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A sensitive and robust thin-film x-ray detector using 2D layered perovskite diodes.

ABSTRACT: Solid-state radiation detectors, using crystalline semiconductors to convert radiation photons to electrical charges, outperform other technologies with high detectivity and sensitivity. Here, we demonstrate a thin-film x-ray detector comprised with highly crystalline two-dimensional Ruddlesden-Popper phase layered perovskites fabricated in a fully depleted p-i-n architecture. It shows high diode resistivity of 1012 ohm·cm in reverse-bias regime leading to a high x-ray detecting sensitivity up to 0.276 C Gyair -1 cm-3. Such high signal is collected by the built-in potential underpinning operation of primary photocurrent device with robust operation. The detectors generate substantial x-ray photon-induced open-circuit voltages that offer an alternative detecting mechanism. Our findings suggest a new generation of x-ray detectors based on low-cost layered perovskite thin films for future x-ray imaging technologies.

SUBMITTER: Tsai H

PROVIDER: S-EPMC7148088 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature

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A sensitive and robust thin-film x-ray detector using 2D layered perovskite diodes.

Tsai Hsinhan H Liu Fangze F Shrestha Shreetu S Fernando Kasun K Tretiak Sergei S Scott Brian B Vo Duc Ta DT Strzalka Joseph J Nie Wanyi W

Science advances 20200410 15

Solid-state radiation detectors, using crystalline semiconductors to convert radiation photons to electrical charges, outperform other technologies with high detectivity and sensitivity. Here, we demonstrate a thin-film x-ray detector comprised with highly crystalline two-dimensional Ruddlesden-Popper phase layered perovskites fabricated in a fully depleted p-i-n architecture. It shows high diode resistivity of 1012 ohm·cm in reverse-bias regime leading to a high x-ray d ...[more]

PMID: 32300647

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