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| Research Progress on Application of Platinum Complex Phosphorescent Materials in OLED |
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| DOI： |
| KeyWord:Pt（Ⅱ） complexes phosphorescent material aggregation-induced emission organic light-emitting diode（OLED） |
| Author | Institution |
| ZHANG Yue-hua，FU Yu，SHEN Wen-yuan，NIE Fei，MU Ying-xiao，SUN Yu-xi，ZENG Qing-ming，HUO Yan-ping |
1. Guangzhou City Polytechnic，Guangzhou ，China; 2. School of Chemical Engineering and Light Industry，Guangdong University of Technology，Guangzhou ，China; 3. Guang Dong Shuo Cheng Science and Technology LTD，Guangzhou ，China |
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| Abstract: |
| A key breakthrough in the development and commercialization of organic light-emitting diodes（OLEDs） is to use phosphorescent substances as light-emitting materials，which have a threefold increase in internal quantum efficiency compared to fluorescent materials．Among all phosphorescent materials，square planar platinum（Ⅱ） complexes have such advantages，namely，high structural rigidity，superior phosphorescent quantum yield，short decay lifetime and good chemical and thermal stability，which are important for realizing long-lifetime phosphorescent OLEDs．Meanwhile，platinum（Ⅱ） complexes could easily construct bidentate，tridentate or tetradentate ligands due to their planar coordination geometry，which may significantly affect the photophysical properties of platinum（Ⅱ） complexes．In addition，the employment of multiple Pt centers could further enhance the spin-orbit coupling and thus enhance phosphorescence emission．Based on the above considerations，the application of mononuclear and polynuclear platinum（Ⅱ） complexes containing bidentate，tridentate and tetradentate ligands in OLED luminescent materials is summarized in this paper，and the influence of ligand structure on device performance is discussed．Finally，the future development of platinum（Ⅱ） complex materials is also prospected. |
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