Applied Physics Letters · 2008 · 62 citations · 13 references
Efficiency Roll-offEngineeringOrganic ElectronicsTriplet-polaron QuenchingOptoelectronic DevicesChemistryPhosphorescence ImagingElectronic DevicesPhotodetectorsLight-emitting DiodesThermally Activated Delayed FluorescenceElectrical EngineeringUltrahigh Current DensitiesHigh MobilityOptoelectronic MaterialsOrganic SemiconductorNew Lighting TechnologyMaximum LuminescenceOrganic MaterialsOrganic Charge-transfer CompoundWhite OledElectronic MaterialsApplied PhysicsOptoelectronics
High-performance phosphorescent organic light emitting devices with reduced efficiency roll-off at ultrahigh current densities were realized. The devices were Ir(ppy)3-based phosphorescent organic light emitting diodes that employed 1,3-bis[2-(2,2′-bipyridine-6-yl)-1,3,4-oxadiazo-5-yl]benzene as a high mobility electron transfer layer. The device’s brightness was enhanced while the efficiency roll-off was reduced. The device exhibits high current efficiency (21cd∕A) at high brightness (80000cd∕m2), with a maximum luminescence of 136000cd∕m2 at over 1A∕m2 (with an efficiency of 13cd∕A). This reduction in efficiency roll-off is attributed to the suppression of the triplet-polaron quenching rate through balancing the charge carrier ratio in the device.
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Highly efficient phosphorescent emission from organic electroluminescent devices
Marc A. Baldo, D. F. O’Brien, Yujian You et al. · Nature · 1998 · 7.1K citations
White Oled, Organic Electroluminescent Devices, Chemistry +3
Management of singlet and triplet excitons for efficient white organic light-emitting devices
Yiru Sun, Noel C. Giebink, Hiroshi Kanno et al. · Nature · 2006 · 2.3K citations · Full text