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Influence of Y3+ doping on the high-temperature transport mechanism and thermoelectric response of misfit-layered Ca3Co4O9
Wang, Yang1,3; Sui, Yu1,2; Cheng, Jinguang1; Wang, Xianjie1; Su, Wenhui1,2; Fan, Hongjin3
Corresponding AuthorSui, Yu(suiyu@hit.edu.cn)
2010-05-01
Source PublicationAPPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
ISSN0947-8396
Volume99Issue:2Pages:451-458
AbstractThe high-temperature transport and thermoelectric characteristics of Ca3-x Y (x) Co4O9 (x=0-0.75) series were studied up to 1000 K. The results reveal that the substitution of Y3+ for Ca2+ not only increases resistivity but also gradually alters the transport mechanism. The localization of carriers narrows bandwidth, which induces the evolution of the system from metal to variable-range hopping semiconductor and then to thermally activated semiconductor. The increasing thermopower with doping originates from the reduction of carrier concentration along with enhanced electronic correlations. Thermoelectric figure of merit ZT of Ca3Co4O9 system is improved by Y doping. However, the optimal thermoelectric performance is found to only exist at the critical doping level where doping-induced metal-semiconductor transition occurs. This result suggests an intrinsic correlation between transport mechanism and thermoelectric response in this system.
Funding OrganizationNational Natural Science Foundation of China ; Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
DOI10.1007/s00339-010-5543-1
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[50672019] ; National Natural Science Foundation of China[10804024] ; Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000277784300016
PublisherSPRINGER
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/99628
Collection中国科学院金属研究所
Corresponding AuthorSui, Yu
Affiliation1.Harbin Inst Technol, Dept Phys, Ctr Condensed Matter Sci & Technol, Harbin 150001, Peoples R China
2.Acad Sinica, Int Ctr Mat Phys, Shenyang 110015, Peoples R China
3.Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore
Recommended Citation
GB/T 7714
Wang, Yang,Sui, Yu,Cheng, Jinguang,et al. Influence of Y3+ doping on the high-temperature transport mechanism and thermoelectric response of misfit-layered Ca3Co4O9[J]. APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING,2010,99(2):451-458.
APA Wang, Yang,Sui, Yu,Cheng, Jinguang,Wang, Xianjie,Su, Wenhui,&Fan, Hongjin.(2010).Influence of Y3+ doping on the high-temperature transport mechanism and thermoelectric response of misfit-layered Ca3Co4O9.APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING,99(2),451-458.
MLA Wang, Yang,et al."Influence of Y3+ doping on the high-temperature transport mechanism and thermoelectric response of misfit-layered Ca3Co4O9".APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING 99.2(2010):451-458.
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