0D and 2D: The Cases of Phenylethylammonium Tin Bromide Hybrids
0D and 2D: The Cases of Phenylethylammonium Tin Bromide Hybrids
复制标题
DOI：
10.1021/acs.chemmater.0c01254
复制
发表时间：
2020-06-09
影响因子：
8.6
通讯作者：
Ma, Biwu
中科院分区：
文献类型：
--
作者：
Xu, Liang-Jin;Lin, Haoran;Ma, Biwu
卤化锡钙钛矿和钙钛矿相关材料已成为各种光电应用的有前途的无铅杂化材料。虽然在分子水平上具有不同结构和可控维度的有机锡卤化物杂化物的开发已经取得了显着进展，但最近报道的一些有争议的结果需要得到解决。例如，对于二维（2D）（PEA）（2）SnBr 4（PEA =苯基乙基铵），几个小组已经报道了不同的电子物理性质，其在468和550 nm附近具有不同的发射峰。在这里，我们报告了我们的努力，在合成苯乙基铵溴化锡杂化物的零维（0D）和2D结构，并表征其结构和物理性质。发现0D [（PEA）（4）SnBr6][（PEA）Br]（2）[CCl2H2]（2）在566 nm处表现出强的黄色发射峰，光致发光量子效率（PLQE）接近90%，而2D（PEA）（2）SnBr4在470 nm处具有弱的发射峰，PLQE为
Tin halide perovskites and perovskite-related materials have emerged as promising lead-free hybrid materials for various optoelectronic applications. While remarkable progress has been achieved in the development of organic tin halide hybrids with diverse structures and controlled dimensionalities at the molecular level, some controversial results that have been reported recently need to be addressed. For instance, different photophysical properties have been reported for two-dimensional (2D) (PEA)(2)SnBr4 (PEA = phenylethylammonium) by several groups with distinct emission peaks at around 468 and 550 nm. Here we report our efforts in the synthesis of phenylethylammonium tin bromide hybrids with zero-dimensional (0D) and 2D structures, and characterizations of their structural and photophysical properties. 0D [(PEA)(4)SnBr6][(PEA)Br](2)[CCl2H2](2) was found to exhibit strong yellow emission peak at 566 nm with a photoluminescence quantum efficiency (PLQE) of similar to 90%, while 2D (PEA)(2)SnBr4 had weak emission peak at 470 nm with a PLQE of