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학술지 Direct Formation of Random Wrinkle on Emission Surface for Improved Light Out Coupling and Stable Angular Spectrum of White Organic Light Emitting Diodes
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저자
강소현, 주철웅, 하병학, 김주연, 이종희, 유병곤, 조남성, 노지환, 문제현
발행일
201901
출처
Journal of Luminescence, v.205, pp.66-71
ISSN
0022-2313
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.jlumin.2018.09.003
초록
To enhance the light out coupling and stabilize the angular spectrum of white organic light emitting diodes (WOLEDs), we formed a randomly distributed corrugation directly on the external glass surface. Using a metallic master, which was prepared using laser ablation, we have imprinted the corrugation pattern directly on the glass surface. Our method yields 32% increase in the external quantum efficiency, widened luminance distribution and low angular spectra variation. Considering WOLED as a lighting source, this feature is particularly appealing. Besides the implications of the spectrally stable efficient WOLEDs through random corrugation, our work suggests a new structural approach for various light applications in which efficiency and spectral stability matter.
KSP 제안 키워드
Angular spectrum, External Quantum Efficiency, Glass surface, Organic light-emitting diodes(OLEDS), Spectral stability, White organic light-emitting diodes, laser ablation, light-emitting diode(LED), lighting source, luminance distribution, structural approach