GIEC OpenIR  > 中国科学院广州能源研究所
Enhanced asymmetrical transport of carriers induced by local structural distortion in chemically tuned titania: A possible mechanism for enhancing thermoelectric properties
Liu, C.1,2; Miao, L.1; Hu, D.3; Huang, R.4; Fisher, C. A. J.5; Tanemura, S.1,5,6; Gu, H.3
2013-11-07
发表期刊PHYSICAL REVIEW B
卷号88期号:20
摘要Optimizing all three thermoelectric properties (Seebeck coefficient, electrical conductivity, and thermal conductivity) simultaneously is a nontrivial task, especially for the Seebeck coefficient and electrical conductivity. Here, we demonstrate that chemically tuned rutile TiO2 sintered from N- and Nb-codoped nanoparticles possesses not only an enhanced power factor but also a decreased thermal conductivity. In samples produced under strongly reducing conditions, the electrical resistivity is decreased markedly to 3.96 x 10(-5) Omega m while maintaining a high Seebeck coefficient. In this manner, the power factor can be greatly improved to 9.87 x 10(-4) W m(-1) K-2 at 785 degrees C with a significantly enhanced figure of merit ZT of 0.35 at 700 degrees C. Theoretical modeling based on density functional theory suggests that enhanced asymmetrical carrier transport (i.e., with the minority carrier relatively localized on one side of the Fermi level but the majority carrier delocalized on the other) can be induced by locally distorting the crystal structure, since this imposes local perturbations on the intrinsic periodic potential field, which may be responsible for the improved power factor. The greatly improved thermoelectric behavior of chemically tuned rutile TiO2 provides a promising route to producing practical thermoelectric materials without the use of toxic heavy elements. Our findings also provide a promising new strategy for enhancing the thermoelectric properties of other thermoelectric materials.
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
DOI10.1103/PhysRevB.88.205201
研究领域[WOS]Physics
关键词[WOS]THERMAL-CONDUCTIVITY ; RUTILE TIO2 ; ELECTRONIC-STRUCTURE ; ANATASE TIO2 ; PERFORMANCE ; DIOXIDE ; OXIDES ; MERIT ; METAL ; POWER
收录类别SCI
语种英语
WOS类目Physics, Condensed Matter
WOS记录号WOS:000326821200001
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/9088
专题中国科学院广州能源研究所
太阳能系统应用实验室
作者单位1.Chinese Acad Sci, Key Lab Renewable Energy, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, State Key Lab High Performance Ceram & Superfine, Shanghai Inst Ceram, Shanghai 200050, Peoples R China
4.E China Normal Univ, Key Lab Polarized Mat & Devices, Minist Educ, Shanghai 200062, Peoples R China
5.Japan Fine Ceram Ctr, Atsuta Ku, Nagoya, Aichi 4568587, Japan
6.Nagoya Inst Technol, Powder Technol Project Lab, Showa Ku, Nagoya, Aichi 4668555, Japan
推荐引用方式
GB/T 7714
Liu, C.,Miao, L.,Hu, D.,et al. Enhanced asymmetrical transport of carriers induced by local structural distortion in chemically tuned titania: A possible mechanism for enhancing thermoelectric properties[J]. PHYSICAL REVIEW B,2013,88(20).
APA Liu, C..,Miao, L..,Hu, D..,Huang, R..,Fisher, C. A. J..,...&Gu, H..(2013).Enhanced asymmetrical transport of carriers induced by local structural distortion in chemically tuned titania: A possible mechanism for enhancing thermoelectric properties.PHYSICAL REVIEW B,88(20).
MLA Liu, C.,et al."Enhanced asymmetrical transport of carriers induced by local structural distortion in chemically tuned titania: A possible mechanism for enhancing thermoelectric properties".PHYSICAL REVIEW B 88.20(2013).
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Liu, C.]的文章
[Miao, L.]的文章
[Hu, D.]的文章
百度学术
百度学术中相似的文章
[Liu, C.]的文章
[Miao, L.]的文章
[Hu, D.]的文章
必应学术
必应学术中相似的文章
[Liu, C.]的文章
[Miao, L.]的文章
[Hu, D.]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。