Realizing thermoelectric cooling and power generation in N-type PbS<sub>0.6</sub>Se<sub>0.4</sub> via lattice plainification and interstitial doping.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 38710678.
- Also identified by DOI 10.1038/s41467-024-48268-3 and PMC identifier 11074254.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Thermoelectrics have great potential for use in waste heat recovery to improve energy utilization. Moreover, serving as a solid-state heat pump, they have found practical application in cooling electronic products. Nevertheless, the scarcity of commercial Bi<sub>2</sub>Te<sub>3</sub> raw materials has impeded the sustainable and widespread application of thermoelectric technology. In this study, we developed a low-cost and earth-abundant PbS compound with impressive thermoelectric performance. The optimized n-type PbS material achieved a record-high room temperature ZT of 0.64 in this system. Additionally, the first thermoelectric cooling device based on n-type PbS was fabricated, which exhibits a remarkable cooling temperature difference of ~36.9 K at room temperature. Meanwhile, the power generation efficiency of a single-leg device employing our n-type PbS material reaches ~8%, showing significant potential in harvesting waste heat into valuable electrical power. This study demonstrates the feasibility of sustainable n-type PbS as a viable alternative to commercial Bi<sub>2</sub>Te<sub>3</sub>, thereby extending the application of thermoelectrics.