当前位置: X-MOL 学术Chem. Mater. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Broad Photoluminescence and Second-Harmonic Generation in the Noncentrosymmetric Organic–Inorganic Hybrid Halide (C6H5(CH2)4NH3)4MX7·H2O (M = Bi, In, X = Br or I)
Chemistry of Materials ( IF 8.6 ) Pub Date : 2021-10-14 , DOI: 10.1021/acs.chemmater.1c02896
Da Chen 1 , Shiqiang Hao 2 , Liubing Fan 1 , Yangwu Guo 3 , Jiyong Yao 3 , Christopher Wolverton 2 , Mercouri G. Kanatzidis 2 , Jing Zhao 1 , Quanlin Liu 1
Affiliation  

Recent discoveries in organic−inorganic metal halides reveal superior semiconducting and polarization properties. Herein, we report three organic–inorganic metal halides, (PBA)4BiBr7·H2O, (PBA)4BiI7·H2O, and (PBA)4InBr7·H2O [(PBA)+ = C6H5(CH2)4NH3+], with band gaps of ∼3.52, ∼2.29, and ∼4.05 eV, respectively. They possess zero-dimensional structures containing the inorganic octahedra [MX6]3– (M = Bi, In, X = Br, I) and unbound X ions and crystallize in the C2 space group. (PBA)4BiI7·H2O shows a second-harmonic-generation (SHG) response in the infrared region, approximately 1.3 times that of AgGaS2; (PBA)4BiBr7·H2O and (PBA)4InBr7·H2O show SHG responses in the ultraviolet region, approximately 0.4 and 0.6 times that of KH2PO4, respectively. The large SHG responses are attributed to the synergistic contribution of the octahedral distortion of [MX6]3– (M = Bi, In, X = Br, I) and the ordered arrangement of the benzene ring-containing organic cation PBA+. Upon ultraviolet and visible-light excitations at room temperature, (PBA)4BiBr7·H2O, (PBA)4BiI7·H2O, and (PBA)4InBr7·H2O exhibit broad red-light luminescence with large Stokes shifts of 290, 237, and 360 nm, respectively, due to self-trapped exciton emission. All of these properties demonstrate that this series of metal halides are potential multifunctional optoelectronic materials.

中文翻译:

非中心对称有机-无机杂化卤化物 (C6H5(CH2)4NH3)4MX7·H2O(M = Bi、In、X = Br 或 I)中的宽泛光致发光和二次谐波产生

有机-无机金属卤化物的最新发现揭示了优异的半导体和极化特性。在此,我们报告了三种有机-无机金属卤化物,(PBA) 4 BiBr 7 ·H 2 O、(PBA) 4 BiI 7 ·H 2 O 和 (PBA) 4 InBr 7 ·H 2 O [(PBA) + = C 6 H 5 (CH 2 ) 4 NH 3 + ],带隙分别为~3.52、~2.29和~4.05 eV。它们具有包含无机八面体 [MX 6 ] 3– 的零维结构(M = Bi, In, X = Br, I) 和未结合的 X 离子并在C 2 空间群中结晶。(PBA) 4 BiI 7 ·H 2 O 在红外区域显示二次谐波(SHG)响应,大约是 AgGaS 2 的1.3 倍;(PBA) 4 BiBr 7 ·H 2 O 和 (PBA) 4 InBr 7 ·H 2 O 在紫外区显示出 SHG 响应,分别约为 KH 2 PO 4 的0.4 和 0.6 倍。大的 SHG 响应归因于 [MX 6] 3– (M = Bi, In, X = Br, I) 和含苯环的有机阳离子 PBA +的有序排列。在室温下紫外和可见光激发下,(PBA) 4 BiBr 7 ·H 2 O、(PBA) 4 BiI 7 ·H 2 O 和 (PBA) 4 InBr 7 ·H 2 O 表现出广泛的红光发光由于自陷激子发射,斯托克斯位移分别为 290、237 和 360 nm。所有这些特性都表明这一系列金属卤化物是潜在的多功能光电材料。
更新日期:2021-10-26
down
wechat
bug