We have grown Bi2 Sr2 Co2 Oy thin films on LaAlO3 (100) and fused silica substrates by pulsed laser deposition. The films on LaAlO3 are c -axis oriented and partially in-plane aligned with multiple domains, while the films on fused silica are preferred c -axis oriented without in-plane alignment. The Seebeck coefficient and resistivity of films on both substrates are comparable to those of single crystals. An oxide p-n heterojunction was formed by depositing Bi2 Sr2 Co2 Oy film on Nb-doped SrTiO3 single crystal, which showed a rectifying behavior. These thin films and heterostructures may be used for future thermoelectric applications.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)