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  • Liu, Lige, et al. (author)
  • Photodegradation of Organometal Hybrid Perovskite Nanocrystals : Clarifying the Role of Oxygen by Single-Dot Photoluminescence
  • 2019
  • In: The Journal of Physical Chemistry Letters. - : AMER CHEMICAL SOC. - 1948-7185. ; 10:4, s. 864-869
  • Journal article (peer-reviewed)abstract
    • Photostability has been a major issue for perovskite materials. Understanding the photodegradation mechanism and suppressing it are of central importance for applications. By investigating single-dot photoluminescence spectra and the lifetime of MAPbX(3) (MA = CH3NH3+, X = Br, I) nanocrystals with quantum confinement under different conditions, we identified two separate pathways in the photodegradation process. The first is the oxygen-assisted light-induced etching process (photochemistry). The second is the light-driven slow charge-trapping process (photophysics), taking place even in oxygen-free environment. We clarified the role of oxygen in the photodegradation process and show how the photoinduced etching can be successfully suppressed by OSTE polymer, preventing an oxygen-assisted reaction.
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Type of publication
journal article (1)
Type of content
peer-reviewed (1)
Author/Editor
Linnros, Jan, 1953- (1)
Liu, Lige (1)
Sychugov, Ilya (1)
Huang, Sheng (1)
Zhong, Haizheng (1)
Deng, Luogen (1)
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Zhang, Pei (1)
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University
Royal Institute of Technology (1)
Language
English (1)
Research subject (UKÄ/SCB)
Natural sciences (1)
Year
2019 (1)

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