电子元件与材料2025，Vol.44Issue(4)：384-393,10.DOI:10.14106/j.cnki.1001-2028.2025.0176
Zn掺杂CsPbClxBr3-x钙钛矿纳米晶的光学性能研究
Study on the optical properties of Zn-doped CsPbClxBr3-x perovskite nanocrystals
摘要
Abstract
For all-inorganic CsPbX3 perovskite nanocrystals,rapid progress has been achieved in green and red perovskite nanocrystal light-emitting diodes(LEDs).However,developing pure-blue perovskite LEDs based on CsPbClxBr3-x nanocrystals with both good stability and excellent optoelectronic performance remains a considerable challenge.As is well known,metal ion doping and halogen exchange can endow perovskite materials with exciting and novel optoelectronic properties.A series of Zn2+-doped CsPbClxBr3-x perovskite nanocrystals were synthesized via the hot-injection method,and characterizations of the structure,morphology,lifetime,photoluminescence(PL)spectra,and temperature-dependent PL spectra were carried out.Compared with the undoped CsPbClxBr3-x perovskite nanocrystals,Zn2+and halogen ions(Br-,Cl-)form a more stable perovskite octahedral crystal structure,which inhibits the formation of vacancy defects,and the lifetime of the Zn2+-doped CsPbClxBr3-x perovskite nanocrystals is significantly increased.The PL emission peak of the Zn2+-doped CsPbClxBr3-x perovskite nanocrystals exhibits a red shift from 425 nm to 458 nm with increasing Zn2+doping concentration,due to the synergistic effect of zinc doping and bromine substitution for chlorine.The photoluminescence quantum yield(PLQY)of the Zn2+-doped CsPbClxBr3-x perovskite nanocrystals is significantly increased from 3.45％to 19.71％.For the Zn2+-doped CsPbClxBr3-x perovskite nanocrystals,the PL emission peak shows a clear blue shift from 455 nm to 449 nm as the temperature increases from 80 K to 300 K,and the intensity of the PL emission peak at 80 K is approximately 11.6 times higher than that at 300 K.关键词
铅卤钙钛矿/Zn掺杂/纳米晶/发光性质/变温光谱Key words
lead halide perovskite/Zn doping/nanocrystals/luminous properties/temperature-dependent PL spectra分类
通用工业技术引用本文复制引用
冯博,方有斌,陈宏岩,袁曦,华杰..Zn掺杂CsPbClxBr3-x钙钛矿纳米晶的光学性能研究[J].电子元件与材料,2025,44(4):384-393,10.基金项目
国家自然科学基金(22378158) （22378158）
吉林省科技发展计划项目(20230508040RC) （20230508040RC）
吉林省教育厅科学技术研究项目(JJKH20250942KJ) （JJKH20250942KJ）
