表面处理提高绿色OLED外量子效率研究  

Research to improve out-coupling efficiency of green organic light-emitting devices based on surface treatment

作　　者：周军红[1] 韩绍虎[2] 周登锦[1] 吴忠杰[1] 吴江宏[1] 陆国权[1] 罗旭东[1] 

机构地区：[1]广东省计量科学研究院,广东广州510405 [2]华南理工大学,广东广州510641

出　　处：《中国测试》2014年第3期133-136,共4页China Measurement & Test

基　　金：国家质量监督检验检疫总局科研项目(201310006-03);广东省质量技术监督局科研项目(2013ZJ04)

摘　　要：该文通过喷砂打磨技术使器件的表面粗糙化,有效地压制了玻璃层内的光波导,促进光子在玻璃-空气界面的散射,大幅度提高了有机绿色发光器件的输出耦合效率。有机绿色电致发光器件的流明效率、外量子效率分别提高到44.9 cd·A-1、15.4%,提高率达到54.0%。当粗糙度介于1~4μm之间时,器件的输出耦合效率提高率随着表面粗糙度的减小而提高。同时,粗糙表面对发光器件的朗伯体特性没有带来任何影响。The authors modified the device surfaces from smooth to rough based on the sandblasting process. The rough surface effectively suppresses the optical waveguide in the glass layer, promoting photon scattering in the glass-air interface, thereby significantly improves output coupling efficiency of GOLED. The GOLED＇s luminous efficiency and external quantum efficiency was raised to 44.9 cd·A^-1 and 15.4%, respectively, the improvement rate reached to 54.0%. Furthermore, the improvement of the out-coupling efficiency is monotonously decreasing with the surface roughness within the roughness range from around 1 μm to 4 μm. At the same time, there has not caused any effect to the Lambertian characteristics of the lighting devices by the rough surface. The technology provides the opportunity for large-area applications.

关 键 词：有机绿色电致发光器件 输出耦合效率 外量子效率 喷砂打磨 

分 类 号：TN383.1[电子电信—物理电子学] TH161.14[机械工程—机械制造及自动化]