Thin-Film Thermoelectric Module for Power Generator Applications Using a Screen-Printing Method |
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Authors: | Heon-Bok Lee Hyun Jeong Yang Ju Hyung We Kukjoo Kim Kyung Cheol Choi Byung Jin Cho |
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Affiliation: | (1) Center for Dielectric Studies, Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA;(2) Murata Manufacturing Co. Ltd, 10-1 Higashikotari 1-chome, Nagaokakyo Kyoto, 617-8555, Japan; |
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Abstract: | A new process for fabricating a low-cost thermoelectric module using a screen-printing method has been developed. Thermoelectric properties of screen-printed ZnSb films were investigated in an effort to develop a thermoelectric module with low cost per watt. The screen-printed Zn x Sb1−x films showed a low carrier concentration and high Seebeck coefficient when x was in the range of 0.5 to 0.57 and the annealing temperature was kept below 550°C. When the annealing temperature was higher than 550°C, the carrier concentration of the Zn x Sb1−x films reached that of a metal, leading to a decrease of the Seebeck coefficient. In the present experiment, the optimized carrier concentration of screen-printed ZnSb was 7 × 1018/cm3. The output voltage and power density of the ZnSb film were 10 mV and 0.17 mW/cm2, respectively, at ΔT = 50 K. A thermoelectric module was produced using the proposed screen-printing approach with ZnSb and CoSb3 as p-type and n-type thermoelectric materials, respectively, and copper as the pad metal. |
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