상세정보
학술지
Direct Formation of Random Wrinkle on Emission Surface for Improved Light Out Coupling and Stable Angular Spectrum of White Organic Light Emitting Diodes
- 발행일
- 201901
- 출처
- Journal of Luminescence, v.205, pp.66-71
- ISSN
- 0022-2313
- 출판사
- Elsevier
- 협약과제
- 17ZB1900, 초저가 플렉서블 Lighting Surface 기술 개발, 유병곤
- 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