Design and Synthesis of Iridium Bis(carbene) Complexes for Efficient Blue Electrophosphorescence (pages 9180–9187)
Dr. Cheng-Han Hsieh, Dr. Fang-Iy Wu, Chun-Hsiang Fan, Min-Jie Huang, Kun-Yi Lu, Pei-Yu Chou, Yu-Han Ou Yang, Shih-Hsiang Wu, Prof. Dr. I-Chia Chen, Shu-Hua Chou, Prof. Dr. Ken-Tsung Wong and Prof. Dr. Chien-Hong Cheng
Version of Record online: 5 JUL 2011 | DOI: 10.1002/chem.201100317
Simple and effective! Experimental and theoretical studies show that the emissive state of the iridium complexes (see figure) is mainly controlled by the single conjugated N,N′-heteroaromatic ligand. Their emission color can be systematically tuned from light to deep blue by simple ligand modulation. The blue electrophosphorescent devices using these complexes as the emitter show very high external quantum efficiencies of 7.6–15.2 %.