Design Strategy for High-Performance Dendritic Carbazole-Containing Alkynylplatinum(II) Complexes and Their Application in Solution-Processable Organic Light-Emitting Devices
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- 作者：Fred Ka-Wai Kong ; Man-Chung Tang ; Yi-Chun Wong ; Mei-Yee Chan ; Vivian Wing-Wah Yam
- 刊名：Journal of the American Chemical Society
- 出版年：2016
- 出版时间：May 18, 2016
- 年：2016
- 卷：138
- 期：19
- 页码：6281-6291
- 全文大小：635K
- 年卷期：0
- ISSN：1520-5126
文摘
A new class of luminescent dendritic carbazole-containing alkynylplatinum(II) complexes has been synthesized, characterized, and applied as phosphorescent dopants in the fabrication of solution-processable organic light-emitting devices (OLEDs). These complexes exhibit high photoluminescence quantum yields of up to 80% in spin-coated thin films. In addition, the incorporation of carbazole dendrons into the platinum(II) center can significantly suppress intermolecular interactions in solid-state thin films, giving rise to emission spectra that are similar to those found in solution irrespective of dopant concentrations. High-performance solution-processable OLEDs have also been fabricated, with a maximum external quantum efficiency of up to 10.4%, which is comparable to that of the vacuum-deposited devices based on the small-molecule counterpart. This is one of the highest ever reported values for solution-processable devices based on platinum(II) complexes with tridentate ligands.