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Pure-blue tandem OLEDs based on terfluorenes compounds

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Abstract

We demonstrate a pure-blue tandem organic light-emitting devices (OLEDs) employing the blue fluorescent emitter, ter(9,9-phenylfluorene) fluoride (TPFF). The charge generation region consists of a Li-doped electron transport layer and a highly transparent WO3 thin film. Highly efficient pure-blue emission is obtained from the device. The maximum luminous efficiency of 2.08 cd/A with 1931 Commission Internationale De L’Eclairage coordinates of (0.156, 0.078) is obtained. The power efficiency of tandem device is also significantly enhanced as compared to the single-emissive unit device at high brightness. It is indicated that employing the tandem device structure is a promising route to achieving high brightness and efficient pure-blue emission.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China [No.90202034, No.60477014, and No.60577041] and 973 Project of China [No.2002CB613400].

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Authors and Affiliations

  1. School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, 221008, P.R. China

    Fuxiang Wei & L. Fang

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  1. Fuxiang Wei
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  2. L. Fang
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Correspondence to Fuxiang Wei.

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Wei, F., Fang, L. Pure-blue tandem OLEDs based on terfluorenes compounds. J Mater Sci: Mater Electron 19, 1202–1205 (2008). https://doi.org/10.1007/s10854-007-9528-6

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  • DOI: https://doi.org/10.1007/s10854-007-9528-6

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