{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Zhu H"],"funding":["Fundamental Research Funds for the Central Universities","National Natural Science Foundation of China","China Postdoctoral Science Foundation","National Key Research and Development Program","National Postdoctoral Program for Innovative Talents","Youth Innovation Promotion Association CAS","Anhui Provincial Natural Science Foundation","Key Research Program of Frontier Sciences"],"pagination":["nwaa085"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC8288408"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["8(2)"],"pubmed_abstract":["Many layered superlattice materials intrinsically possess large Seebeck coefficient and low lattice thermal conductivity, but poor electrical conductivity because of the interlayer transport barrier for charges, which has become a stumbling block for achieving high thermoelectric performance. Herein, taking BiCuSeO superlattice as an example, it is demonstrated that efficient interlayer charge release can increase carrier concentration, thereby activating multiple Fermi pockets through Bi/Cu dual vacancies and Pb codoping. Experimental results reveal that the extrinsic charges, which are introduced by Pb and initially trapped in the charge-reservoir [Bi<sub>2</sub>O<sub>2</sub>]<sup>2+</sup> sublayers, are effectively released into [Cu<sub>2</sub>Se<sub>2</sub>]<sup>2-</sup> sublayers via the channels bridged by Bi/Cu dual vacancies. This efficient interlayer charge release endows dual-vacancy- and Pb-codoped BiCuSeO with increased carrier concentration and electrical conductivity. Moreover, with increasing carrier concentration, the Fermi level is pushed down, activating multiple converged valence bands, which helps to maintain a relatively high Seebeck coefficient and yield an enhanced power factor. As a result, a high <i>ZT</i> value of ∼1.4 is achieved at 823 K in codoped Bi<sub>0.90</sub>Pb<sub>0.06</sub>Cu<sub>0.96</sub>SeO, which is superior to that of pristine BiCuSeO and solely doped samples. The present findings provide prospective insights into the exploration of high-performance thermoelectric materials and the underlying transport physics."],"journal":["National science review"],"pubmed_title":["Efficient interlayer charge release for high-performance layered thermoelectrics."],"pmcid":["PMC8288408"],"funding_grant_id":["2017YFA0303500","QYZDY-SSW-SLH011","2017M620261","2016392","2018YFB0703602","21622107","U1832142","21805269"],"pubmed_authors":["Li X","Yang J","Li Z","Zhao C","Xie Y","Zhu H","Xiao C"],"additional_accession":[]},"is_claimable":false,"name":"Efficient interlayer charge release for high-performance layered thermoelectrics.","description":"Many layered superlattice materials intrinsically possess large Seebeck coefficient and low lattice thermal conductivity, but poor electrical conductivity because of the interlayer transport barrier for charges, which has become a stumbling block for achieving high thermoelectric performance. Herein, taking BiCuSeO superlattice as an example, it is demonstrated that efficient interlayer charge release can increase carrier concentration, thereby activating multiple Fermi pockets through Bi/Cu dual vacancies and Pb codoping. Experimental results reveal that the extrinsic charges, which are introduced by Pb and initially trapped in the charge-reservoir [Bi<sub>2</sub>O<sub>2</sub>]<sup>2+</sup> sublayers, are effectively released into [Cu<sub>2</sub>Se<sub>2</sub>]<sup>2-</sup> sublayers via the channels bridged by Bi/Cu dual vacancies. This efficient interlayer charge release endows dual-vacancy- and Pb-codoped BiCuSeO with increased carrier concentration and electrical conductivity. Moreover, with increasing carrier concentration, the Fermi level is pushed down, activating multiple converged valence bands, which helps to maintain a relatively high Seebeck coefficient and yield an enhanced power factor. As a result, a high <i>ZT</i> value of ∼1.4 is achieved at 823 K in codoped Bi<sub>0.90</sub>Pb<sub>0.06</sub>Cu<sub>0.96</sub>SeO, which is superior to that of pristine BiCuSeO and solely doped samples. The present findings provide prospective insights into the exploration of high-performance thermoelectric materials and the underlying transport physics.","dates":{"release":"2021-01-01T00:00:00Z","publication":"2021 Feb","modification":"2025-06-01T03:27:24.834Z","creation":"2025-06-01T03:27:24.834Z"},"accession":"S-EPMC8288408","cross_references":{"pubmed":["34691564"],"doi":["10.1093/nsr/nwaa085"]}}