Facile Solution Synthesis, Processing and Characterization of n- and p-Type Binary and Ternary Bi-Sb Tellurides

QC 20200611
The solution synthesis route as a scalable bottom-up synthetic method possesses significant advantages for synthesizing nanostructured bulk thermoelectric (TE) materials with improved performance. Tuning the composition of the materials directly in the solution, without needing any further processing, is important for adjusting the dominant carrier type. Here, we report a very rapid (2 min) and high yield (>8 g/batch) synthetic method using microwave-assisted heating, for the controlled growth of Bi2-xSbxTe3 (x: 0-2) nanoplatelets. Resultant materials exhibit a high crystallinity and phase purity, as characterized by XRD, and platelet morphology, as revealed by SEM. Surface chemistry of as-made materials showed a mixture of metallic and oxide phases, as evidenced by XPS. Zeta-potential analysis exhibited a systematic change of isoelectric point as a function of the material composition. As-made materials were directly sintered into pellets by using spark plasma sintering process. TE performance of Bi2-xSbxTe3 pellets were studied, where the highest ZT values of 1.04 (at 440 K) for Bi2Te3 and 1.37 (at 523 K) for Sb2Te3 were obtained, as n- and p-type TE materials. The presented microwave-assisted synthesis method is energy effective, a truly scalable and reproducible method, paving the way for large scale production and implementation of towards large-area TE applications.

Ballikaya, SedatIstanbul Univ, Dept Phys, TR-34320 Istanbul, Turkey. (författare)
Batili, HazalKTH,Biomedicinsk fysik och röntgenfysik(Swepub:kth)u174hl0q (författare)
Roosmark, VikingKTH,Biomedicinsk fysik och röntgenfysik(Swepub:kth)u1ucelxh (författare)
Orlovska, MartinaSlovak Univ Technol Bratislava, Dept Inorgan Mat, Bratislava 81237, Slovakia. (författare)
Yusuf, AminuIstanbul Univ Cerrahpasa, Dept Elec & Elec Engn, TR-34135 Istanbul, Turkey. (författare)
Johnsson, MatsStockholms universitet,Institutionen för material- och miljökemi (MMK),Stockholm Univ, Dept Mat & Environm Chem, SE-10691 Stockholm, Sweden.(Swepub:su)matjo (författare)
Szukiewicz, RafalLUKASIEWICZ Res Network PORT Polish Ctr Technol D, Stablowicka 147, PL-54066 Wroclaw, Poland.;Univ Wroclaw, Inst Expt Phys, Maxa Borna 9, PL-50204 Wroclaw, Poland. (författare)
Kuchowicz, MaciejLUKASIEWICZ Res Network PORT Polish Ctr Technol D, Stablowicka 147, PL-54066 Wroclaw, Poland.;Univ Wroclaw, Inst Expt Phys, Maxa Borna 9, PL-50204 Wroclaw, Poland. (författare)
Toprak, Muhammet,1973-KTH,Biomedicinsk fysik och röntgenfysik(Swepub:kth)u1u3m5a2 (författare)
KTHBiomedicinsk fysik och röntgenfysik (creator_code:org_t)

Av författaren/redakt...: Hamawandi, Bejan ...; Ballikaya, Sedat; Batili, Hazal; Roosmark, Viking; Orlovska, Martin ...; Yusuf, Aminu; visa fler...; Johnsson, Mats; Szukiewicz, Rafa ...; Kuchowicz, Macie ...; Toprak, Muhammet ...; visa färre...

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