Back to Search
Start Over
Lattice plainification advances highly effective SnSe crystalline thermoelectrics.
- Source :
-
Science . 5/26/2023, Vol. 381 Issue 6647, p841-846. 6p. 4 Graphs. - Publication Year :
- 2023
-
Abstract
- Thermoelectric technology has been widely used for key areas, including waste-heat recovery and solid-state cooling. We discovered tin selenide (SnSe) crystals with potential power generation and Peltier cooling performance. The extensive off-stoichiometric defects have a larger impact on the transport properties of SnSe, which motivated us to develop a lattice plainification strategy for defects engineering. We demonstrated that Cu can fill Sn vacancies to weaken defects scattering and boost carrier mobility, facilitating a power factor exceeding ~100 microwatts per centimeter per square kelvin and a dimensionless figure of merit (ZT) of ~1.5 at 300 kelvin, with an average ZT of ~2.2 at 300 to 773 kelvin. We further realized a single-leg efficiency of ~12.2% under a temperature difference (DT) of ~300 kelvin and a seven-pair Peltier cooling DTmax of ~61.2 kelvin at ambient temperature. Our observations are important for practical applications of SnSe crystals in power generation as well as electronic cooling. [ABSTRACT FROM AUTHOR]
- Subjects :
- *THERMOELECTRIC cooling
*TIN selenide
*COPPER
*CHARGE carrier mobility
*COOLING
Subjects
Details
- Language :
- English
- ISSN :
- 00368075
- Volume :
- 381
- Issue :
- 6647
- Database :
- Academic Search Index
- Journal :
- Science
- Publication Type :
- Academic Journal
- Accession number :
- 163960060
- Full Text :
- https://doi.org/10.1126/science.adg7196