壳层生长速率调控实现高效率蓝光量子点
High-efficiency Blue Quantum Dots Achieved Through Shell Growth Rate Regulation
摘要
Abstract
Quantum dots(QDs)exhibit high photoluminescence quantum yield(PLQY),high color purity,and solu-tion processability,making them widely applied in the field of lighting and displays.However,achieving high-efficiency and stable blue QDs and their devices remains a significant challenge.In this work,CdZnS/ZnS core-shell structure blue QDs were investigated,with octanethiol(OT)as the sulfur precursor for shell growth.The shell growth rate was tuned by controlling the injection rate of OT,enabling controlled epitaxial growth.The impact of shell growth rate on shell quality and the photoluminescence performance of CdZnS/ZnS QDs was systematically analyzed through testing methods such as transmission electron microscopy and transient/steady-state fluorescence spectroscopy.The results show that moderately re-ducing the growth rate effectively promotes uniform shell growth,achieving a high PLQY of 98％and a narrow full width at half maximum(FWHM)of 22 nm.However,excessively slow growth rates result in anisotropic shell growth,accompa-nied by the Kirkendall effect,resulting in a large number of lattice defects that reduce the photoluminescence perfor-mance.This work deepens the understanding of how growth rate affects the quality of QDs shell growth.关键词
CdZnS/ZnS量子点/前驱体注入速率/壳层生长动力学/发光性能Key words
CdZnS/ZnS quantum dots/precursor injection rate/shell growth dynamic/photoluminescence performance分类
数理科学引用本文复制引用
沈昭泽,黄菲,李家伟,余彬彬,王俊峰,宁甲甲,田建军..壳层生长速率调控实现高效率蓝光量子点[J].发光学报,2025,46(7):1151-1159,9.基金项目
国家重点研发计划(2023YFE0210600) （2023YFE0210600）
国家自然科学基金(52272134,52372132) （52272134,52372132）
北京市自然科学基金(2232082) （2232082）
广东省基础与应用基础研究基金(2022A151514007) （2022A151514007）
北京科技大学青年教师学科交叉研究项目(中央高校基本科研业务费专项资金(FRF-IDRY-23-033))Supported by National Key Research and Development Program of China(2023YFE0210600) （中央高校基本科研业务费专项资金(FRF-IDRY-23-033）
National Natural Science Foun-dation of China(52272134,52372132) （52272134,52372132）
Beijing Natural Science Foundation(2232082) （2232082）
Guangdong Basic and Applied Basic Research Foundation(2022A151514007) （2022A151514007）
Interdisciplinary Research Project for Young Teachers of USTB(Fundamental Re-search Funds for the Central Universities(FRF-IDRY-23-033)) （Fundamental Re-search Funds for the Central Universities(FRF-IDRY-23-033）
