Proceedings of nanoGe Fall Meeting19 (NFM19)
DOI: https://doi.org/10.29363/nanoge.nfm.2019.235
Publication date: 18th July 2019
Hybrid halide perovskites are promising materials for application in solar cells, but also for a range of other applications such as in photodetectors, light-emitting diodes and lasers. In this work we have studied the conductive properties of 3D and 2D halide perovskites by using high energy radiation in the so-called pulse radiolysis time-resolved microwave conductivity technique. In this technique, materials are irradiated with high enery electrons and the change in conductivity is monitored on a nanosecond time-scale by microwave absorption. In this work we show that pulsed irradiation of perovskites leads to a high, long-lived conductivity response that is a result of the large concentration of charge generated due to the heavy Pb component, a large dielectric screening and a high charge carrier mobility. This makes these materials potentials candidates for application in fast sensitive radiation detectors. We show that the radiation induced conductivity has a significant dependence on the composition of the material, both is magnitude and in lifetime, offering insight in the design principles to optimize these materials for radiation detection applications.
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