High Temperature Thermoelectric Response of Electron-Doped CaMnO3

doi:10.1021/cm901766y

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	High Temperature Thermoelectric Response of Electron-Doped CaMnO3
	Wang, Yang 2,4; Sui, Yu 2,3; Fan, Hongjin 4; Wang, Xianjie 2; Su, Yantao 2; Su, Wenhui 2; Liu, Xiaoyang 1
刊名	CHEMISTRY OF MATERIALS
	2009-10-13
卷号	21 期号:19 页码:4653-4660
ISSN号	0897-4756
DOI	10.1021/cm901766y
通讯作者	Sui, Yu(suiyu@hit.edu.cn)
英文摘要	We 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.
资助项目	National Natural Science Foundation of China[50672019] ; National Natural Science Foundation of China[10804024]
WOS研究方向	Chemistry ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000270461700039
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/98921]
专题	金属研究所_中国科学院金属研究所
通讯作者	Sui, Yu
作者单位	1.Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Peoples R China 2.Harbin Inst Technol, Dept Phys, CCMST, Harbin 150001, Peoples R China 3.Acad Sinica, Int Ctr Mat Phys, Shenyang 110015, Peoples R China 4.Nanyang Technol Univ, Div Phys, Sch Phys & Math Sci, Singapore 637371, Singapore
推荐引用方式 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.