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Efficient sky‐blue organic light‐emitting diodes (OLEDs) employing thermally activated delayed fluorescence (TADF) display a three orders of magnitude increase in lifetime, which is superior to those of controlled phosphorescent OLEDs used in this study. The combination of electro‐oxidation and photo‐oxidation of the TADF emitters in their triplet excited‐states is suppressed through molecule design...
The combination of electrooxidation and photooxidation efficiently decomposes the high‐energy triplets of emitters, which is the main reason for the unavailablilty of stable blue thermally activated delayed fuorescence (TADF) OLEDs. The lightning represents photooxidation and the stream represents electrooxidation. The process of electrooxidation and photooxidation in TADF emitters can be suppressed...
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