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Controllably Tuning Excited-State Energy in Ternary Hosts for Ultralow-Voltage-Driven Blue Electrophosphorescence

Authors

  • Chunmiao Han,

    1. Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, 74 Xuefu Road, Harbin 150080 (P. R. China)
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  • Zhensong Zhang,

    1. State Key Laboratory on Integrated Optoelectronics, College of Electronics Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012 (P. R. China)
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  • Dr. Hui Xu,

    Corresponding author
    1. Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, 74 Xuefu Road, Harbin 150080 (P. R. China)
    • Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, 74 Xuefu Road, Harbin 150080 (P. R. China)
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  • Jing Li,

    1. Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, 74 Xuefu Road, Harbin 150080 (P. R. China)
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  • Dr. Guohua Xie,

    1. State Key Laboratory on Integrated Optoelectronics, College of Electronics Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012 (P. R. China)
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  • Dr. Runfeng Chen,

    1. Key Laboratory for Organic Electronics and Information Displays (KOLED), Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing 210046 (China)
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  • Prof. Yi Zhao,

    Corresponding author
    1. State Key Laboratory on Integrated Optoelectronics, College of Electronics Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012 (P. R. China)
    • State Key Laboratory on Integrated Optoelectronics, College of Electronics Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012 (P. R. China)
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  • Prof. Wei Huang

    1. Key Laboratory for Organic Electronics and Information Displays (KOLED), Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing 210046 (China)
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  • C.H. and Z.Z. contributed equally to this work. This work was financially supported by the National Key Basic Research and Development Program of China (2010CB327701), NSFC (50903028, 61176020, and 60977024), Key Project of Ministry of Education (212039), New Century Talents Developing Program of Heilongjiang Universities (1252-NCET-005), Education Bureau of Heilongjiang province (2010td03), and Heilongjiang University (2010hdtd-08). C.H. thanks the support of the Postgraduate Innovation Funds of Heilongjiang Province and Heilongjiang University. H.X. thanks the kind help of Dr. Chao Zheng for DFT calculations.

Abstract

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A series of dibenzofuran-based ternary hosts were designed and prepared. The singlet energy levels and carrier injecting/transporting abilities were adjusted on the basis of the mixed meso and short-axis linkages (see picture). By harmonizing the optical and electrical properties, the blue-emitting diodes realized highly efficient blue electrophosphorescence with ultralow driving voltages.

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