High Temperature Thermoelectric Response of Electron-Doped CaMnO3

doi:10.1021/cm901766y

IMR OpenIR

	High Temperature Thermoelectric Response of Electron-Doped CaMnO3
	Wang, Yang 1,3; Sui, Yu 1,2; Fan, Hongjin 3; Wang, Xianjie 1; Su, Yantao 1; Su, Wenhui 1; Liu, Xiaoyang 4
通讯作者	Sui, Yu(suiyu@hit.edu.cn)
	2009-10-13
发表期刊	CHEMISTRY OF MATERIALS
ISSN	0897-4756
卷号	21 期号:19 页码:4653-4660
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.
资助者	National Natural Science Foundation of China
DOI	10.1021/cm901766y
收录类别	SCI
语种	英语
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
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary
WOS记录号	WOS:000270461700039
出版者	AMER CHEMICAL SOC
引用统计	被引频次：156[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/98922
专题	中国科学院金属研究所
通讯作者	Sui, Yu
作者单位	1.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
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.