Temperature-responsive emission and elastic properties of a new 2D lead halide perovskite

被引：24
作者：
Fan, Jia-Hui [1 ,2 ]
Qin, Yan [3 ,4 ]
Azeem, Muhammad [1 ,2 ]
Zhang, Zhuo-Zhen [1 ,2 ]
Li, Zhi-Gang [1 ,2 ]
Sun, Na [5 ,6 ]
Yao, Zhao-Quan [1 ,2 ]
Li, Wei [1 ,2 ]
机构：
[1] Nankai Univ, Sch Mat Sci & Engn, Tianjin 300350, Peoples R China
[2] Nankai Univ, Tianjin Key Lab Met & Mol Based Mat Chem, Tianjin 300350, Peoples R China
[3] Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China
[4] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China
[5] Nankai Univ, Sch Chem, Tianjin 300071, Peoples R China
[6] Nankai Univ, State Key Lab Elementoorgan Chem, Tianjin 300071, Peoples R China
来源：
DALTON TRANSACTIONS | 2021年 / 50卷 / 07期
基金：
中国国家自然科学基金;
关键词：
CONSTANTS; IODIDE;
D O I：
10.1039/d0dt04165c
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
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)(2)PbI4 (C9H14ON+ = 4-methoxyphenethylammonium), by a combined experimental and theoretical approach. Our experiments demonstrate that (C9H14ON)(2)PbI4 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)(2)PbI4 has relatively low modulus and anisotropy compared with other 2D materials.
引用
收藏
页码：2648 / 2653
页数：6
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