期刊
ADVANCED FUNCTIONAL MATERIALS
卷 22, 期 16, 页码 3454-3459出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201200876
关键词
OLED; waveguide; extraction; defective hexagonal-close-packed array
类别
资金
- Department of Energy [DE-FG0207ER46464]
- Department of Energy Office of Energy Efficiency and Renewable Energy [DE-EE0001522]
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1028490] Funding Source: National Science Foundation
Defective silica sphere arrays having locally hexagonal-closed-packed structure but lack of long range ordering were incorporated into organic light emitting diodes as grating to extract the waveguided light trapped in the indium tin oxide/organic layers and the glass substrate. Using these defective hexagonal-closed-packed gratings for light extraction, broad band lambertian emitters are obtained due to the periodicity broadening and the random orientation in the gratings, resulting in enhancements in current and power efficiencies by a factor of 1.7 and 1.9, respectively.
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