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Vol.45, No.1, 55 ~ 61, 2007
Title
Effect of Addition of Ge on the Thermoelectric Properties of ReSi(1.75) Single Crystals
이희웅 Hee Woong Lee , 김봉서 Bong Seo Kim , 위당문 Dang Moon Wee , 오명훈 Myung Hoon Oh , 박수동 Su Dong Park , 오민욱 Min Wook Oh
Abstract
The effect of Ge addition on the thermoelectric properties of ReSi1.75 single crystals has been investigated in the temperature range between 323 and 1073 K. The value of the electrical resistivity along [100] of the ternary alloys is lower than that of the binary in the whole temperature range, while the value along [001] of the ternary approaches to the value of the binary as the temperature increases. The band-gap along [001] for the ternary alloys is smaller than that of the binary. The ternary alloys show the large values of the Seebeck coefficient along [001] at 323 K The maximum dimensionless figures of merit of 0.45 at 923 K and 0.8 at 1073 K are obtained for ReSi1.73Ge0.02 samples along [100] and [001], respectively.
Key Words
ReSi(1.75), thermoelectric properties, seebeck coefficient, electrical properties
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