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Dendritic Self-Host Phosphorescent Iridium Materials for High-Efficiency Organic Light-Emitting Diodes

[ Vol. 22 , Issue. 6 ]

Author(s):

Chuang Yao*, Cuifeng Jiang and Jinshan Wang*   Pages 590 - 599 ( 10 )

Abstract:


Background: Dendritic self-host phosphorescent Iridium materials, which generally consist of an Iridium light-emitting core, dendrons(branches) and surface groups, are a kind of novel and effective triplet emission materials for non-doped solutionprocessed organic light-emitting diodes (OLEDs).

Methodology: Iridium light-emitting cores can harvest singlet and triplet excitons to obtain a theoretical internal quantum efficiency of 100% and can be chosen to determine key photoelectric properties, such as color of light emission. Peripheral dendrons can act as a host of an emissive core. The shielding effect can also reduce or eliminate the interactions between the emitting phosphors and prevent luminance quenching.

Conclusion: Surface groups can provide suitable solubility for dendrimers in organic solvents. Therefore, phosphorescent dendrimers are applicable to highly efficient self-host solution-processed OLEDs.

Keywords:

Dendrimer, phosphorescent iridium materials, nondoped, self-host, organic light-emitting diodes, solution-process.

Affiliation:

Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology (EBEAM) Chongqing, College of Mechanical and Electrical Engineering, Yangtze Normal University, Chongqing, 408100, School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng, 224051, School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng, 224051

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