Preparation and thermoelectric properties of Bi2SexTe3?x bulk materials |
| |
| Affiliation: | 1. Key Laboratory of Advanced Civil Engineering materials of Education, Tongji University, 4800 Caoan Road, Shanghai 201804, China;2. School of Materials Science & Engineering, Tongji University, Shanghai 201804, China;3. School of Materials Science and Engineering, Fujian University of Technology, Fuzhou 350108, China;4. CSIRO Manufacturing, Gate 5, Normanby Road, Clayton VIC 3168, Australia;1. Institute of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany;2. Chemistry Department, University of Oregon, Eugene, OR 97403, United States;3. Department of Solid State Physics, University of Debrecen, H-4010 Debrecen, P.O. Box 2, Hungary;1. Instituto de Microelectrónica de Barcelona, Centro Nacional de Microelectrónica (IMB-CNM, CSIC), Campus UAB, Bellaterra, 08193, Barcelona, Spain;2. Department of Advanced Materials for Energy Applications, Catalonia Institute for Energy Research (IREC), C/Jardí de les Dones de Negre 1, 08930, Barcelona, Spain |
| |
| Abstract: | Bi2Te3 and Bi2Se3 nanoplates were synthesized by a microwave-assisted wet chemical method, and Bi2SexTe3?x (x=1, 2, 3) bulk nanocomposites were then prepared by hot pressing the Bi2Te3 and Bi2Se3 nanoplates at 80 MPa and 723 K in vacuum. The phase composition and microstructures of the bulk samples were characterized by powder X-ray diffraction and field-emission scanning electron microscopy, respectively. The electrical conductivity of the Bi2SexTe3?x bulk nanocomposites increases with increasing Se content, and the Seebeck coefficient value is negative, showing n-type conduction. The absolute Seebeck coefficient value decreases with increasing Se content. A highest power factor, 24.5 µWcm?1 K?2, is achieved from the sample of x=1 at 369 K among the studied samples. |
| |
| Keywords: | Thermoelectric Microwave-assisted wet chemical method |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
