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- W2000368240 abstract "Phosphorescent organic light-emitting diodes (PHOLEDs) with an emitting layer of 4,4′-N,N′-dicarbazole-biphenyl codoped with phosphor fac -tri(phenylpyridine)iridium(III) [Ir(ppy) 3 ] and fluorophore N,N’-dimethy-quinacridone (DMQA) are investigated. Predominant emission from DMQA due to the efficient energy transfer from Ir(ppy) 3 to DMQA is observed. Such an energy transfer results in the transition of Ir(ppy) 3 triplet to DMQA singlet, which reduces the Ir(ppy) 3 exciton lifetime and hence suppresses the triplet–triplet annihilation and triplet-polaron annihilation of Ir(ppy) 3 excitons, leading to dramatical reduction of the efficiency roll-off of the PHOLEDs. This transition of triplet to singlet strategy provides a method to improve the efficiency roll-off of the PHOLEDs." @default.
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- W2000368240 date "2011-02-01" @default.
- W2000368240 modified "2023-10-18" @default.
- W2000368240 title "Triplet to singlet transition induced low efficiency roll-off in green phosphorescent organic light-emitting diodes" @default.
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- W2000368240 doi "https://doi.org/10.1016/j.tsf.2010.12.008" @default.
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