液晶与显示2026，Vol.41Issue(1)：74-83,10.DOI:10.37188/CJLCD.2025-0187
CdZnSe基量子点用于高性能纯蓝光量子点发光二极管
CdZnSe-based quantum dots for high-performance pure-blue quantum dot light-emitting diodes
摘要
Abstract
Quantum dot light-emitting diodes(QLEDs)have attracted extensive attention in high-resolution displays and emerging fields such as augmented reality due to their narrow emission spectra,wide color gamut,high brightness,and low power consumption.However,the electroluminescent efficiency and stability of blue devices remain significantly inferior to those of red and green devices,and the lack of high-performance pure blue quantum dots(QDs)has limited the development of full-color displays.In this study,we report a synthesis strategy based on a ZnSe core with Cd ion-mediated emission tuning.CdZnSe core QDs were successfully prepared by rapid Cd2+injection under high-temperature conditions to induce ion exchange,achieving an emission peak at 469 nm with a photoluminescence quantum yield(PLQY)of 79%.Subsequently,a multilayer shell structure of ZnSe/ZnSeS/ZnS was epitaxially grown on the core QDs,effectively passivating surface defects,enhancing structural stability,and significantly suppressing non-radiative recombination.The resulting multilayer-capped QDs exhibited a stable emission peak at 463 nm with a PLQY further increased to 92%,showing pure blue emission.QLED devices fabricated using these QDs demonstrated excellent electroluminescent performance,with a peak external quantum efficiency(EQE)of 18.5%and a maximum brightness of 6.34×104 cd/m2.In summary,this strategy,combining ion exchange with multilayer shell passivation,enables the fabrication of high-PLQY,stable pure blue QDs and high-performance QLED devices.关键词
量子点发光二极管/纯蓝光发射/离子交换/核/壳结构Key words
quantum dot light-emitting diodes/pure-blue emission/ion exchange/core/shell structures分类
数理科学引用本文复制引用
张晔,李辉,郭宁,陈彦飙,李天辰,江雷,吴雨辰..CdZnSe基量子点用于高性能纯蓝光量子点发光二极管[J].液晶与显示,2026,41(1):74-83,10.基金项目
国家自然科学基金(No.T2425026,No.52173190) （No.T2425026,No.52173190）
江苏省卓越博士后计划(No.2025ZB663) （No.2025ZB663）
江苏省基础研究计划(No.BK20250477) Supported by National Natural Science Foundation of China(No.T2425026,No.52173190) （No.BK20250477）
Jiangsu Funding Program for Excellent Postdoctoral Talent(No.2025ZB663) （No.2025ZB663）
Basic Research Program of Jiangsu(No.BK20250477) （No.BK20250477）
