Structural and thermoelectric properties of Bi2Sr2Co2Oy thin films on LaAlO3 (100) and fused silica substrates

Wang, Shufang; Venimadhav, A.; Guo, Shengming; Chen, Ke; Li, Qi; Soukiassian, A.; Schlom, Darrell G.; Katz, Michael B.; Pan, X. Q.; Wong-Ng, Winnie; Vaudin, Mark D.; Xi, X. X.
January 2009
Applied Physics Letters;1/12/2009, Vol. 94 Issue 2, pN.PAG
Academic Journal
We have grown Bi2Sr2Co2Oy 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 Bi2Sr2Co2Oy film on Nb-doped SrTiO3 single crystal, which showed a rectifying behavior. These thin films and heterostructures may be used for future thermoelectric applications.


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