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High-efficiency saturated red emission from binuclear cyclo-metalated platinum complex containing 5-(4-octyloxyphenyl)-1,3,4-oxadiazole-2-thiol ancillary ligand in PLED

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Abstract

A novel red-emitting binuclear platinum complex (dfppy)2Pt2(C8OXT)2 was synthesized and characterized, in which dfppy represents 2-(4′,6′-difluorophenyl)pyridinato unit and C8OXT is abbreviated for 5-(4-octyloxyphenyl)-1,3,4-oxadiazole-2-thiol as a bridging ancillary ligand. Its photophysical, electrochemical and electroluminescent characteristics were primarily studied. The made single-emissive-layer (SEL) polymer light-emitting devices using (dfppy)2Pt2(C8OXT)2 as emitter exhibited a saturated red emission peaked at 620 nm. The best device performances were obtained in the device at 8 wt% dopant concentration, with a maximum external quantum efficiency of 8.4%, a current efficiency of 4.2 cd/A and brightness of 3228 cd/m2. This work provides an effective approach to obtain high-efficiency red emission through construction of new binuclear platinum complex and its doped SEL devices.

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Authors and Affiliations

  1. Key laboratory of Environment-Friendly Chemistry and Application, Ministry of Education; College of Chemistry, Xiangtan University, Xiangtan, 411105, China

    JunTing Yu, XiuGang Wu, Hua Tan, Yu Liu, YaFei Wang, MeiXiang Zhu & WeiGuo Zhu

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  1. JunTing Yu
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  2. XiuGang Wu
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  3. Hua Tan
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  4. Yu Liu
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  5. YaFei Wang
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  6. MeiXiang Zhu
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  7. WeiGuo Zhu
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Correspondence to Yu Liu or WeiGuo Zhu.

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Recommended by QIU Yong (Tsinghua University)

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Yu, J., Wu, X., Tan, H. et al. High-efficiency saturated red emission from binuclear cyclo-metalated platinum complex containing 5-(4-octyloxyphenyl)-1,3,4-oxadiazole-2-thiol ancillary ligand in PLED. Sci. China Chem. 56, 1137–1142 (2013). https://doi.org/10.1007/s11426-013-4872-2

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