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Enhanced high temperature thermoelectric properties of Bi-doped c-axis oriented Ca3Co4O9 thin films by pulsed laser deposition.

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Enhanced high temperature thermoelectric properties of Bi-doped c-axis oriented Ca3Co4O9 thin films by pulsed laser deposition.
นักวิจัย : Sun, T. , Hng, H. H. , Yan, Q. Y. , Ma, J.
คำค้น : DRNTU::Engineering::Materials::Microelectronics and semiconductor materials::Thin films.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2553
อ้างอิง : Sun, T., Hng, H. H., Yan, Q. Y., & Ma, J. (2010). Enhanced high temperature thermoelectric properties of Bi-doped c-axis oriented Ca3Co4O9 thin films by pulsed laser deposition. Journal of applied physics, 108(8), 083709-. , 0021-8979 , http://hdl.handle.net/10220/18821 , http://dx.doi.org/10.1063/1.3499324
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Journal of applied physics
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Ca3−xBixCo4O9 (x=0–0.4) thin films were deposited on single-crystal sapphire (0001) substrates by pulsed laser deposition. Structural characterizations indicated that these thin films exhibited perfect c-axis orientation and were well crystallized. Surface chemical states analysis confirmed Bi-substitution for Ca in the thin films with x<0.4. For the thin film with x=0.4, excessive Bi were found isolated within the film. Due to their perfect orientation, in-plane electrical properties of these thin films measured from 300 to 740 K were found to be comparable to those of the single crystals. Furthermore, Bi-substitution was noted for the reduced electrical resistivity and enhanced Seebeck coefficient. The above superior properties resulted in a high power factor of 0.81 mW m−1 K−2 at 740 K for thin film Ca2.7Bi0.3Co4O9, which was about 29% improvement as compared to that of pure Ca3Co4O9 thin film. The results suggested that Bi-doped Ca3Co4O9 thin films could be a promising candidate for thermoelectric applications at elevated temperatures.

บรรณานุกรม :
Sun, T. , Hng, H. H. , Yan, Q. Y. , Ma, J. . (2553). Enhanced high temperature thermoelectric properties of Bi-doped c-axis oriented Ca3Co4O9 thin films by pulsed laser deposition..
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Sun, T. , Hng, H. H. , Yan, Q. Y. , Ma, J. . 2553. "Enhanced high temperature thermoelectric properties of Bi-doped c-axis oriented Ca3Co4O9 thin films by pulsed laser deposition.".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Sun, T. , Hng, H. H. , Yan, Q. Y. , Ma, J. . "Enhanced high temperature thermoelectric properties of Bi-doped c-axis oriented Ca3Co4O9 thin films by pulsed laser deposition.."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2553. Print.
Sun, T. , Hng, H. H. , Yan, Q. Y. , Ma, J. . Enhanced high temperature thermoelectric properties of Bi-doped c-axis oriented Ca3Co4O9 thin films by pulsed laser deposition.. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2553.