Photoluminescence and Stability of 2D Ruddlesden–Popper Halide Perovskites

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 PEA<sub>2</sub>PbI<sub>4</sub> exhibits more narrow emission and increased stability compared to BZA<sub>2</sub>PbI<sub>4</sub>. In addition, PEA<sub>2</sub>PbI<sub>4</sub> exhibits self-healing of defects evident from PL enhancement, which is absent for BZA<sub>2</sub>PbI<sub>4</sub>. The observed differences between perovskites with BZA and PEA spacer cations can be attributed to differences in the formation of spacer cation vacancies.

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Publication Details

Journal
Molecules
Published
2025-06-24
DOI
https://doi.org/10.3390/molecules30132716
Primary Topic
Perovskite Materials and Applications
Type
article
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article

Photoluminescence and Stability of 2D Ruddlesden–Popper Halide Perovskites

Atta Ur Rehman, Muhammad Umair Ali, Zhengtian Yuan, Zhilin Ren et al.
Molecules
Perovskite Materials and Applications
article

Photoluminescence and Stability of 2D Ruddlesden–Popper Halide Perovskites

Atta Ur Rehman, Muhammad Umair Ali, Zhengtian Yuan, Zhilin Ren, Jasminka Popović, Kam Sing Wong, Juraj Ovčar, Ivor Lončarić, Aleksandr A. Sergeev, Aleksandra B. Djurišić, Yanling He
article en

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 PEA<sub>2</sub>PbI<sub>4</sub> exhibits more narrow emission and increased stability compared to BZA<sub>2</sub>PbI<sub>4</sub>. In addition, PEA<sub>2</sub>PbI<sub>4</sub> exhibits self-healing of defects evident from PL enhancement, which is absent for BZA<sub>2</sub>PbI<sub>4</sub>. The observed differences between perovskites with BZA and PEA spacer cations can be attributed to differences in the formation of spacer cation vacancies.

MoleculesVol. 30(13)
Hong Kong University of Science and Technology (HK), Ruđer Bošković Institute (HR), University of Hong Kong (HK)
Openalex Percentile: Top 87%
Perovskite Materials and Applications
DOIOpen Access PDFOpenAlex
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Photoluminescence and Stability of 2D Ruddlesden–Popper Halide Perovskites — Atta Ur Rehman, Muhammad Umair Ali, et al. · Molecules (2025) | TGRS Research Map | TGRS