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Memory phototransistors based on exponential-association photoelectric conversion law

Author

Listed:
  • Zhibin Shao

    (Soochow University)

  • Tianhao Jiang

    (Soochow University)

  • Xiujuan Zhang

    (Soochow University)

  • Xiaohong Zhang

    (Soochow University)

  • Xiaofeng Wu

    (Soochow University)

  • Feifei Xia

    (Jiangsu University of Technology)

  • Shiyun Xiong

    (Soochow University)

  • Shuit-Tong Lee

    (Soochow University)

  • Jiansheng Jie

    (Soochow University)

Abstract

Ultraweak light detectors have wide-ranging important applications such as astronomical observation, remote sensing, laser ranging, and night vision. Current commercial ultraweak light detectors are commonly based on a photomultiplier tube or an avalanche photodiode, and they are incompatible with microelectronic devices for digital imaging applications, because of their high operating voltage and bulky size. Herein, we develop a memory phototransistor for ultraweak light detection, by exploiting the charge-storage accumulative effect in CdS nanoribbon. The memory phototransistors break the power law of traditional photodetectors and follow a time-dependent exponential-association photoelectric conversion law. Significantly, the memory phototransistors exhibit ultrahigh responsivity of 3.8 × 109 A W−1 and detectivity of 7.7 × 1022 Jones. As a result, the memory phototransistors are able to detect ultraweak light of 6 nW cm−2 with an extremely high sensitivity of 4 × 107. The proposed memory phototransistors offer a design concept for ultraweak light sensing devices.

Suggested Citation

  • Zhibin Shao & Tianhao Jiang & Xiujuan Zhang & Xiaohong Zhang & Xiaofeng Wu & Feifei Xia & Shiyun Xiong & Shuit-Tong Lee & Jiansheng Jie, 2019. "Memory phototransistors based on exponential-association photoelectric conversion law," Nature Communications, Nature, vol. 10(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-09206-w
    DOI: 10.1038/s41467-019-09206-w
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    Cited by:

    1. Jing Pan & Yiming Wu & Xiujuan Zhang & Jinhui Chen & Jinwen Wang & Shuiling Cheng & Xiaofeng Wu & Xiaohong Zhang & Jiansheng Jie, 2022. "Anisotropic charge trapping in phototransistors unlocks ultrasensitive polarimetry for bionic navigation," Nature Communications, Nature, vol. 13(1), pages 1-11, December.

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