The working principle of hybrid perovskite gamma-ray photon counter

Fangze Liu; Michael Yoho; Hsinhan Tsai; Kasun Fernando; Jeremy Tisdale; Shreetu Shrestha; Jon K. Baldwin; Aditya D. Mohite; Sergei Tretiak; Duc T. Vo; Wanyi Nie

doi:10.1016/j.mattod.2020.02.022

The working principle of hybrid perovskite gamma-ray photon counter

Fangze Liu, Michael Yoho, Hsinhan Tsai, Kasun Fernando, Jeremy Tisdale, Shreetu Shrestha, Jon K. Baldwin, Aditya D. Mohite, Sergei Tretiak, Duc T. Vo, Wanyi Nie^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

Abstract

Gamma-ray spectroscopy that quantifies the gamma-ray energies is a critical technology widely needed in astrophysics, nuclear material detection and medical treatment. The key is to precisely count gamma-ray photons using sensitive detectors. In this paper, we investigate the operational principles of chlorine-doped methylammonium lead tribromide (MAPbBr₃₋_xCl_x) perovskite single crystal detectors that can efficiently count gamma-ray photon events with electrical pulses. Specifically, we find the main dark current originates from the thermally activated electron injection from the impurities, and using high work function contacts can block out the dark noise thus allows for efficient pulse collection at higher electrical fields ∼500 V/cm. As a result, we observe strong electrical pulses when exposing the detector under radioactive sources emitting gamma-ray photons at various energies. Our results also reveal the fundamental issues that prevent the reliable observation of photo-electric peak. This work suggest pathway towards energy resolved gamma-ray spectroscopy using perovskite crystal detectors.

Original language	English
Pages (from-to)	27-34
Number of pages	8
Journal	Materials Today
Volume	37
DOIs	https://doi.org/10.1016/j.mattod.2020.02.022
Publication status	Published - 1 Jul 2020
Externally published	Yes

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10.1016/j.mattod.2020.02.022

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title = "The working principle of hybrid perovskite gamma-ray photon counter",

abstract = "Gamma-ray spectroscopy that quantifies the gamma-ray energies is a critical technology widely needed in astrophysics, nuclear material detection and medical treatment. The key is to precisely count gamma-ray photons using sensitive detectors. In this paper, we investigate the operational principles of chlorine-doped methylammonium lead tribromide (MAPbBr3−xClx) perovskite single crystal detectors that can efficiently count gamma-ray photon events with electrical pulses. Specifically, we find the main dark current originates from the thermally activated electron injection from the impurities, and using high work function contacts can block out the dark noise thus allows for efficient pulse collection at higher electrical fields ∼500 V/cm. As a result, we observe strong electrical pulses when exposing the detector under radioactive sources emitting gamma-ray photons at various energies. Our results also reveal the fundamental issues that prevent the reliable observation of photo-electric peak. This work suggest pathway towards energy resolved gamma-ray spectroscopy using perovskite crystal detectors.",

author = "Fangze Liu and Michael Yoho and Hsinhan Tsai and Kasun Fernando and Jeremy Tisdale and Shreetu Shrestha and Baldwin, {Jon K.} and Mohite, {Aditya D.} and Sergei Tretiak and Vo, {Duc T.} and Wanyi Nie",

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doi = "10.1016/j.mattod.2020.02.022",

language = "English",

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T1 - The working principle of hybrid perovskite gamma-ray photon counter

AU - Liu, Fangze

AU - Yoho, Michael

AU - Tsai, Hsinhan

AU - Fernando, Kasun

AU - Tisdale, Jeremy

AU - Shrestha, Shreetu

AU - Baldwin, Jon K.

AU - Mohite, Aditya D.

AU - Tretiak, Sergei

AU - Vo, Duc T.

AU - Nie, Wanyi

PY - 2020/7/1

Y1 - 2020/7/1

N2 - Gamma-ray spectroscopy that quantifies the gamma-ray energies is a critical technology widely needed in astrophysics, nuclear material detection and medical treatment. The key is to precisely count gamma-ray photons using sensitive detectors. In this paper, we investigate the operational principles of chlorine-doped methylammonium lead tribromide (MAPbBr3−xClx) perovskite single crystal detectors that can efficiently count gamma-ray photon events with electrical pulses. Specifically, we find the main dark current originates from the thermally activated electron injection from the impurities, and using high work function contacts can block out the dark noise thus allows for efficient pulse collection at higher electrical fields ∼500 V/cm. As a result, we observe strong electrical pulses when exposing the detector under radioactive sources emitting gamma-ray photons at various energies. Our results also reveal the fundamental issues that prevent the reliable observation of photo-electric peak. This work suggest pathway towards energy resolved gamma-ray spectroscopy using perovskite crystal detectors.

AB - Gamma-ray spectroscopy that quantifies the gamma-ray energies is a critical technology widely needed in astrophysics, nuclear material detection and medical treatment. The key is to precisely count gamma-ray photons using sensitive detectors. In this paper, we investigate the operational principles of chlorine-doped methylammonium lead tribromide (MAPbBr3−xClx) perovskite single crystal detectors that can efficiently count gamma-ray photon events with electrical pulses. Specifically, we find the main dark current originates from the thermally activated electron injection from the impurities, and using high work function contacts can block out the dark noise thus allows for efficient pulse collection at higher electrical fields ∼500 V/cm. As a result, we observe strong electrical pulses when exposing the detector under radioactive sources emitting gamma-ray photons at various energies. Our results also reveal the fundamental issues that prevent the reliable observation of photo-electric peak. This work suggest pathway towards energy resolved gamma-ray spectroscopy using perovskite crystal detectors.

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SN - 1369-7021

VL - 37

SP - 27

EP - 34

JO - Materials Today

JF - Materials Today

ER -

The working principle of hybrid perovskite gamma-ray photon counter

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