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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Miyazaki, K. Takashiri, M. Kurosaki, J.-i. Lenoir, B. Dauscher, A. Tsukamoto, H. |
| Copyright Year | 2007 |
| Description | Author affiliation: Dept. of Biol. Functions & Eng., Kyushu Inst. of Technol., Fukuoka (Miyazaki, K.; Takashiri, M.; Kurosaki, J.-i.) |
| Abstract | In this study, we fabricated in-plane thermoelectric micro-generators (4 mm times 4 mm) based on bismuth telluride thin films by using flash evaporation method. The thermoelectric properties of as-grown thin films are lower than those of bulk materials. Therefore the as-grown thin films were annealed in hydrogen at atmospheric pressure for 1 hour in a temperature range of 200 degC. to 400degC. By optimizing the annealing temperature, thin films with high thermoelectric power factors of 8.8 $muW/(cmldrK^{2})$ in n-type and 13.8 muW/(cmldr $K^{2})$ in p-type are obtained. To evaluate the figure of merit of the thin film, the thermal conductivity of the n-type thin film is measured by the 3omega method. The thin film annealed at 200degC exhibited a cross-plane thermal conductivity of 1.2 W/(mldrK). Micro-generators of flash-evaporated bismuth-telluride thin films are fabricated using three shadow masks. The shadow masks are prepared by standard micro-fabrication processes such as nitridation of Si, dry etching, and wet etching. Thermoelectric power of the as-grown thin film devices with 16 pairs of p-n legs are measured by YAG laser heating at the center of the devices. The maximum open circuit voltage is 6.7 mV under 2.5 K temperature difference. |
| Starting Page | 294 |
| Ending Page | 299 |
| File Size | 845628 |
| Page Count | 6 |
| File Format | |
| ISBN | 9781424422623 |
| ISSN | 10942734 |
| DOI | 10.1109/ICT.2007.4569482 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2007-06-03 |
| Publisher Place | South Korea |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Bismuth Transistors Thermoelectricity Thermal conductivity Annealing Hydrogen Temperature distribution Reactive power Conductivity measurement Dry etching |
| Content Type | Text |
| Resource Type | Article |
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