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(
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
Indexed BySCI
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
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Cited Times:103[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
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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