Work

Impact of the amount of single-wall carbon nanotubes (SWCNTs) in single-crystalline Bi 2 Te 3 nanoplates/SWCNTs nanocomposite films by drop-casting method

Year: 2019

Type: article

Abstract: To investigate the effect of adding single-wall carbon nanotubes (SWCNTs) to Bi 2 Te 3 nanoplate thin films, we prepared Bi 2 Te 3 nanoplate/SWCNTs nanocomposite thin films with different amounts of SWCNTs using a drop-casting technique. The Bi 2 Te 3 nanoplates prepared by solvothermal synthesis exhibited a single-crystalline phase with rhombohedral crystal structure. The nanoplates had flat surfaces with edge size of approximately 1 μ m. The completed nanocomposite thin films were thermally annealed at 250 °C to improve their electrical conductivity. The electrical conductivity of the nanocomposite thin films with added SWCNTs improved, but the power factor decreased compared to those of the Bi 2 Te 3 nanoplate thin film. This occurred because the quality of Bi 2 Te 3 nanoplates in the nanocomposite thin films decreased due to excessive annealing as the introduced SWCNTs have high thermal conductivity. Therefore, we reduced the annealing temperature of nanocomposite thin films to 225 °C and found that the power factor was significantly improved.

Source: Japanese Journal of Applied Physics

DOI: 10.7567/1347-4065/ab12c1

Authors: Yuichi Hosokawa, Masayuki Takashiri

Institution: Tokai University

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: bronze

Funders: Ministry of Education, Culture, Sports, Science and Technology, Hokkaido University, Japan Society for the Promotion of Science