Influence of Y3+ doping on the high-temperature transport mechanism and thermoelectric response of misfit-layered Ca3Co4O9

doi:10.1007/s00339-010-5543-1

IMR OpenIR

	Influence of Y3+ doping on the high-temperature transport mechanism and thermoelectric response of misfit-layered Ca3Co4O9
	Wang, Yang 1,3; Sui, Yu 1,2; Cheng, Jinguang 1; Wang, Xianjie 1; Su, Wenhui 1,2; Fan, Hongjin 3
通讯作者	Sui, Yu(suiyu@hit.edu.cn)
	2010-05-01
发表期刊	APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
ISSN	0947-8396
卷号	99 期号:2 页码:451-458
摘要	The 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.
资助者	National Natural Science Foundation of China ; Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
DOI	10.1007/s00339-010-5543-1
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] ; Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号	WOS:000277784300016
出版者	SPRINGER
引用统计	被引频次：16[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/321006/99628
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, 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
推荐引用方式 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.