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Determination of X-ray detection limit and applications in perovskite X-ray detectors.

ABSTRACT: X-ray detection limit and sensitivity are important figure of merits for perovskite X-ray detectors, but literatures lack a valid mathematic expression for determining the lower limit of detection for a perovskite X-ray detector. In this work, we present a thorough analysis and new method for X-ray detection limit determination based on a statistical model that correlates the dark current and the X-ray induced photocurrent with the detection limit. The detection limit can be calculated through the measurement of dark current and sensitivity with an easy-to-follow practice. Alternatively, the detection limit may also be obtained by the measurement of dark current and photocurrent when repeatedly lowering the X-ray dose rate. While the material quality is critical, we show that the device architecture and working mode also have a significant influence on the sensitivity and the detection limit. Our work establishes a fair comparison metrics for material and detector development.

SUBMITTER: Pan L

PROVIDER: S-EPMC8421435 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature

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Determination of X-ray detection limit and applications in perovskite X-ray detectors.

Pan Lei L Shrestha Shreetu S Taylor Neil N Nie Wanyi W Cao Lei R LR

Nature communications 20210906 1

X-ray detection limit and sensitivity are important figure of merits for perovskite X-ray detectors, but literatures lack a valid mathematic expression for determining the lower limit of detection for a perovskite X-ray detector. In this work, we present a thorough analysis and new method for X-ray detection limit determination based on a statistical model that correlates the dark current and the X-ray induced photocurrent with the detection limit. The detection limit can be calculated through t ...[more]

PMID: 34489444

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