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- W1981507923 abstract "Organic light-emitting diodes (OLEDs) are a rapidly developing technology with high innovation potential for displays, lighting, and further applications. Critical issues for current research remain the extension of lifetimes and, related to this aim, a deeper understanding of degradation processes in OLEDs. In the present work, we used the charge-based deep level transient spectroscopy technique to investigate changes in the charge transport in OLEDs induced by electrical aging. Both trap states capturing electrons and holes, respectively, were detected. Temperature-dependent measurements enabled estimating the depth of the trap states for electrons. Comparison of spectra of electrically aged and undriven devices revealed that aging seemed to increase the density of traps but did not lead to the occurrence of new types of trap states. Furthermore, experiments with different voltage pulses to fill the charge carrier trap states allowed conclusions on age-induced changes of the injection barrier for holes." @default.
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- W1981507923 date "2013-01-14" @default.
- W1981507923 modified "2023-09-27" @default.
- W1981507923 title "Charge transport properties in electrically aged organic light-emitting diodes" @default.
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- W1981507923 doi "https://doi.org/10.1063/1.4774409" @default.
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