Work

Evaluation of Thermoelectric Properties of Highly Dense Bi2Te3 Nanowire Arrays by Macro-Integration Method

Year: 2007

Type: article

Abstract: High dense Bi2Te3 nanowire arrays were fabricated in porous anodic alumina (PAA) by electrochemical deposition. A macro-integration measurement was used to study the thermoelectric properties of a superimposed layer of Bi2Te3/PAA structure. In this macro-integration system, meaningful amounts of heat will transport along Bi2Te3 nanowire arrays, and so the measurement errors of micro-current and micro-temperature difference of individual nanowire can be eliminated. The influences of wire diameter, area fraction of wires and interface thermal resistance in the sandwich structure on the measurement accuracy of Seebeck coefficient and electrical conductivity of Bi2Te3/Al2O3 system were discussed. The experimental electrical conductivity is close to the theoretically calculated value. Further improvement in eliminating the interface thermal resistance would bring more reliable result in Seebeck coefficient measurement. The macro-integration measurement is a practical method to evaluate the thermoelectric properties of thermoelectric nanowire arrays.

Source: Key engineering materials

DOI: 10.4028/www.scientific.net/kem.352.239

Authors: Chun Fen Wang, Qun Wang, Sheng Cong Liufu, Qin Yao, Li Dong Chen

Institution: Chinese Academy of Sciences

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Funders: National Natural Science Foundation of China, National Key Research and Development Program of China