期刊
ACS ENERGY LETTERS
卷 7, 期 10, 页码 3500-3508出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.2c01688
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资金
- Seed Funding for Basic Research
- Seed Funding for Strategic Interdisciplinary Research Scheme of the University of Hong Kong, RGC CRF project [7018-20G]
- NSFC [6207032617]
- Research Cooperability Program of the Croatian Science Foundation [PZS-201902-2068]
- European Union from the European Social Fund under the Operational Programme Efficient Human Resources
This study investigated temperature- and light-induced halide segregation in 2D mixed halide perovskites with a phenylpropylammonium spacer. The research found complex segregation behavior in the 2D perovskites, which showed distinct differences compared to 2D perovskites with other aromatic cations.
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.
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