Applied Physics Letters · 2009 · 42 citations · 20 references
Natural SciencesChemistryMaterials ScienceOrganic ChemistryOrganometallic ChemistryPhotonicsFluorescence SpectroscopyLight-emitting DiodesLuminescent MaterialsOrganic Electronic MaterialsOrganic SemiconductorsPhotochemistryBlue Light EmissionDoping ProfilesOrganic Light-emitting DiodesOrganic Phosphorescent MoleculesOrganic PhosphorsPhosphor MaterialsPhosphorescent MaterialsPhosphors
We demonstrate high-efficiency turquoise-blue electrophosphorescence from bis[3,5-bis(2-pyridyl)-1,2,4-triazolato]platinum(II) [Pt(ptp)2] doped in 4-(diphenylphosphoryl)-N,N-diphenylaniline(HM-A1). Organic light-emitting diodes (OLEDs) with 5% Pt(ptp)2:HM-A1 attain peak power efficiency of 61.2 lm/W, versus 40.8 lm/W for analogous devices employing the standard turquoise-blue phosphor bis[(4,6-difluorophenyl)-pyridinato-N,C2′](picolinato)iridium(III) (FIrpic). Devices with x% Pt(ptp)2:HM-A1 exhibit blue emission maxima (λmax∼480 nm) with monotonic increase in excimer/monomer intensity ratio at higher doping levels within 1%–10%, causing color shift toward green and less charge balance. This work represents a significant step toward optimizing future white OLEDs from the same phosphor via combination of low-doped and higher-doped or neat films.
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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
Highly efficient phosphorescent emission from organic electroluminescent devices
Marc A. Baldo, D. F. O’Brien, Yujian You et al. · Nature · 1998 · 7.2K citations