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Self-powered perovskite photon-counting detectors

Author

Listed:
  • Ying Zhou

    (University of North Carolina at Chapel Hill)

  • Chengbin Fei

    (University of North Carolina at Chapel Hill)

  • Md Aslam Uddin

    (University of North Carolina at Chapel Hill)

  • Liang Zhao

    (University of North Carolina at Chapel Hill)

  • Zhenyi Ni

    (University of North Carolina at Chapel Hill)

  • Jinsong Huang

    (University of North Carolina at Chapel Hill
    University of North Carolina at Chapel Hill)

Abstract

Metal-halide perovskites (MHPs) have been successfully exploited for converting photons to charges or vice versa in applications of solar cells, light-emitting diodes and solar fuels1–3, for which all these applications involve strong light. Here we show that self-powered polycrystalline perovskite photodetectors can rival the commercial silicon photomultipliers (SiPMs) for photon counting. The photon-counting capability of perovskite photon-counting detectors (PCDs) is mainly determined by shallow traps, despite that deep traps also limit charge-collection efficiency. Two shallow traps with energy depth of 5.8 ± 0.8 millielectronvolts (meV) and 57.2 ± 0.1 meV are identified in polycrystalline methylammonium lead triiodide, which mainly stay at grain boundaries and the surface, respectively. We show that these shallow traps can be reduced by grain-size enhancement and surface passivation using diphenyl sulfide, respectively. It greatly suppresses dark count rate (DCR) from >20,000 counts per second per square millimetre (cps mm−2) to 2 cps mm−2 at room temperature, enabling much better response to weak light than SiPMs. The perovskite PCDs can collect γ-ray spectra with better energy resolution than SiPMs and maintain performance at high temperatures up to 85 °C. The zero-bias operation of perovskite detectors enables no drift of noise and detection property. This study opens a new application of photon counting for perovskites that uses their unique defect properties.

Suggested Citation

  • Ying Zhou & Chengbin Fei & Md Aslam Uddin & Liang Zhao & Zhenyi Ni & Jinsong Huang, 2023. "Self-powered perovskite photon-counting detectors," Nature, Nature, vol. 616(7958), pages 712-718, April.
  • Handle: RePEc:nat:nature:v:616:y:2023:i:7958:d:10.1038_s41586-023-05847-6
    DOI: 10.1038/s41586-023-05847-6
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    Cited by:

    1. Dou Zhao & Ruiling Gao & Wei Cheng & Mengyao Wen & Xinlei Zhang & Tomoyuki Yokota & Paul Sellin & Shengyuan A. Yang & Li Shang & Chongjian Zhou & Takao Someya & Wanqi Jie & Yadong Xu, 2024. "Heavy-to-light electron transition enabling real-time spectra detection of charged particles by a biocompatible semiconductor," Nature Communications, Nature, vol. 15(1), pages 1-12, December.
    2. Jincong Pang & Haodi Wu & Hao Li & Tong Jin & Jiang Tang & Guangda Niu, 2024. "Reconfigurable perovskite X-ray detector for intelligent imaging," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    3. Yao Ma & Leting Shan & Yiran Ying & Liang Shen & Yufeng Fu & Linfeng Fei & Yusheng Lei & Nailin Yue & Wei Zhang & Hong Zhang & Haitao Huang & Kai Yao & Junhao Chu, 2024. "Day-Night imaging without Infrared Cutfilter removal based on metal-gradient perovskite single crystal photodetector," Nature Communications, Nature, vol. 15(1), pages 1-11, December.

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