Effect of Carrier Balance on Device Degradation of Organic Light-Emitting Diodes Based on Thermally Activated Delayed Fluorescence Emitters

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Abstract

The relatively short device lifetime of blue organic light-emitting diodes (OLEDs) when compared with the lifetimes of green and red OLEDs is one of the crucial problems that must be overcome to enable practical application of these devices to full-color OLED displays. This work focuses on the degradation phenomena of OLEDs that are based on sky-blue thermally activated delayed fluorescence emitters and clarifies the degradation mechanisms based on spectral change of the electroluminescence, which indicates the formation of electromer emission from an electron transport layer. Additionally, it is determined that the change in the carrier balance that occurs during this degradation process can be ascribed to the formation of electron traps.

Original languageEnglish
Article number1800708
JournalAdvanced Electronic Materials
Volume5
Issue number5
DOIs
Publication statusPublished - May 2019

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials

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