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Proceedings Paper

Enhanced light out-coupling from surface plasmonic loss minimized transparent organic light-emitting diodes
Author(s): Jung-Bum Kim; Jeong-Hwan Lee; Chang-Ki Moon; Sei-Yong Kim; Jang-Joo Kim
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Paper Abstract

We report extremely high light out-coupling efficiency from a transparent organic light-emitting diode (OLED) integrated with microstructures on both sides of the device.[1] The OLED having a metal free structure offers dramatically reduced surface plasmonic loss and absorption loss. To extract the confined light inside the device, a high refractive index light extraction pattern was directly fabricated on the top side transparent conducting oxide electrode using a simple evaporation method, and a micro lens array sheet was simultaneously attached on the bottom side of the glass substrate. As a result, the external quantum efficiency of the device increased from 18.2% to 47.3% by using the microstructures, and was additionally enhanced to 62.9% by attaching an index-matched hemisphere lens instead of the micro lens array on the glass side in order to reduce additional light guiding loss inside of the device. These values showed very good agreement with the simulation performed by a combination of the dipole model and a 3-dimensional geometrical simulation.

Paper Details

Date Published: 27 September 2013
PDF: 10 pages
Proc. SPIE 8829, Organic Light Emitting Materials and Devices XVII, 88291M (27 September 2013); doi: 10.1117/12.2023898
Show Author Affiliations
Jung-Bum Kim, Seoul National Univ. (Korea, Republic of)
Jeong-Hwan Lee, Seoul National Univ. (Korea, Republic of)
Chang-Ki Moon, Seoul National Univ. (Korea, Republic of)
Sei-Yong Kim, Seoul National Univ. (Korea, Republic of)
Jang-Joo Kim, Seoul National Univ. (Korea, Republic of)


Published in SPIE Proceedings Vol. 8829:
Organic Light Emitting Materials and Devices XVII
Franky So; Chihaya Adachi, Editor(s)

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