Thermoelectric Properties of n-Type Bi2Te3/PbSe0.5Te0.5 Segmented Thermoelectric Material
- Thermoelectric Properties of n-Type Bi2Te3/PbSe0.5Te0.5 Segmented Thermoelectric Material
- 윤세진; 조준영; 구현; 배성환; 안승현; 김귀랑; 김진상; 박찬
- Thermoelectric material; segmented thermoelectric material; Bi2Te3; Pb(Se,Te)
- Issue Date
- Journal of electronic materials
- VOL 43, NO 2, 414-418
- 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.
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