Science and Technology of Advanced Materials · 2014 · 68 citations · 14 references
Natural SciencesMaterials EngineeringMaterials ScienceElectronic MaterialsOptical MaterialsOptoelectronicsLight-emitting DiodesLuminescent MaterialsOptoelectronic DevicesOptoelectronic MaterialsOrganic Electronic MaterialsOrganic SemiconductorsBlue Light-emitting DiodesColor CoordinatesExternal Quantum EfficiencyFluorescent MaterialsHigh PerformanceOrientation FactorQuantum EfficiencyTriplet States
The authors applied two technologies to improve the efficiency of fluorescent blue organic light-emitting diodes (OLEDs). First, an efficiency-enhancement layer (EEL) was introduced to boost triplet-triplet fusion (TTF). Second, new blue dopants with a higher orientation factor in the emitting layer were developed. Consequently, the external quantum efficiency (EQE) was increased up to 11.5% with Commission Internationale de l'Eclairage (CIE) 1931 color coordinates of (0.138, 0.092). The reported results may lead to EQEs that exceed 14% with fluorescent blue emitters.
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Organic electroluminescent diodes
Chak Wah Tang, S. A. VanSlyke · Applied Physics Letters · 1987 · 14.3K citations
Natural Sciences, Materials Engineering, Materials Science +17