High-Efficiency Polymer Light-Emitting Diodes with Stable Saturated Red Emission: Use of Carbazole-Based Copolymer Blends in a Poly(p-phenylenevinylene) Derivative

Authors

  • Y.-H. Niu,

  • J. Huang,

    1. Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou 510640 (People's Republic of China)
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  • Y. Cao

    1. Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou 510640 (People's Republic of China)
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  • This work was supported by the Natural Science Foundation of China under Project No. 29992530-6.

Abstract

High-efficiency red emission is a prerequisite for full-color display applications of light-emitting diodes. The devices reported here—with stable external quantum efficiency up to 3.8 (photons/electron)-%—have a light-emitting layer consisting of a blend of a novel carbazole-based copolymer (see Figure) in MEHPPV, a more conventional conjugated polymer, as host.

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