| Autor: |
Moshwan R, Shi XL, Liu WD, Yang L, Wang Y; Centre for Future Materials , The University of Southern Queensland , Springfield , Queensland 4300 , Australia., Hong M; Centre for Future Materials , The University of Southern Queensland , Springfield , Queensland 4300 , Australia., Auchterlonie G, Zou J, Chen ZG; Centre for Future Materials , The University of Southern Queensland , Springfield , Queensland 4300 , Australia. |
| Jazyk: |
angličtina |
| Zdroj: |
ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2018 Nov 14; Vol. 10 (45), pp. 38944-38952. Date of Electronic Publication: 2018 Oct 30. |
| DOI: |
10.1021/acsami.8b14233 |
| Abstrakt: |
In this study, we fabricate In/Cd codoped octahedron-shape Sn(CdIn) x Te 1+2 x microcrystals with a promising thermoelectric performance by using a facile solvothermal method. The high hole-carrier concentration of pristine SnTe is significantly reduced through effective In/Cd codoping, which increases the Seebeck coefficient in a wide temperature range. Moreover, codoped In/Cd not only modifies the band structure by creating the resonance energy level at the valence band and converging light hole and heavy hole valence bands of SnTe but also provides In/Cd-rich nanoprecipitates in the matrix, leading to a high power factor of ∼26.76 μW cm -1 K -2 at 773 K in the sintered SnIn 0.03 Cd 0.03 Te 1.06 . Compared with the bulk counterparts, a much lower lattice thermal conductivity is achieved over a wide temperature range because of strong phonon scattering by point defects, nanoprecipitates, lattice distortion, and grain boundaries in the sintered SnIn x Cd x Te 1+2 x ( x = 3 and 4%) samples. Consequently, a high ZT of ∼1.12 is obtained at 773 K in the p-type SnIn 0.03 Cd 0.03 Te 1.06 , suggesting that nanoprecipitate-included Cd/In codoped octahedron-shaped Sn(CdIn) x Te 1+2 x microcrystals are a convincing candidate for medium-temperature thermoelectric applications. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
|
