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Enhanced efficiency of top-emission InP-based green quantum dot light-emitting diodes with optimized angular distribution

Nano Research volume 14, pages 4243–4249 (2021)Cite this article

Abstract

High resolution and wide color gamut are two key requirements for novel display technologies. Owing to the distinguishing advantages over conventional displays, such as intrinsic wide color gamut and the possibility to achieve high resolution, quantum dot light-emitting diodes (QLED) have drawn considerable attention in recent years. On the other hand, indium phosphide quantum dots (InP QDs) have shown a great potential as a replacement for cadmium selenide (CdSe) QDs in display applications due to the inherent toxicity of cadmium-based QDs. In this study, we investigate a top-emission InP-based green QLED with optimized angular distribution. By adjusting the electrical and optical architecture, the device exhibits improved properties with a maximum current efficiency of 30.1 cd/A and a narrowed full width at half maxima (FWHM)of 31 nm, which are the best results ever reported to our knowledge.

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Acknowledgements

This work was supported by the National Key R&D Program of China under Grant No. 2016YFB0401700.

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Authors and Affiliations

  1. BOE Technology Group Co., Ltd., Beijing, 100176, China

    Dong Li, Jingwen Feng, Youqin Zhu, Zhigao Lu, Chen Pei, Zhuo Chen, Yanzhao Li, Xinguo Li & Xiaoguang Xu

Authors
  1. Dong Li
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  2. Jingwen Feng
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  3. Youqin Zhu
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  4. Zhigao Lu
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  5. Chen Pei
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  6. Zhuo Chen
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  7. Yanzhao Li
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  8. Xinguo Li
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  9. Xiaoguang Xu
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Correspondence to Zhuo Chen, Yanzhao Li, Xinguo Li or Xiaoguang Xu.

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Li, D., Feng, J., Zhu, Y. et al. Enhanced efficiency of top-emission InP-based green quantum dot light-emitting diodes with optimized angular distribution. Nano Res. 14, 4243–4249 (2021). https://doi.org/10.1007/s12274-021-3596-4

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  • DOI: https://doi.org/10.1007/s12274-021-3596-4

Keywords

  • Cd-free quantum dots
  • quantum dot light-emitting diode (QLED)
  • top-emission
  • angular distribution
  • current efficiency