喷墨打印量子点墨水调控  

Ink Formulation of Quantum Dots in Ink Jet Printing

作　　者：郭标 穆兰 罗宇[1] 李丹阳 王俊杰[1] 李妙姿 彭俊彪[1] GUO Biao;MU Lan;LUO Yu;LI Dan-yang;WANG Jun-jie;LI Miao-zi;PENG Jun-biao(State Key Laboratory of Luminescent Materials and Devices,South China University of Technology,Guangzhou 510641,China)

机构地区：[1]华南理工大学发光材料与器件国家重点实验室,广东广州510641

出　　处：《发光学报》2021年第6期880-888,共9页Chinese Journal of Luminescence

基　　金：国家自然科学基金(61574061);广东省科技计划(2015B090914003)资助项目。

摘　　要：设计了环己基苯与十八烯的双溶剂量子点墨水体系,研究了具有CdSe@ZnS/ZnS核/壳结构的绿光量子点(QDs)成膜规律及其发光特性。设计的高沸点、低表面张力的十八烯和低沸点、高表面张力的环己基苯所组成的双溶剂墨水体系增强了马兰戈尼流,减弱了量子点在像素坑边缘的沉积,实现了在像素坑中制备表面平整的量子点薄膜。研制的分辨率为240 PPI的倒置结构顶发射绿光量子点阵列发光器件启亮电压2.7 V,最高亮度132 510 cd/m^(2),最大外量子效率14.0%,为采用喷墨打印工艺制备高性能量子点电致发光点阵器件提供了借鉴。In this paper,a two-solvent quantum dot ink system based on cyclohexylbenzene and octadecene was designed,and the film formation and luminescent properties of green quantum dots(QDs)with CdSe@ZnS/ZnS core/shell structure were investigated.The double solvent ink designed with high boiling point,low surface tension of octadecene and high boiling point,low surface tension of cyclohexylbenzene benzene can enhance the Marangoni effect,weaken the quantum dots accumulation on the edge of the pixel pits,and uniform pixel QDs films were achieved.The green quantum dot array light-emitting device with upside-down and top-emitting structure was fabricated with the threshold voltage of 2.7 V,a maximum brightness of 132510 cd/m^(2) and a maximum external quantum efficiency of 14.0%.The results may provide a reference for the preparation of high-performance QD-LEDs array by inkjet printing technology.

关 键 词：喷墨打印 墨水调控 量子点薄膜 倒置结构 量子点发光二极管 

分 类 号：O482.31[理学—固体物理]