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Issue 44, 2018
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Lead-free halide double perovskite-polymer composites for flexible X-ray imaging

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Abstract

X-ray detectors are demonstrated using composite films of lead-free Cs2AgBiBr6 halide double perovskite embedded in a polymer matrix as the X-ray photoconductors. Polymers with hydroxyl functional groups greatly improve the uniformity of the composite films, and large area dense films are obtained using a simple drop-casting process. X-ray detectors based on the composite films exhibit a sensitivity of 40 μC Gyair−1 cm−2, comparable to the reported sensitivity using Cs2AgBiBr6 single crystals. Such detectors can also tolerate a 5% tensile/compressive strain in the composite films without performance degradation. Pixelated X-ray detectors fabricated on the same composite film can realize X-ray imaging and resolve a proof-of-concept geometric pattern.

Graphical abstract: Lead-free halide double perovskite-polymer composites for flexible X-ray imaging

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Publication details

The article was received on 04 Apr 2018, accepted on 06 Aug 2018 and first published on 07 Aug 2018


Article type: Communication
DOI: 10.1039/C8TC01564C
Citation: J. Mater. Chem. C, 2018,6, 11961-11967
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    Lead-free halide double perovskite-polymer composites for flexible X-ray imaging

    H. Li, X. Shan, J. N. Neu, T. Geske, M. Davis, P. Mao, K. Xiao, T. Siegrist and Z. Yu, J. Mater. Chem. C, 2018, 6, 11961
    DOI: 10.1039/C8TC01564C

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