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
作者单位：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
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
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 cdA-1、15.4%,提高率达到54.0%。当粗糙度介于1~4 m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。
Research to improve out-coupling efficiency of green organic light-emitting devices based on surface treatment
ZHOU Jun-hong1, HAN Shao-hu2, ZHOU Deng-jin1, WU Zhong-jie1, WU Jiang-hong1, LU Guo-quan1, LUO Xu-dong1
1. Guangdong Institute of Metrology, Guangzhou 510405, China;
2. South China University of Technology, Guangzhou 510641, China
Abstract: The authors modified the device surfaces from smooth to rough based on the sand-blasting 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.
Keywords: organic green light-emitting device; out-coupling efficiency; external quantum efficiency; sand-blasting
2014, 40(3): 133-136 收稿日期: 2013-8-30;收到修改稿日期: 2013-10-24
基金项目: 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)
作者简介: 周军红(1980-),男,湖北天门市人,工程师,博士,主要从事LED/OLED/太阳能光伏领域计量检测技术的研究。
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