Evaluation shows high external quantum efficiency of 25.6% in blue OLEDs using new p-type hosts, suggesting efficient design.
Three p‐type hosts with a high triplet energy (~3.06 eV) were synthesized and evaluated for thermally activated delayed fluorescence organic light‐emitting diodes. The three hosts were designed to have a high triplet energy and controlled intermolecular interactions through molecular distortion by introducing bulky blocking groups into the 3,3'‐bicarbazole core structure. The blue devices achieved a high external quantum efficiency of 25.6%.
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Lee et al. (2025) studied this question.
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