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- W4328130032 abstract "Abstract By using the solid-state reaction approach, composite polycrystalline samples of (Bi 0.98 In 0.02 ) 2 Te 2.7 Se 0.3 / x %Bi 2 Se 3 were created with varying amounts of Bi 2 Se 3 , ( x = 5%, 10%, 15%, and 20%). The hexagonal crystal structure of the composite was revealed by x-ray diffraction (XRD) with a space group of R $$overline{3 }$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mover> <mml:mn>3</mml:mn> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> m . The surface of the samples was seen to have secondary particles using a field emission scanning electronic microscope. Every sample displayed the typical semi-conducting behaviour across the entire temperature range. In the complex (Bi 0.98 In 0.02 ) 2 Te 2.7 Se 0.3 , it was found that bismuth was coordinated with six selenium atoms and there were significant selenium vacancies. With an increase in bismuth selenide concentration, the dissolution pattern shifted to a substitutional pattern. A two fold decrease in electrical resistivity for (Bi 0.98 In 0.02 ) 2 Te 2.7 Se 0.3 /20%Bi 2 Se 3 composition was seen compared to (Bi 0.98 In 0.02 ) 2 Te 2.7 Se 0.3 /5%Bi 2 Se 3 . The granular material was produced by sintering and scattering of potential barrier, a thermal process that increases the Seebeck coefficient. A 200% increase was observed in thermopower for (Bi 0.98 In 0.02 ) 2 Te 2.7 Se 0.3 /20%Bi 2 Se 3 compared to (Bi 0.98 In 0.02 ) 2 Te 2.7 Se 0.3 /5%Bi 2 Se 3 compound. Graphical Abstract" @default.
- W4328130032 created "2023-03-22" @default.
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- W4328130032 date "2023-03-21" @default.
- W4328130032 modified "2023-10-04" @default.
- W4328130032 title "Thermoelectric Composite of (Bi0.98In0.02)2Te2.7Se0.3/Bi2Se3 with Enhanced Thermopower and Reduced Electrical Resistivity" @default.
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- W4328130032 doi "https://doi.org/10.1007/s11664-023-10346-5" @default.
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