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- W2067324897 abstract "Electroluminescence (EL) from organic light-emitting diodes can be surprisingly sensitive (∼20%) to modest magnetic fields B (0–2T). The origin of this magnetic-field effect has not been clearly identified, although the magnetic-field effect in some devices resembles that of delayed fluorescence in anthracene, which originates from magnetic-field-dependent singlet-exciton production via triplet-triplet annihilation (TTA). Here, we test the role of TTA at low magnetic fields (∼80mT) by measuring transient EL and by employing dc drive levels so low that the bimolecular rate of TTA is unimportant. Under these conditions, we find enhancements of EL exceeding 14% at the lowest drives, which excludes TTA-mediated magnetic-field effects and indicates a role for charge-carrier pair states." @default.
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- W2067324897 date "2005-03-14" @default.
- W2067324897 modified "2023-09-29" @default.
- W2067324897 title "Evidence for charge-carrier mediated magnetic-field modulation of electroluminescence in organic light-emitting diodes" @default.
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- W2067324897 doi "https://doi.org/10.1063/1.1883322" @default.
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