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Deep-blue efficient OLED based on NPB with little efficiency roll-off under high current density

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Abstract

NPB usually is used as a hole-transport layer in OLED. In fact, it is a standard pure blue-emission material. However, its light-emitting efficiency in OLED is low due to emissive nature of organic material. Herein, a deep-blue OLDE based on NPB was fabricated. The light-emitting efficiency of the device demonstrates a moderate value, and efficiency roll-off is little under high current density. The device demonstrates that the electroplex’s emission decreases with increasing electric field intensity.

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Acknowledgements

This work was financially supported by the National Nature Science Foundation of China (Grant No. 21562042) and the Research Foundation of Education Department of Jiangxi Province, China (Grant No. GJJ151219). Author thanks Prof. Dong-Ge Ma (State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences) for the testing help of device’s performance.

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Authors and Affiliations

  1. School of New Energy Science and Engineering, Xinyu University, Xinyu, 338004, China

    Jian Liu

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  1. Jian Liu
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Correspondence to Jian Liu.

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Liu, J. Deep-blue efficient OLED based on NPB with little efficiency roll-off under high current density. Appl. Phys. A 123, 191 (2017). https://doi.org/10.1007/s00339-017-0840-6

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  • DOI: https://doi.org/10.1007/s00339-017-0840-6

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