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Detailed Program
| Paper Number : TE-I06 |
| Time Frame : 15:00~15:25 |
| Presentation Date : Thurseday, 27, November |
| Session Name : Thermoelectrics |
| Session Chair 1# : Soonil Lee |
| Session Chair 2# : Yunichi Nakamura |
|
| Thermoelectric Properties of Doped n-type Cu0.008Bi2Te2.7Se0.3 |
| Kyu Hyoung Lee |
| Kangwon National University |
|
Herein we report that the doping of several transition metal elements is effective in enhancing the Seebeck coefficient of n-type Cu0.008Bi2Te2.7Se0.3. The absolute value of room temperature Seebeck coefficient increases significantly, benefiting from an enhancement of the density of states (DOS) effective mass, due to a DOS engineering effect by resonant state formation and/or chemical potential tuning, which gives rise to higher DOS at the bottom of the conduction band. Enhancement in Seebeck result in the highest thermoelectric figure of merit ZT = 0.85 at 300 K. This compositional tuning approach highlights the possibility of further enhancement of ZT of n-type Bi-Te-based compounds by combination of nanostructuring technologies.
References:
[1] W. Liu, Q. Zhang, Y. Lan, S. Chen, X. Yan, Q. Zhang, H. Wang, D. Wang, G. Chen and Z. Ren, Adv. Energy Mater. 1 (2011) 577.
[2] G. Snyder and E. Toberer, Nat. Mater. 7 (2008) 105. |
| Acknowledgements : |
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