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Advanced Materials

Strong Luminescent Iridium Complexes with CˆN=N Structure in Ligands and Their Potential in Efficient and Thermally Stable Phosphorescent OLEDs

Authors

  • Bao Xiu Mi,

    1. Jiangsu Key Lab of Organic Electronics & Information Displays and Institute of Advanced Materials (IAM) Nanjing University of Posts and Telecommunications (NJUPT) Mailbox 386, No. 9 Wenyuan Road Yadong Xincheng Distribution Nanjing 210046 (PR China)
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  • Peng Fei Wang,

    1. Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beiyitiao No.2, Zhongguancun, Haidian District Beijing 100080 (PR China)
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  • Zhi Qiang Gao,

    Corresponding author
    1. Jiangsu Key Lab of Organic Electronics & Information Displays and Institute of Advanced Materials (IAM) Nanjing University of Posts and Telecommunications (NJUPT) Mailbox 386, No. 9 Wenyuan Road Yadong Xincheng Distribution Nanjing 210046 (PR China)
    • Jiangsu Key Lab of Organic Electronics & Information Displays and Institute of Advanced Materials (IAM) Nanjing University of Posts and Telecommunications (NJUPT) Mailbox 386, No. 9 Wenyuan Road Yadong Xincheng Distribution Nanjing 210046 (PR China).
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  • Chun Sing Lee,

    1. Center of Super-Diamond & Advanced Films (COSDAF) and Department of Physics and Materials Science City University of Hong Kong Tat Chee Avenue, Kowloon, Hong Kong (PR China)
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  • Shuit Tong Lee,

    Corresponding author
    1. Center of Super-Diamond & Advanced Films (COSDAF) and Department of Physics and Materials Science City University of Hong Kong Tat Chee Avenue, Kowloon, Hong Kong (PR China)
    • Center of Super-Diamond & Advanced Films (COSDAF) and Department of Physics and Materials Science City University of Hong Kong Tat Chee Avenue, Kowloon, Hong Kong (PR China).
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  • Hui Ling Hong,

    1. School of Chemistry and Chemical Engineering Sun Yat-Sen University, Guangzhou 510275 (PR China)
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  • Xiao Ming Chen,

    1. School of Chemistry and Chemical Engineering Sun Yat-Sen University, Guangzhou 510275 (PR China)
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  • Man Shing Wong,

    1. Centre for Advanced Luminescence Materials Waterloo Road, Kowloon Tong, Hong Kong (PR China)
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  • Ping Fang Xia,

    1. Centre for Advanced Luminescence Materials Waterloo Road, Kowloon Tong, Hong Kong (PR China)
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  • Kok Wai Cheah,

    1. Centre for Advanced Luminescence Materials Waterloo Road, Kowloon Tong, Hong Kong (PR China)
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  • Chin Hsin Chen,

    1. Display Institute, Microelectronics and Information Systems Research Center, National Chiao Tung University Hsinchu, Taiwan 300 (Taiwan)
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  • Wei Huang

    Corresponding author
    1. Jiangsu Key Lab of Organic Electronics & Information Displays and Institute of Advanced Materials (IAM) Nanjing University of Posts and Telecommunications (NJUPT) Mailbox 386, No. 9 Wenyuan Road Yadong Xincheng Distribution Nanjing 210046 (PR China)
    • Jiangsu Key Lab of Organic Electronics & Information Displays and Institute of Advanced Materials (IAM) Nanjing University of Posts and Telecommunications (NJUPT) Mailbox 386, No. 9 Wenyuan Road Yadong Xincheng Distribution Nanjing 210046 (PR China).
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  • This work was supported by Nanjing University of Posts and Telecommunications, nos. NY207162 and NY 207013, National Natural Science Fundation of China under grants 90406021 and 20574012. Supporting Information is available online from Wiley InterScience or from the author.

Abstract

Homoleptic iridium complexes with CˆN=N type ligands, i.e., 1,4-bis (phenyl) phthalazine (BPPa) and 3,6-bis(phenyl)pyridazine (BPPya), are strong phosphorescents, easy to synthesize, and thermally stable, thus having great potential in optical electronic applications, as demonstrated in Ir(BPPa)3-based OLED devices. A quantum chemistry study shows that CˆN=;N type ligands can bond to Ir more strongly.

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