Article 38150
  • Description: Although the power conversion efficiency of perovskite solar cells has increased from 3.81% to 22.1% in just 7 years, they still suffer from stability issues, as they degrade upon exposure to moisture, UV light, heat, and bias voltage. We herein examined the degradation of perovskite solar cells in the presence of UV light alone. The cells were exposed to 365 nm UV light for over 1,000 h under inert gas at <0.5 ppm humidity without encapsulation. 1-sun illumination after UV degradation resulted in recovery of the fill factor and power conversion efficiency. Furthermore, during exposure to consecutive UV light, the diminished short circuit current density (J ) and EQE continuously restored. 1-sun light soaking induced recovery is considered to be caused by resolving of stacked charges and defect state neutralization. The J and EQE bounce-back phenomenon is attributed to the beneficial effects of PbI which is generated by the decomposition of perovskite material.
  • Publisher: England: Nature Publishing Group
  • Language: English
  • Identifier: ISSN: 2045-2322
    EISSN: 2045-2322
    DOI: 10.1038/srep38150
    PMID: 27909338
  • Source: Open Access: DOAJ Directory of Open Access Journals
    Open Access: PubMed Central
    AUTh Library subscriptions: ProQuest Central
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