液晶与显示2026，Vol.41Issue(1)：55-64,10.DOI:10.37188/CJLCD.2025-0154
无机氧化物包覆提升绿光CdSe/ZnS量子点扩散板的稳定性
Stability enhancement of green CdSe/ZnS quantum dot diffuser plates via inorganic oxides coating
摘要
Abstract
This study aims to enhance the optical stability of CdSe/ZnS green quantum dots(QDs)in display applications by addressing their susceptibility to environmental factors,including moisture,oxygen,and incompatibility with polymers,which may result in ligand desorption and a decrease in luminescence efficiency.The more effective protection strategies were explored to improve their photostability and humid-thermal stability under blue light excitation.The QD@SiO2 coating layer was prepared on the surface of green QDs by microemulsion method and Stöber method,respectively.The QD@AlOx coating layer was prepared by sol-gel method.Then,the morphology,structure,and photoluminescence(PL)stability of the prepared QD@SiO2 and QD@AlOx were characterized.Finally,these two types of QD composite were respectively fabricated into green QD diffuser plates,which were subjected to aging tests under blue light(200 mW/cm²)and humid-thermal blue light conditions(50℃/90%RH,5 000 cd/m2 blue light)to assess their photostability and humid-thermal stability in display applications.Experimental results demonstrated that both the prepared QD@SiO2 and QD@AlOx exhibited excellent optical stability under blue light excitation.Among them,the AlOx protective layer has better stability in the humid-thermal aging tests due to its smaller specific surface area and pore volume,and can effectively suppress the attenuation of the photoluminescence efficiency of QDs.This study effectively enhanced the environmental stability of green QDs through two surface coating methods,meeting the essential requirements of display devices for high photostability and humid-thermal stability tolerance.It provides a theoretical basis and practical solution for the development of high-performance QD devices.关键词
绿光量子点/光学稳定性/SiO2/AlOx包覆层/寿命Key words
green-quantum dots/optical stability/SiO2/AlOx coating layers/lifetime分类
数理科学引用本文复制引用
李敏..无机氧化物包覆提升绿光CdSe/ZnS量子点扩散板的稳定性[J].液晶与显示,2026,41(1):55-64,10.基金项目
福厦泉国家自主创新示范区量子点新型显示技术协同创新平台项目(No.2023-P-010) Supported by Collaborative Innovation Platform Project for Quantum Dot New Display Technology in the Fuzhou-Xiamen-Quanzhou National Independent Innovation Demonstration Zone(No.2023-P-010) （No.2023-P-010）
