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High Temperature Thermoelectric Response of Electron-Doped CaMnO3
Wang, Yang1,3; Sui, Yu1,2; Fan, Hongjin3; Wang, Xianjie1; Su, Yantao1; Su, Wenhui1; Liu, Xiaoyang4
Corresponding AuthorSui, Yu(suiyu@hit.edu.cn)
2009-10-13
Source PublicationCHEMISTRY OF MATERIALS
ISSN0897-4756
Volume21Issue:19Pages:4653-4660
AbstractWe report a systematical investigation on the high temperature thermoelectric response of Ca1-xRxMnO3 (R = rare-earth) perovskites in the electron-doped range. The results reveal that electron concentration is the dominant factor for the high temperature electrical transport properties whereas the weight and size of R ions dominate the thermal transport properties. As the doping level varies, the best thermoelectric performance is observed at the relative electron concentration around 0.1. However, in the case of a fixed electron concentration, structural distortions become important since bandwidth has an observable influence on resistivity. By combining the three factors, electron concentration, crystal structure, and the weight/size of R ions, the largest thermoelectric figure of merit ZT for Ca1-xRxMnO3 reaches 0.2 at 1000 K. But this ZT value is still too far from the application criterion (ZT > 1). Using the dynamical mean field theory, we demonstrate that a ZT value larger than one in electron-doped CaMnO3 systems seems rather unlikely. Some strategies for searching new thermoelectric materials with high performance in transition metal oxides are proposed.
Funding OrganizationNational Natural Science Foundation of China
DOI10.1021/cm901766y
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[50672019] ; National Natural Science Foundation of China[10804024]
WOS Research AreaChemistry ; Materials Science
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary
WOS IDWOS:000270461700039
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:103[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/98922
Collection中国科学院金属研究所
Corresponding AuthorSui, Yu
Affiliation1.Harbin Inst Technol, Dept Phys, CCMST, Harbin 150001, Peoples R China
2.Acad Sinica, Int Ctr Mat Phys, Shenyang 110015, Peoples R China
3.Nanyang Technol Univ, Div Phys, Sch Phys & Math Sci, Singapore 637371, Singapore
4.Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Peoples R China
Recommended Citation
GB/T 7714
Wang, Yang,Sui, Yu,Fan, Hongjin,et al. High Temperature Thermoelectric Response of Electron-Doped CaMnO3[J]. CHEMISTRY OF MATERIALS,2009,21(19):4653-4660.
APA Wang, Yang.,Sui, Yu.,Fan, Hongjin.,Wang, Xianjie.,Su, Yantao.,...&Liu, Xiaoyang.(2009).High Temperature Thermoelectric Response of Electron-Doped CaMnO3.CHEMISTRY OF MATERIALS,21(19),4653-4660.
MLA Wang, Yang,et al."High Temperature Thermoelectric Response of Electron-Doped CaMnO3".CHEMISTRY OF MATERIALS 21.19(2009):4653-4660.
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