气候变化领域集成服务门户(CCPortal): Hierarchical structures lead to high thermoelectric performance in Cu: M + nPb100SbmTe100Se2 m(CLAST)

CCPortal

DOI	10.1039/d0ee03459b
	Hierarchical structures lead to high thermoelectric performance in Cu: M + nPb100SbmTe100Se2 m(CLAST)
	Wang S.; Xiao Y.; Chen Y.; Peng S.; Wang D.; Hong T.; Yang Z.; Sun Y.; Gao X.; Zhao L.-D.
发表日期	2021
ISSN	17545692
起始页码	451
结束页码	461
卷号	14 期号:1
英文摘要	Ternary compound CuSbSe2-alloyed PbTe, CumPb100SbmTe100Se2m (CLAST), presents outstanding n-type thermoelectric transport behavior and features hierarchical Cu-based precipitates and interstitials that can balance phonon and carrier transport. Results show that a small amount of CuSbSe2 (~3%) alloying in CLAST can realize a room-temperature carrier concentration of ~1.7 × 1018 cm-3 and then optimize the power factor, and simultaneously precipitate out embedded Cu-based nanostructures in the matrix to lower the lattice thermal conductivity. Additionally, extra Cu atoms adding in CLAST can form interstitials and further improve both the carrier concentration to ~3.0 × 1018 cm-3 and carrier mobility to ~1227.8 cm2 V-1 s-1 at room temperature, which benefits a maximum power factor of ~20.0 µW cm-1 K-2 in Cu3.3Pb100Sb3Te100Se6. Moreover, the Cu interstitials together with massive Cu-based nanoprecipitates can strongly scatter a wide set of phonons, and largely lower the lattice thermal conductivity to ~0.44 W m-1 K-1 in Cu3.4Pb100Sb3Te100Se6 at 623 K. Finally, these Cu-based hierarchical structures in CLAST samples can synergistically optimize the phonon and carrier transport properties and contribute to a high ZT of ~0.5 at 300 K and a peak ZT of ~1.4 at 723 K. A remarkably high ZTave of ~0.94 at 300-723 K is achieved in Cu3.3Pb100Sb3Te100Se6 due to high ZT values in the low temperature range, outperforming other high-performance n-type PbTe-based thermoelectric materials. © The Royal Society of Chemistry.
英文关键词	Carrier concentration; Carrier transport; Copper; Crystal lattices; Electric power factor; Hall mobility; Hole mobility; IV-VI semiconductors; Phonons; Precipitation (chemical); Temperature; Thermal conductivity; Thermoelectricity; Hierarchical structures; Lattice thermal conductivity; Low temperatures; Maximum power factor; Ternary compounds; Thermo-Electric materials; Thermoelectric performance; Thermoelectric transport; Copper alloys; concentration (composition); lattice dynamics; nanoparticle; optimization; perovskite; separation
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190801
作者单位	School of Materials Science and Engineering, Liaoning Technical University, Fuxin, 123000, China; School of Materials Science and Engineering, Beihang University, Beijing, 100191, China; Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing, 100094, China; College of Construction Machinery, Shandong Jiaotong University, Ji'nan, 250357, China
推荐引用方式 GB/T 7714	Wang S.,Xiao Y.,Chen Y.,et al. Hierarchical structures lead to high thermoelectric performance in Cu: M + nPb100SbmTe100Se2 m(CLAST)[J],2021,14(1).
APA	Wang S..,Xiao Y..,Chen Y..,Peng S..,Wang D..,...&Zhao L.-D..(2021).Hierarchical structures lead to high thermoelectric performance in Cu: M + nPb100SbmTe100Se2 m(CLAST).Energy & Environmental Science,14(1).
MLA	Wang S.,et al."Hierarchical structures lead to high thermoelectric performance in Cu: M + nPb100SbmTe100Se2 m(CLAST)".Energy & Environmental Science 14.1(2021).