低启亮电压全溶液加工量子点发光器件  

All-solution processed quantum dot light-emitting diodes with low turn-on voltage

作　　者：曹丽娟 江从彪 罗宇 李妙姿 黎佳立 寸阳珂 王坚[1] 彭俊彪[1] 曹镛[1] CAO Li-juan;JIANG Cong-biao;LUO Yu;LI Miao-zi;LI Jia-li;CUN Yang-ke;WANG Jian;PENG Jun-biao(School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China)

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《液晶与显示》2020年第8期785-794,共10页Chinese Journal of Liquid Crystals and Displays

基　　金：国家自然科学基金(No.U1601651)。

摘　　要：采用旋涂制备的纳米银(Silver nanoparticle,Ag NPs)作为阴极,制备了全溶液加工的红、绿、蓝量子点发光二极管(red,green,blue-quantum dots light-emitting diodes,R-,G-,B-QLEDs)。并针对溶液加工Ag NPs阴极器件启亮电压(Turn-on voltage,Vt)较蒸镀Ag阴极器件偏高的问题,采用了低真空与热退火组合工艺干燥Ag NPs阴极,实现了可以与真空蒸镀金属阴极比拟的Vt,R-,G-,B-QLEDs的Vt分别为1.9,2.6,3.2 V。实验结果表明,该阴极处理工艺可能为研制低Vt的全印刷显示发光器件提供新的工艺思路。All-solution processed red,green,blue-quantum dot light-emitting diodes(R-,G-,B-QLEDs)were fabricated by using spin-coated silver nanoparticles(Ag NPs)as the cathode.In order to solve the higher turn-on voltage(Vt)compared to QLEDs with vacuum deposited Ag cathode,a combination of low-vacuum and thermal annealing drying process was used to dry the Ag NPs cathode.With this new process,the Vt of R-,G-,B-QLEDs was reduced to 1.9 V,2.6 V,3.2 V,respectively,which was comparable to the devices with vacuum deposited Ag cathode.The results show that the cathode treatment process may provide a new process idea for fabricating fully printing display light-emitting devices with low Vt.

关 键 词：全溶液加工 低启亮电压 量子点发光二极管 纳米银电极 低真空/热退火干燥工艺 

分 类 号：O482.31[理学—固体物理]