Organic Light-Emitting Diodes: Achieving Nearly 30% External Quantum Efficiency for Orange–Red Organic Light Emitting Diodes by Employing Thermally Activated Delayed Fluorescence Emitters Composed of 1,8-Naphthalimide-Acridine Hybrids (Adv. Mater. 5/2018)

In article number 1704961, Shaolong Gong, Chung-Chih Wu, Chuluo Yang, and co-workers present orange-red organic light-emitting diodes (OLEDs) with external quantum efficiencies of up to 29.2% through employing thermally activated delayed fluorescence emitters of a 1,8-naphthalimide–acridine hybrid. The relatively high photoluminescence quantum yield and horizontally oriented emitting dipoles of these emitters combined with the influence of the microcavity effect are verified to support the record-high efficiency.

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