Abstract
AbstractOrganic light‐emitting diodes (OLEDs) receive considerable attention because of their commercial use in flat panel displays. Herein, highly efficient spiroborate‐based host materials are reported for use in blue OLEDs. Our designed spiroborates (SBOX) were simple to synthesize and exhibited high triplet excitation energies, narrow S‐T gaps, and balanced charge carrier mobilities. A blue OLED containing one of the designed spiroborates, SBON, as a host exhibited a high external quantum efficiency (27.6 %) and low turn‐on voltage (3.7 V) compared to those observed using 3,3′‐di(9H‐carbazol‐9‐yl)‐1,1′‐biphenyl (17.6 % and 4.5 V, respectively), indicating their potential as host materials in OLEDs.
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