Hwang, CW Hyun, DB Ha, HP Oh, TS 2024-01-21T12:10:09Z 2024-01-21T12:10:09Z 2021-09-04 2001-07 0022-2461 https://pubs.kist.re.kr/handle/201004/140382 Effects of excess Te on the thermoelectric properties of p-type 25% Bi2Te3-75% Sb2Te3 single crystal and hot-pressed sinter were characterized and understood with the micro-phase diagram near the stoichiometric composition obtained by measuring the equilibrium Seebeck coefficient. Thermoelectric properties of the 25% Bi2Te3-75% Sb2Te3 single crystal were varied with the amount of excess Te, as delta -phase of the single crystal becomes less Te-deficient with adding more excess Te. However, thermoelectric properties of the hot-pressed sinter were not varied with the amount of excess Te, because the composition of delta -phase is not changed with the amount of excess Te. While a maximum figure-of-merit of 2.39 x 10(-3)/K at 300 K was obtained for the 25% Bi2Te3-75% Sb2Te3 single crystal by adding 6 wt % excess Te, the hot-pressed 25% Bi2Te3-75% Sb2Te3 sinter exhibited the figure-of-merit of 2.97 x 10(-3)/K regardless of the excess Te amount. (C) 2001 Kluwer Academic Publishers. English SPRINGER DEFECTS ALLOYS Effects of excess Te on the thermoelectric properties of p-type 25% Bi2Te3-75% Sb2Te3 single crystal and hot-pressed sinter Article 10.1023/A:1017959008268 1 JOURNAL OF MATERIALS SCIENCE, v.36, no.13, pp.3291 - 3297 JOURNAL OF MATERIALS SCIENCE 36 13 3291 3297 scie scopus 000169325100028 2-s2.0-0035393295 Materials Science, Multidisciplinary Materials Science Article DEFECTS ALLOYS bismuth telluride single crystal hot-pressing thermoelectric property