Photoluminescence and Stability of Dion–Jacobson Tin-Based Halide Perovskites with Different Spacer Cation Chain Length

Photoluminescence and Stability of Dion–Jacobson Tin-Based Halide Perovskites with Different Spacer Cation Chain Length

Two-dimensional tin halide perovskites are of significant interest for light emitting applications. Here, we investigate the effect of organic cation A on the stability of different Dion–Jacobson tin-based halide perovskites. The ASnBr<sub>4</sub> materials using diammonium cation A with...

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Bibliographic Details
Main Authors: Muhammad Umair Ali, Wen Ting Sun, Aleksandr A. Sergeev, Atta Ur Rehman, Kam Sing Wong, Aleksandra B. Djurišić, Jasminka Popović
Format: Article
Language:English
Published: MDPI AG 2025-02-01
Series:Molecules
Subjects:
tin-based halide perovskite
photoluminescence
white emission
Online Access:https://www.mdpi.com/1420-3049/30/3/703
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Summary:Two-dimensional tin halide perovskites are of significant interest for light emitting applications. Here, we investigate the effect of organic cation A on the stability of different Dion–Jacobson tin-based halide perovskites. The ASnBr<sub>4</sub> materials using diammonium cation A with shorter alkyl chains are found to exhibit improved stability, exhibiting dramatic stability difference between the most stable HDASnBr<sub>4</sub>, where HDA denotes 1,6-hexanediammonium, and two materials with 8- and 10-carbon alkyl chain ammonium cations. The HDASnBr<sub>4</sub> powders were thermally stable at 100 °C in an argon environment but exhibited decreasing photoluminescence with time in ambient air at 100 °C. The sample degradation at 100 °C is accelerated compared to room temperature, but it proceeds along similar pathways, namely phase transformation followed by perovskite decomposition. Light emission from HDASnBr<sub>4</sub> thin films could be further enhanced by methanol vapor treatment, and warm white emission with Commission Internationale de l’Eclairage (CIE) coordinates (0.37, 0.34) could be obtained by combining HDASnBr<sub>4</sub> with a blue-emitting polymer film, while direct mixing of blue phosphor and HDASnBr<sub>4</sub> powder yields white emission with CIE coordinates of (0.34, 0.32).
ISSN:1420-3049

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