Temperature and pressure-induced excitation-dependent emissions in zero-dimensional hybrid metal halides with mixed halogens

Xu，Bin1; Li，Qian2; Han，Jiang1; Chen，Zhongwei1; Luo，Zhishan1; Chen，Yulin1; Quan，Zewei1

2024-05-21

10.1063/5.0205703

Journal of Chemical Physics   影响因子和分区

0021-9606

1089-7690

Zero-dimensional (0D) hybrid metal halides (HMHs) have emerged as a promising platform for exploring excitation-dependent multicolor luminescent materials owing to their diverse crystal structures and chemical compositions. Nevertheless, understanding the mechanism behind excitation-dependent emissions (EDEs) in 0D HMHs and achieving precise modulation remains challenging. In this work, the delicate regulations on the EDE of 0D (DMEDABr)SnBrI (DMEDA: N, N′-dimethylethylenediamine) with mixed halogens are achieved under low temperature and high pressure, respectively. The inhomogeneous halogen occupation at the atomic scale leads to the formation of Br-rich and I-rich SnX (X = Br, I) octahedra, which act as distinct luminescent centers upon photoexcitation. At low temperatures, the narrowed photoluminescence spectra could distinguish the individual emissions from different luminescent centers, resulting in a pronounced EDE of (DMEDABr)SnBrI. In addition, the contraction and distortion of the luminescent SnX (X = Br, I) centers at high pressure further result in different degrees of emission shifts, giving rise to the gradual emergence and disappearance of EDE. This work elucidates the underlying mechanism of EDE in 0D HMHs and highlights the crucial role of halogens in determining the optical properties of metal halides.

SCI ; EI

英语

第一

CHEMISTRY

2-s2.0-85193205309

Scopus

1.Department of Chemistry,Southern University of Science and Technology (SUSTech),Shenzhen,Guangdong,518055,China
2.School of Physics Science and Information Technology,Shandong Key Laboratory of Optical Communication Science and Technology,Liaocheng University,Liaocheng,Shandong,252000,China

Xu，Bin,Li，Qian,Han，Jiang,et al. Temperature and pressure-induced excitation-dependent emissions in zero-dimensional hybrid metal halides with mixed halogens[J]. Journal of Chemical Physics,2024,160(19).

Xu，Bin.,Li，Qian.,Han，Jiang.,Chen，Zhongwei.,Luo，Zhishan.,...&Quan，Zewei.(2024).Temperature and pressure-induced excitation-dependent emissions in zero-dimensional hybrid metal halides with mixed halogens.Journal of Chemical Physics,160(19).

Xu，Bin,et al."Temperature and pressure-induced excitation-dependent emissions in zero-dimensional hybrid metal halides with mixed halogens".Journal of Chemical Physics 160.19(2024).