A Study on N-Type Bismuth Sulphochloride (BiSCl): Efficient Synthesis and Characterization
Irregular rod-like bismuth sulphochloride (BiSCl) was synthesized by a high efficiency process in which BiCl 3 and Bi 2 S 3 were fully ground and mixed in N 2 atmosphere followed by a sintering at 227 ∘ C for 9 h to achieve crimson BiSCl powder. The products were characterized by X-ray powder diffraction (XRD) and scanning electronic microscopy coupled with energy dispersive X-ray spectroscopy (SEM-EDX). The BiSCl is an n-type semiconductor with a bandgap of 1.9 eV. In the temperature range of 300–500 K, thermal conductivity, electrical conductivity, Seebeck coefficient and thermoelectric figure of merit ZT of the BiSCl were tested and calculated. It is resulted that the BiSCl has a thermal conductivity of 0.45 Wm −1 K −1 at 500 K and a Seebeck coefficient of −579 μVK −1 at 400 K. This work will help inform future in-depth studies on possible applications of BiSCl in the fields of thermoelectricity, optoelectronics and photocatalyticity.
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