Prof. Harald Hillebrecht Profile

Prof. Harald Hillebrecht

at FMF - Freiburger Materialforschungszentrum

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Proceedings Article | 4 October 2023 Presentation

All-inorganic Cs2AgBiBr6 double perovskite single crystals for radiation detectors

Michael Fiederle, Simay Sahsuvar, Harald Hillebrecht, Michael Daub, Catharine Schweinle

Proceedings Volume PC12696, PC1269603 (2023) https://doi.org/10.1117/12.2679710

KEYWORDS: Crystals, Perovskite, X-rays, Sensors, Optical properties

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Inorganic double perovskite single crystals e.g. Cs2AgBiBr6 have great potential in detecting X- and Gamma-Radiation. These single crystals can be solution processed at low temperature and be possessing of low trap density, high charge carrier mobility, and a tunable bandgap. In this work, Cs2AgBiBr6 single crystals were synthesized using the solution growth method, and we tried to determine the potential of detecting X-Ray radiation by examining especially their electrical and optical properties. Besides that, the values determined by the IV measurement along the dominant {001} lattice plane (1.02x108 – 2.97x109 Ωcm) and the van der Paul measurements made along the trigonal upper surface and pseudo-hexagonal lower surface edges (2.88X109 – 4.39x1010 Ωcm) used for specifically demonstrate the correlation between structure and property. The density of trap states and charge-carrier mobilities, which were calculated from the IV characteristic curve measurements, are 4.44x109 – 6.79x1010 cm–3 and 0.07-24.4 cm2V–1s–1, respectively. Consequently, it has been seen that these crystals obtained by the solution growth method are suitable for use in radiation sensors applications.

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