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All-inorganic perovskite quantum dot light-emitting memories

Author

Listed:
  • Meng-Cheng Yen

    (National Taiwan Normal University)

  • Chia-Jung Lee

    (National Taiwan Normal University)

  • Kang-Hsiang Liu

    (National Taiwan Normal University)

  • Yi Peng

    (National Taiwan Normal University)

  • Junfu Leng

    (Kyushu University)

  • Tzu-Hsuan Chang

    (National Taiwan University)

  • Chun-Chieh Chang

    (National Taiwan Normal University)

  • Kaoru Tamada

    (Kyushu University
    Tohoku University)

  • Ya-Ju Lee

    (National Taiwan Normal University)

Abstract

Field-induced ionic motions in all-inorganic CsPbBr3 perovskite quantum dots (QDs) strongly dictate not only their electro-optical characteristics but also the ultimate optoelectronic device performance. Here, we show that the functionality of a single Ag/CsPbBr3/ITO device can be actively switched on a sub-millisecond scale from a resistive random-access memory (RRAM) to a light-emitting electrochemical cell (LEC), or vice versa, by simply modulating its bias polarity. We then realize for the first time a fast, all-perovskite light-emitting memory (LEM) operating at 5 kHz by pairing such two identical devices in series, in which one functions as an RRAM to electrically read the encoded data while the other simultaneously as an LEC for a parallel, non-contact optical reading. We further show that the digital status of the LEM can be perceived in real time from its emission color. Our work opens up a completely new horizon for more advanced all-inorganic perovskite optoelectronic technologies.

Suggested Citation

  • Meng-Cheng Yen & Chia-Jung Lee & Kang-Hsiang Liu & Yi Peng & Junfu Leng & Tzu-Hsuan Chang & Chun-Chieh Chang & Kaoru Tamada & Ya-Ju Lee, 2021. "All-inorganic perovskite quantum dot light-emitting memories," Nature Communications, Nature, vol. 12(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-24762-w
    DOI: 10.1038/s41467-021-24762-w
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    Cited by:

    1. Shuo Wang & Qian Zhao & Abhijit Hazarika & Simiao Li & Yue Wu & Yaxin Zhai & Xihan Chen & Joseph M. Luther & Guoran Li, 2023. "Thermal tolerance of perovskite quantum dots dependent on A-site cation and surface ligand," Nature Communications, Nature, vol. 14(1), pages 1-12, December.

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