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- W1179883357 abstract "Utilizing triplet excitons to produce photons is a key factor to maximize the efficiency of fluorescent organic LEDs. In these devices, quantum efficiency is influenced by various mechanisms such as triplet–triplet annihilation, triplet–polaron quenching, and singlet–triplet quenching. In this article, the role of triplet excitons in altering the quantum efficiency is discussed for various excitonic processes rates as well as charge carrier mobilities and injection energy barriers. It is shown that the contribution of triplet excitons to the efficiency turns from positive to negative by increasing the current density above a critical current level that is itself a function of material and device parameters. Particularly, it is shown that at low current densities, triplets contribute to the efficiency up to 60%, however by increasing the charge carrier density in the emission layer, this positive contribution drastically decreases." @default.
- W1179883357 created "2016-06-24" @default.
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- W1179883357 date "2015-08-04" @default.
- W1179883357 modified "2023-09-24" @default.
- W1179883357 title "Contribution of triplet excitons to the efficiency of fluorescent organic light emitting diodes" @default.
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- W1179883357 doi "https://doi.org/10.7567/jjap.54.094301" @default.
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