Fine control of optical scattering characteristics of porous polymer light-extraction layer for organic light-emitting diodes

被引：24
作者：
Go, Hyeck [1 ,2 ]
Han, Eun-Mi [2 ]
Kang, Moon Hee [1 ,3 ]
Kim, Yong Hyun [4 ]
Yun, Changhun [1 ]
机构：
[1] Korea Inst Ind Technol KITECH, Ctr Nanophoton Convergence Technol, Gwangju 61012, South Korea
[2] Chonnam Natl Univ, Sch Chem Engn, Gwangju 61186, South Korea
[3] Keimyung Univ, Dept Elect Energy Engn, Daegu 42601, South Korea
[4] Pukyong Natl Univ, Dept Display Engn, Busan 48513, South Korea
来源：
ORGANIC ELECTRONICS | 2019年 / 67卷
关键词：
Organic light emitting diodes; Outcoupling; Light-extraction; Immersion precipitation; Optical scattering; IMMERSION PRECIPITATION; EFFICIENCY; MEMBRANES; INDEX;
D O I：
10.1016/j.orgel.2019.01.014
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The optical scattering properties of porous polyimide (PI) films were investigated for the light-extraction layer in organic light-emitting diodes (OLEDs). By adjusting mixing ratios of different non-solvents during the immersion precipitation process, the light scattering at the generated porous PIs can be precisely tuned. Analyzed from the final OLED devices based on prepared scattering substrates, we found that the light-output characteristics of fabricated devices are correlated with the optical scattering properties, which depends on both the size of generated pores inside porous PIs and the surface roughness at the air-interface. From the help of Mie scattering and Surface scattering simulations, a systematic approach has been performed to explain the influence of the generated micro-structure on both the optical scattering and OLED-performance.
引用
收藏
页码：79 / 88
页数：10
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