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Photoinduced Segregation Behavior in 2D Mixed Halide Perovskite: Effects of Light and Heat

Tik Lun, Leung; Ren, Zhilin; Syed, Ali Ashger; Grisanti, Luca; Djurišić, Aleksandra B.; Popović, Jasminka (2022) Photoinduced Segregation Behavior in 2D Mixed Halide Perovskite: Effects of Light and Heat. ASC energy letters, 7 (10). pp. 3500-3508. ISSN 2380-8195

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Photoinduced halide segregation (PHS) is a process of critical importance for the performance of perovskite solar cells with mixed halide absorber layers. However, PHS is still not well understood, especially in the case of layered mixed halide perovskites (MHPs), which are less commonly studied compared to their 3D counterparts. Here, we investigated temperature- and light-induced PHS in 2D MHPs with a phenylpropylammonium (PPA) spacer. We found that 2D PPA based MHPs exhibited complex segregation behavior dependence on temperature and illumination intensity with the suppression of segregation observed at high temperature (attributed to the highly exothermic nature of the process) as well as moderate illumination intensities, illustrating the importance of additional processes present in this particular material, which exhibits distinctly different behavior compared to 2D MHPs with other aromatic cations.

Item Type: Article
Uncontrolled Keywords: 2D perovskites; photosegregation
Subjects: NATURAL SCIENCES > Physics > Condensed Matter Physics
NATURAL SCIENCES > Chemistry > Inorganic Chemistry
Divisions: Division of Materials Physics
Project titleProject leaderProject codeProject type
2D i kvazi-2D perovskiti: od ciljanog strukturnog dizajna do poboljšane učinkovitosti i stabilnosti-Željko Skoko; Jasminka PopovićPZS-2019-02-2068HRZZ
Depositing User: Jasminka Popović
Date Deposited: 19 Feb 2024 09:15
DOI: 10.1021/acsenergylett.2c01688

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