Temperature-responsive emission and elastic properties of a new 2D lead halide perovskite
| Autor: | Muhammad Azeem, Na Sun, Zhuo-Zhen Zhang, Zhi-Gang Li, Zhao-Quan Yao, Wei Li, Yan Qin, Jia-Hui Fan |
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| Rok vydání: | 2021 |
| Předmět: |
Photoluminescence
Materials science Band gap Halide 02 engineering and technology Atmospheric temperature range 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Thermal expansion 0104 chemical sciences Inorganic Chemistry Chemical physics Density functional theory 0210 nano-technology Anisotropy Perovskite (structure) |
| Zdroj: | Dalton Transactions. 50:2648-2653 |
| ISSN: | 1477-9234 1477-9226 |
| DOI: | 10.1039/d0dt04165c |
| Popis: | Two-dimensional (2D) organometallic halide perovskites (OHPs) are promising optoelectronic materials because of their excellent stability and tunable band gaps. Herein, we report the optical and elastic properties of a newly synthesized 2D lead halide perovskite, (C9H14ON)2PbI4 (C9H14ON+ = 4-methoxyphenethylammonium), by a combined experimental and theoretical approach. Our experiments demonstrate that (C9H14ON)2PbI4 shows a strong green emission under ambient conditions which is ascribed to its band gap of 2.4 eV. Moreover, our temperature-dependent photoluminescence (PL) experiments in the temperature range of 143-283 K reveal that the green emission red-shifts with increasing temperature, which is primarily attributed to the synergistic effect of thermal expansion and electron-phonon interactions. The elastic properties, obtained from density functional theory calculations, reveal that (C9H14ON)2PbI4 has relatively low modulus and anisotropy compared with other 2D materials. |
| Databáze: | OpenAIRE |
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