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Proceedings Paper

OLED light extraction with corrugated substrate and hemispherical lens (Conference Presentation)
Author(s): Xiangyu Fu; Cheng Peng; Dong-Hun Shin; Monica Samal; Franky So

Paper Abstract

While the internal quantum efficiency of an OLED can reach 100%, its external quantum efficiency (EQE) is limited to 30% because of light trapped in waveguided mode, SPP mode and substrate mode. In this study, we achieve more than 2X enhancement in EQE by using a corrugated substrate and a hemispherical lens. Polarized angle-resolved electroluminescence spectroscopy is used to analyzed the EL data, and the results are compared with optical simulation. We find the efficiency enhancement mainly comes from the diffraction of the SPP mode towards air mode due to the corrugated substrate, and the hemispherical lens assists the light extraction by extending the air cone into the substrate mode.

Paper Details

Date Published: 19 September 2017
Proc. SPIE 10362, Organic Light Emitting Materials and Devices XXI, 103620K (19 September 2017); doi: 10.1117/12.2275554
Show Author Affiliations
Xiangyu Fu, Univ. of Florida (United States)
Cheng Peng, Univ. of Florida (United States)
Dong-Hun Shin, North Carolina State Univ. (United States)
Monica Samal, North Carolina State Univ. (United States)
Franky So, North Carolina State Univ. (United States)

Published in SPIE Proceedings Vol. 10362:
Organic Light Emitting Materials and Devices XXI
Franky So; Chihaya Adachi; Jang-Joo Kim, Editor(s)

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