Synthesis of Unsymmetric Bipyridine–PtII–Alkynyl Complexes through Post‐Click Reaction with Emission Enhancement Characteristics and Their Applications as Phosphorescent Organic Light‐Emitting Diodes |
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| Authors: | Dr Yongguang Li Dr Daniel Ping‐Kuen Tsang Dr Carmen Ka‐Man Chan Dr Keith Man‐Chung Wong Dr Mei‐Yee Chan Prof?Dr Vivian Wing‐Wah Yam |
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| Affiliation: | Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee, Hong Kong) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong (P.R. China), Fax: (+852)?2857‐1586 |
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| Abstract: | Two unsymmetric bipyridine–platinum(II)–alkynyl complexes have been synthesised by a post‐click reaction. These metal complexes are found to exhibit emission enhancement properties. The photoluminescence quantum yield can be significantly increased from 0.03 in solution to 0.72 in solid‐state thin films. Efficient solution‐processable organic light‐emitting diodes have been fabricated by utilizing these complexes as phosphorescent dopants. A high external quantum efficiency of up to 5.8 % has been achieved. |
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| Keywords: | aggregation enhanced emission click reactions organic light‐emitting devices photophysics platinum |
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