Photoluminescence and Stability of 2D Ruddlesden–Popper Halide Perovskites

Ren, Zhilin; Yuan, Zhengtian; Sergeev, Aleksandr A.; Lončarić, Ivor; Ali, Muhammad Umair; Rehman, Atta Ur; Wong, Kam Sing; He, Yanling; Ovčar, Juraj; Popović, Jasminka; Djurišić, Aleksandra B. (2025) Photoluminescence and Stability of 2D Ruddlesden–Popper Halide Perovskites. Molecules, 30 (13). ISSN 1420-3049

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Abstract

Two-dimensional lead halide perovskites are of significant interest for a variety of practical applications. However, the relationships between their composition and properties are not fully clear. Here we investigated photoluminescence from 2D Ruddlesden–Popper perovskites with different bulky spacer cations. Significant differences in their optical properties and stability are observed, and perovskites with benzylammonium (BZA) and phenethylammonium (PEA) were selected for more detailed investigation of the observed stability differences due to their similar structure. We find that PEA2PbI4 exhibits more narrow emission and increased stability compared to BZA2PbI4. In addition, PEA2PbI4 exhibits self-healing of defects evident from PL enhancement, which is absent for BZA2PbI4. The observed differences between perovskites with BZA and PEA spacer cations can be attributed to differences in the formation of spacer cation vacancies.

Item Type:	Article
Uncontrolled Keywords:	lead halide perovskite; photoluminescence; stability
Subjects:	NATURAL SCIENCES > Chemistry
Divisions:	Division of Materials Physics Theoretical Physics Division
Depositing User:	Ana Zečević
Date Deposited:	06 Nov 2025 12:44
URI:	http://fulir.irb.hr/id/eprint/10167
DOI:	10.3390/molecules30132716

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