Optical determination of the charge carrier mobility in Sn2P2S6
- 31 October 2016
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 109 (18) , 182104
Abstract
We determine both the lifetime and the mobility of photoexcited charge carriers in Sn2P2S6 using holographic time of flight in diffusion mode. From the build-up dynamics of space charge gratings created by pulsed interband illumination at 532 nm, we find a charge carrier lifetime of 2.6 ± 0.5 ns and a charge carrier mobility along the x-axis of 2.4 ± 0.6 cm2 V−1 s−1 at room temperature. This mobility is assigned to holes as more mobile carriers in tin hypothiodiphosphate (SPS), and it is found to decrease for decreasing temperature, a behavior consistent with small-polaron hopping.Keywords
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