Thermoelectric Properties of n-Type Bi2Te3/PbSe0.5Te0.5 Segmented Thermoelectric Material

Title
Thermoelectric Properties of n-Type Bi2Te3/PbSe0.5Te0.5 Segmented Thermoelectric Material
Authors
윤세진조준영구현배성환안승현김귀랑김진상박찬
Keywords
Thermoelectric material; segmented thermoelectric material; Bi2Te3; Pb(Se,Te)
Issue Date
2014-02
Publisher
Journal of electronic materials
Citation
VOL 43, NO 2, 414-418
Abstract
To investigate the effects of segmentation of thermoelectric materials on performance levels, n-type segmented Bi2Te3/PbSe0.5Te0.5 thermoelectric material was fabricated, and its output power was measured and compared with those of Bi2Te3 and PbSe0.5Te0.5. The two materials were bonded by diffusion bonding with a diffusion layer that was ~18 ㎛ thick. The electrical conductivity, Seebeck coefficient, and power factor of the segmented Bi2Te3/ PbSe0.5Te0.5 sample were close to the average of the values for Bi2Te3 and PbSe0.5Te0.5. The output power of Bi2Te3 was higher than those of PbSe0.5Te0.5 and the segmented sample for small DT (300 K to 400 K and 300 K to 500 K), but that of the segmented sample was higher than those of Bi2Te3 and PbSe0.5Te0.5 when DT exceeded 300 K (300 K to 600 K and 300 K to 700 K). The output power of the segmented sample was about 15% and 73% higher than those of the Bi2Te3 and PbSe0.5Te0.5 samples, respectively, when DT was 400 K (300 K to 700 K). The efficiency of thermoelectric materials for large temperature differences can be enhanced by segmenting materials with high performance in different temperature ranges.
URI
http://pubs.kist.re.kr/handle/201004/47150
ISSN
03615235
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KIST Publication > Article
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