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Journal Article
Organic Light Emitting Diode with Uniform Luminance Distribution and Enhanced Efficiency via Random Embossing Structure
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- Authors
- Keunsoo Lee, Jonghee Lee, Chul Woong Joo, Joo Yeon Kim, Doo-Hee Cho, Jeong-Ik Lee, Hye Yong Chu, Jaehyun Moon, Byeong-Kwon Ju
- Issue Date
- 2014-09
- Citation
- Electrochemical and Solid-State Letters, v.3, no.11, pp.Q56-Q59
- ISSN
- 1099-0062
- Publisher
- Electrochemical Society (ECS)
- Language
- English
- Type
- Journal Article
- Abstract
- Using the lateral phases separation of a binary immiscible polymer blend, we have fabricated a random embossing structure (RES). The RES was investigated as a potential structure for organic light-emitting diode (OLED) light extraction. Our RES yields uniform light extraction in a broad angle (0째~70째) range with spectral stability. Blue phosphorescence OLEDs equipped with the RES showed an enhancement of 20% in external quantum efficiency (EQE)and spectral stability within ?봷,y < 0.01 in a viewing angle range of 0째~70째. Our RES provides a new and practical approach for achieving enhanced efficiency and spectral stability of OLEDs.