Composition dependent structural, optical and photosensitive properties of a series of charge-transfer tin halides
作者:Chong-Jiao Mo、Zhao-Qi Li、Chen-Jie Que、Guang-Lin Zhang、Qin-Yu Zhu、Jie Dai
DOI:10.1016/j.dyepig.2017.01.073
日期:2017.6
10-phenanthroline, X/Y = Cl, Br, I, m + n = 4) were designed and prepared to study main group metal halides as photosensitive dyes. The colors of compounds are tunable with the change of mole ratio of the halides due to the ligand to ligand charge-transfer (LLCT). Intense visible-range absorption can be obtained by increasing the mole ratio of iodine and intense ultraviolet fluorescence emission can be obtained
一系列有机-无机杂化卤化锡,配制成Sn(phen)X m Y n(phen = 1,10-菲咯啉,X / Y = Cl,Br,I,m + n = 4)被设计和制备以研究作为光敏染料的主族金属卤化物。由于配体对配体的电荷转移(LLCT),卤化物摩尔比的变化可调节化合物的颜色。通过增加碘的摩尔比可以得到强烈的可见光吸收,而通过增加氯的摩尔比可以得到强烈的紫外荧光发射。DFT计算表明LLCT从富电子卤离子到phen的π*轨道发生。碘化物材料具有窄的能隙和适合的激发态能级,以将激子转移到TiO 2半导体中。使用化合物处理的TiO 2的光电流响应实验电极显示,在辐照后产生稳定的光电流,Sn(phen)I 4具有最佳的光敏性能。