Efficient Red-Emitting Platinum Complex with Long Operational Stability
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- 作者：Tyler Fleetham ; Guijie Li ; Jian Li
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2015
- 出版时间：August 5, 2015
- 年：2015
- 卷：7
- 期：30
- 页码：16240-16246
- 全文大小：405K
- ISSN：1944-8252
文摘
A tetradentate cyclometalated Pt(II) complex, PtN3N-ptb, was developed as an emissive dopant for stable and efficient red phosphorescent OLEDs. Devices employing PtN3N-ptb in electrochemically stable device architectures achieved long operational lifetimes with estimated LT97, of over 600 h at luminances of 1000 cd/m2. Such long operational lifetimes were achieved utilizing only literature reported host, transporting and blocking materials with known molecular structures. Additionally, a thorough study of the effects of various host and transport materials on the efficiency, turn on voltage, and stability of the devices was carried out. Ultimately, maximum forward viewing EQEs as high as 21.5% were achieved, demonstrating that Pt(II) complexes can act as stable and efficient dopants with operational lifetimes comparable or superior to those of the best literature-reported Ir(III) complexes.