Organic Light Emitting Diode with Uniform Luminance Distribution and Enhanced Efficiency via Random Embossing Structure

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 (0°∼70...

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Bibliographic Details
Published in:ECS solid state letters 2014-09, Vol.3 (11), p.R56-R59
Main Authors: Lee, Keunsoo, Lee, Jonghee, Joo, Chul Woong, Kim, Joo Yeon, Cho, Doo-Hee, Lee, Jeong-Ik, Chu, Hye Yong, Moon, Jaehyun, Ju, Byeong-Kwon
Format: Article
Language:English
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Summary: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 (0°∼70°) 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 Δx,y < 0.01 in a viewing angle range of 0°∼70°. Our RES provides a new and practical approach for achieving enhanced efficiency and spectral stability of OLEDs.
ISSN:2162-8742
2162-8750
DOI:10.1149/2.0051411ssl