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Thermoelectric Properties of Cu-Doped Bi₂Te2.7Se0.3 Fabricated by Hot Pressing
Yeon-Jin Baek1, Ji-Hyun Beck1, Si-Young Son1
1Department of Material Science and Engineering, INHA University, Incheon 22212, Korea.
Abstract:
Owing to the energy and environmental issues, energy recovery technologies attract an increasing interest. Thermoelectric power generation is a recycling technology, which directly converts heat energy into electric energy by reusing waste heat. In this study, n-type Bi₂Te2.7Se0.3 thermoelectric materials doped with Cu were fabricated by hot pressing. The Bi-Te system has excellent thermoelectric properties in the middle- and low-temperature ranges; when a certain amount of Cu dopant is added, the thermoelectric properties are improved. The thermoelectric properties of the samples doped with Cu were compared with those of the intrinsic Bi-Te-based sample without Cu doping. In addition, the effects of the Cu concentration on the thermoelectric-material structures were investigated.
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