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Large cation ethylammonium incorporated perovskite for efficient and spectra stable blue light-emitting diodes

Author

Listed:
  • Zema Chu

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Yang Zhao

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Fei Ma

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Cai-Xin Zhang

    (Chinese Academy of Sciences)

  • Huixiong Deng

    (University of Chinese Academy of Sciences
    Chinese Academy of Sciences)

  • Feng Gao

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Qiufeng Ye

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Junhua Meng

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Zhigang Yin

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Xingwang Zhang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Jingbi You

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

Abstract

Perovskite light-emitting diodes (PeLEDs) have showed significant progress in recent years; the external quantum efficiency (EQE) of electroluminescence in green and red regions has exceeded 20%, but the efficiency in blue lags far behind. Here, a large cation CH3CH2NH2+ is added in PEA2(CsPbBr3)2PbBr4 perovskite to decrease the Pb–Br orbit coupling and increase the bandgap for blue emission. X-ray diffraction and nuclear magnetic resonance results confirmed that the EA has successfully replaced Cs+ cations to form PEA2(Cs1-xEAxPbBr3)2PbBr4. This method modulates the photoluminescence from the green region (508 nm) into blue (466 nm), and over 70% photoluminescence quantum yield in blue is obtained. In addition, the emission spectra is stable under light and thermal stress. With configuration of PeLEDs with 60% EABr, as high as 12.1% EQE of sky-blue electroluminescence located at 488 nm has been demonstrated, which will pave the way for the full color display for the PeLEDs.

Suggested Citation

  • Zema Chu & Yang Zhao & Fei Ma & Cai-Xin Zhang & Huixiong Deng & Feng Gao & Qiufeng Ye & Junhua Meng & Zhigang Yin & Xingwang Zhang & Jingbi You, 2020. "Large cation ethylammonium incorporated perovskite for efficient and spectra stable blue light-emitting diodes," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-17943-6
    DOI: 10.1038/s41467-020-17943-6
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    Cited by:

    1. Zhenchao Li & Ziming Chen & Zhangsheng Shi & Guangruixing Zou & Linghao Chu & Xian-Kai Chen & Chujun Zhang & Shu Kong So & Hin-Lap Yip, 2023. "Charge injection engineering at organic/inorganic heterointerfaces for high-efficiency and fast-response perovskite light-emitting diodes," Nature Communications, Nature, vol. 14(1), pages 1-11, December.

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