液晶与显示2024，Vol.39Issue(7)：875-882,8.DOI:10.37188/CJLCD.2024-0144
2-己基癸酸改性的全溶液制备的CsPbBr3量子点发光二极管
All-solution-processed CsPbBr3 quantum dot light-emitting diodes modified with 2-hexyldecanoic acid ligand
摘要
Abstract
Perovskite quantum dot(QD)light-emitting diodes are novel generation display technique with great potential.All-inorganic CsPbX3(X=Cl,Br,I)QDs exhibit excellent optoelectronic properties.However,the synthesis of CsPbX3 QDs usually requires the long-chain ligands such as oleic acid(OA)and oleylamine(OAm).The dynamic binding between these ligands and QDs makes them easily detach from the QD surface,thereby leading to the poor stability.In addition,the insulating properties of OA and OAm are not conducive to the charge transfer.In this work,we adopt the strategy of replacing OA with 2-hexyldecanoic acid(DA)partially,systematically studying the influence of DA/OA molar ratios on the optical properties of CsPbBr3 QDs.The results show that CsPbBr3 QDs modified by DA exhibit a high photoluminescence quantum yield of 88.64％.Based on this strategy,the all-solution-processed light-emitting diodes achieve the luminance of 155 cd·m-2 and external quantum efficiency(EQE)of 0.14％.Subsequently,by optimizing the energy levels between the perovskite layer and the hole transport layer,the luminance and EQE are further improved to 436 cd·m-2 and 0.20％.关键词
CsPbBr3量子点/新型显示技术/发光二极管/配体取代/全溶液制备Key words
CsPbBr3 quantum dots/novel generation display technique/light-emitting diodes/ligand replacement/all-solution-processing分类
信息技术与安全科学引用本文复制引用
吴加其,王程杨,陆红波,朱俊..2-己基癸酸改性的全溶液制备的CsPbBr3量子点发光二极管[J].液晶与显示,2024,39(7):875-882,8.基金项目
国家自然科学基金(No.52302237) （No.52302237）
安徽省自然科学基金(No.2308085ME137)Supported by National Natural Science Foundation of China(No.52302237) （No.2308085ME137）
Natural Science Foundation of Anhui Province(No.2308085ME137) （No.2308085ME137）
