,White Hybrid Light-Emitting Devices Based on the Emission of Thermal Annealed Ternary CdSe/ZnS Quan

• 作 者: QU Da-Long ZHANG Zhen-Song YUE Shou-Zhen WU Qing-Yang YAN Ping-Rui ZHAO Yi LIU Shi-Yong
• 机 构: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering,Ji
• 出 处: 中国物理快报（英文版）
• 发表日期: 2012年9期

We report on a white hybrid light-emitting device employing a mixture of teary CdSe/ZnS quantum dots (QDs) as an emitting layer (EML) and a small molecular material tris(8-hydroxyquinoline) aluminum (Alq3) as an electron-transporting layer.The film morphology of the spin-coated mixture of QDs is strongly improved via thermal annealing,and therefore a close-packed QD-EML is realized between organic charge-transporting layers.As a result,compared to the device with an unannealed QD-EML,the emission of Alq3 is deeply suppressed.In addition,a maximum luminance of more than 1000cd/m2 and a maximum luminous efficiency of 2.2cd/A are achieved.