High-Efficiency White-Light-Emitting Devices from a Single Polymer by Mixing Singlet and Triplet Emission

Authors

  • J. X. Jiang,

    1. Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Key Laboratory of Specially Functional Materials and Advanced Manufacturing Technology, Guangzhou 510640, P.R. China
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  • Y. H. Xu,

    1. Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Key Laboratory of Specially Functional Materials and Advanced Manufacturing Technology, Guangzhou 510640, P.R. China
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  • W. Yang,

    1. Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Key Laboratory of Specially Functional Materials and Advanced Manufacturing Technology, Guangzhou 510640, P.R. China
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  • R. Guan,

    1. Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Key Laboratory of Specially Functional Materials and Advanced Manufacturing Technology, Guangzhou 510640, P.R. China
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  • Z. Q. Liu,

    1. Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Key Laboratory of Specially Functional Materials and Advanced Manufacturing Technology, Guangzhou 510640, P.R. China
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  • H. Y. Zhen,

    1. Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Key Laboratory of Specially Functional Materials and Advanced Manufacturing Technology, Guangzhou 510640, P.R. China
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  • Y. Cao

    1. Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Key Laboratory of Specially Functional Materials and Advanced Manufacturing Technology, Guangzhou 510640, P.R. China
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  • The authors are grateful to the Ministry of Science and Technology of China (No. 2002CB613403) and the National Natural Science Foundation of China (No. 50173008, No. 20574021) for their financial support of our work.

Abstract

original image

Efficient and almost pure white-light emission is obtained by combining singlet and triplet emission in a single-polymer device. The polymers used in this work include a benzothiadiazole group attached to a fluorene backbone and an iridium complex attached to the side chain (see figure). White-light emission with CIE color coordinates of (0.32, 0.44) and a luminance efficiency of 6.1 cd A–1 is obtained.

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