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Meeting Materials Science & Technology 2020
Symposium 2020 Undergraduate Student Poster Contest
Presentation Title Comparative Study of Transport propeties of Bismuth Sulfide with Different Dopants
Author(s) Farheen Anjum
On-Site Speaker (Planned) Farheen Anjum
Abstract Scope A large band gap and hence low electrical conductivity in comparison to other bismuth chalcogenides limits thermoelectric performance bismuth sulfide. Various strategies such as doping have been used for improving its TE performance. Here we report the synthesis and thermoelectric properties of SPSed Bi2S3 and enhanced its performance by using x-mole% of CuCl2 , x-mole% CaCl2 ,SnS2 as dopant. Powder in stoichiometric compositions were mixed and synthesised by melt and grow process and sintered by SPS. XRD of all samples shows single phase formation. The increasing halide dopant concentration leads to the improvement in its electrical property and after an optimised value it decreases. As a result a higher power factor ~2000 μW/m-K2 for CuCl2 as dopant and ~1600 μW/m-K2 for CaCl2 is obtained. However sulphide dopant deceases conductivity as well as PF very low. ZT values greater than 1 was achieved in these halide doped chalcogenides.


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