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Org Lett. 2014 Oct 17;16(20):5346-9. doi: 10.1021/ol502531y. Epub 2014 Sep 26.

Ideal bipolar host materials with bis-benzimidazole unit for highly efficient solution-processed green electrophosphorescent devices.

Organic letters

Wei Jiang, Jinan Tang, Xinxin Ban, Yueming Sun, Lian Duan, Yong Qiu

Affiliations

  1. School of Chemistry and Chemical Engineering, Southeast University , Nanjing, Jiangsu 211189, P. R. China.

PMID: 25260110 DOI: 10.1021/ol502531y

Abstract

An ideal host material with high triplet energy, suitable HOMO energy level, excellent thermal and electrochemical stability, and bipolar charge carrier transport ability was synthesized. A high external quantum efficiency of 13.7% and a luminance efficiency of 48.2 cd A(-1) with low efficiency roll-off were achieved in solution-processed green electrophosphorescent devices.

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