Influence of nanoscale Ag2Te precipitates on the thermoelectric properties of the Sn doped P-type AgSbTe2 compound
oleh: Rajeshkumar Mohanraman, Raman Sankar, Fang-Cheng Chou, Chih-Hao Lee, Yoshiyuki Iizuka, I. Panneer Muthuselvam, Yang-Yuan Chen
| Format: | Article |
|---|---|
| Diterbitkan: | AIP Publishing LLC 2014-09-01 |
Deskripsi
We report a maximal figure of merit (ZT) value of 1.1 at 600 K was obtained for the sample of which x = 0.03, representing an enhancement greater than 20% compared with a pristine AgSbTe2 sample. This favorable thermoelectric performance originated from the optimal Sn2+ substitution for Sb3+ in AgSbTe2, which not only increased electrical conductivity but also led to a substantial reduction in thermal conductivity that was likely caused by an enhanced phonon-scattering mechanism through the combined effects of lattice defects and the presence of Ag2Te nanoprecipitates dispersed in the matrix.