Semimetal/semiconductor nanocomposites for thermoelectrics
| Autor: | Peter Burke, Ashok T. Ramu, Hong Lu, Je-Hyeong Bahk, Gehong Zeng, John E. Bowers, Arthur C. Gossard |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Dopant business.industry Mechanical Engineering Temperature Nanotechnology Thermoelectric materials Semimetal Nanocomposites Thermoelectric generator Semiconductor Semiconductors Mechanics of Materials Seebeck coefficient Thermoelectric effect General Materials Science Metals Rare Earth business Molecular beam epitaxy |
| Zdroj: | Advanced materials (Deerfield Beach, Fla.). 23(20) |
| ISSN: | 1521-4095 |
| Popis: | In this work, we present research on semimetal-semiconductor nanocomposites grown by molecular beam epitaxy (MBE) for thermoelectric applications. We study several different III-V semiconductors embedded with semimetallic rare earth-group V (RE-V) compounds, but focus is given here to ErSb:In(x)Ga(1−x)Sb as a promising p-type thermoelectric material. Nanostructures of RE-V compounds are formed and embedded within the III-V semiconductor matrix. By co-doping the nanocomposites with the appropriate dopants, both n-type and p-type materials have been made for thermoelectric applications. The thermoelectric properties have been engineered for enhanced thermoelectric device performance. Segmented thermoelectric power generator modules using 50 μ m thick Er-containing nanocomposites have been fabricated and measured. Research on different rare earth elements for thermoelectrics is discussed. |
| Databáze: | OpenAIRE |
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