Xia Hongbo, Wu Suli, Liu Yang
Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission, Key Laboratory of Photosensitive Materials & Devices of Liaoning Province, School of Physics and Materials Engineering, Dalian Minzu University, Dalian, People's Republic of China.
Nanotechnology. 2020 May 15;31(20):205704. doi: 10.1088/1361-6528/ab70f8. Epub 2020 Jan 28.
Photoluminescence intensity of the perovskite QDs coupled with TiO was decreased significantly owing to the electron transfer between them. Hererin, the composite of CsPb(ClBr) with TiO inverse opal was fabricated and we have proved that the effect of scattering of TiO inverse opal layer by layer under the incident excitation light for the enhancement of perovskite QDs photoluminescence intensity is far greater than the decrease of photoluminescence intensity caused by the electron transfer between QDs and TiO. Particularly, photoelectrochemical characterizations exhibit high charge separation effciency and fast response speed in water. This study opens new possibilities for optoelectronic and photo display applications of perovskites-based NCs.
由于钙钛矿量子点（QDs）与TiO之间的电子转移，钙钛矿量子点与TiO耦合后的光致发光强度显著降低。在此，制备了CsPb(ClBr)与TiO反蛋白石的复合材料，并且我们已经证明，在入射激发光下，TiO反蛋白石层对钙钛矿量子点光致发光强度增强的逐层散射效应远大于量子点与TiO之间电子转移导致的光致发光强度降低。特别地，光电化学表征显示在水中具有高电荷分离效率和快速响应速度。这项研究为基于钙钛矿的纳米晶在光电子和光显示应用方面开辟了新的可能性。
