High-Performance X-ray Detection Based on One-Dimensional Inorganic Halide Perovskite CsPbI3

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Abstract
Recently, the three-dimensional (3D) halide perovskites were considered as X-ray detection materials due to their high mobility, carrier lifetime and high absorption of X-ray radiation. However, their detection sensitivity and instability at extremely conditions/environments are still needed to optimize. In our present research work, we report using one-dimensional (1D) inorganic halide perovskite CsPbI3 crystals for stable X-ray detection. Remarkably, an X-ray detector made of CsPbI3 has an extremely high sensitivity of 2.37mC•Gy−1•cm−2, which is an order of magnitude higher than those using 3D halide perovskites reported previously. Extremely sensitive X-ray detection of CsPbI3 crystals is attributed to their high resistivity of 7.4×109 Ω•cm and large carrier mobility-life time product of 3.63×10−3 cm2•V−1. Our investigation demonstrates the quite promising applications of X-ray detectors made of the low dimensional perovskite crystals.
Funding Information
  • Ministry of Education of the People's Republic of China (3102018jcc036, 3102019TS0408)
  • Ministry of Science and Technology of the People's Republic of China (2016YFA0201104, 2016YFE0115200)
  • Natural Science Foundation of Jiangsu Province (BK20170482)
  • National Natural Science Foundation of China (51802262, 51872228, U1631116)
  • Natural Science Foundation of Shaanxi Province (2019JQ-459)
  • Natural Science Basic Research Plan in Shaanxi Province of China (2019ZDLGY04)

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