Single crystals of caesium formamidinium lead halide perovskites: solution growth and gamma dosimetry

By O. Nazarenko, S. Yakunin, Viktoriia Morad, I. Cherniukh, M. Kovalenko. 2017

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Here we report an inexpensive, solution-phase growth of cm-scale single crystals of variable composition Cs x FA1−x PbI3−y Br y (FA=formamidinium, x=0–0.1, y=0–0.6), which exhibit improved phase stability compared to the parent α-FAPbI3 compound. High-carrier mobility–lifetime product of up to 1.2 × 10−1 cm2 V−1 and a low dark carrier density, combined with the high absorptivity of high-energy photons by Pb and I, allow the sensitive detection of gamma radiation. With stable operation up to 30 V, these novel perovskite materials have been used in a prototype of a gamma-counting dosimeter.

Subfields: Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/518e8049a40f39fc2fdfe123406fc2bdc642a095