Citation: Huan Hu, Ying Zhang, Shi-Shuang Huang, Zhi-Gang Li, Yungui Liu, Rui Feng, Wei Li. Temperature- and pressure-responsive photoluminescence in a 1D hybrid lead halide[J]. Chinese Journal of Structural Chemistry, ;2024, 43(10): 100395. doi: 10.1016/j.cjsc.2024.100395 shu

Temperature- and pressure-responsive photoluminescence in a 1D hybrid lead halide

Low-dimensional hybrid lead halides with responsive emissions have attracted considerable attention due to their potential applications in sensing. Herein, a new one-dimensional hybrid lead bromide CyPbBr3 (Cy = cytosine cation) was synthesized to explore its emission evolution in response to temperature and pressure. The compound possesses an edge-sharing 1D double-chain structure and emits warm white light across nearly the entire visible spectrum upon ultraviolet excitation. This emission arises from the self-trapped excitons and its broadband feature is attributed to the strong electron-phonon coupling as revealed by the variable-temperature photoluminescence experiments. Moreover, a 4.5-fold pressure-induced emission enhancement was observed at 2.7 GPa which is caused by the pressure suppressed non-radiative energy loss. Furthermore, in-situ powder X-ray diffraction and Raman experiments reveal the maxima of the emission enhancement is associated with a phase transition at the same pressure. Our work demonstrates that low-dimensional metal halides are a promising class of stimuli-responsive materials which could have potential applications in temperature and pressure sensing.
- Low-dimensional hybrid lead halides,
- Stimuli-responsive,
- Self-trapped excitons,
- Electron-phonon coupling,
- Emission enhancement
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