• effect of se substitution on structural and electrical transport properties of bi0.4sb1.6se3x te3(1−x) hexagonal rods

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    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 1492
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     in the current study, novel hexagonal rods based on bi0.4sb1.6te3 ingots dispersed with x amount of se (x = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0) in the form bi0.4sb1.6se3x te3(1−x) were synthesized via a standard solid-state microwave route. the morphologies of these rods were explored using field-emission scanning electron microscopy (fesem). the crystal structure of the powders was examined by x-ray diffraction (xrd) analysis, which showed that powders of the 0.0 ≤ x ≤ 0.8 samples could be indexed to the rhombohedral phase, whereas the sample with x = 1.0 had an orthorhombic phase structure. the influence of variations in the se content on the thermoelectric properties was studied in the temperature range from 300 k to 523 k. alloying of se into bi0.4sb1.6te3 effectively caused a decrease in the hole concentration and, thus, a decrease in the electrical conductivity and an increase in the seebeck coefficient. the maximal power factor measured in the present work was 7.47 mw/mk2 at 373 k for the x = 0.8 sample.

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