Cooperative regulation of electrical and thermal transport behavior enhancing the thermoelectric performance of SnTe
Cooperative regulation of electrical and thermal transport behavior enhancing the thermoelectric performance of SnTe
复制标题
电和热传输行为的协同调节增强 SnTe 的热电性能
DOI:
10.1016/j.mtphys.2021.100556
复制
发表时间:
2021-10
影响因子:
11.5
通讯作者:
Jiehe Sui
中科院分区:
文献类型:
--
作者:
Bo Cui;Yuxin Sun;Yiyue Jiang;Wenjing Shi;Xiaosong Zhou;Shuming Peng;Wei Cai;Fengkai Guo;Jiehe Sui
SnTe is a kind of promising candidates for medium temperature thermoelectric materials, while its thermoelectric properties are limited by not only the poor electrical transport properties caused by intrinsic high carrier concentration and large valence bands offset, but also the relatively high lattice thermal conductivity. In this work, the thermoelectric performance of Mn–Bi and Mn–Sb co-doped SnTe is investigated. As expected, Mn doping decreases the energy separation between the two valence band maxima, enabling improved Seebeck coefficient, the donor effect of Bi or Sb weakens the adverse effect of Mn doping on carrier concentration, and then a relatively high average power factor is achieved. More importantly, a variety of defects, including point defects, dislocations and nanoprecipitates, are introduced, which can scatter phonons in a wide frequency range and decrease the lattice thermal conductivity. Finally, the synergy of these effects yields a maximumZTof 1.14 at 873 K and an averageZTof 0.7 (300–873 K) in Sn0·88Bi0·04Mn0·08Te sample, and a maximumZTof 1.23 at 873 K and an averageZTof 0.73 (300–873 K) in Sn0·82Sb0·06Mn0·12Te sample.
登录
查看更多内容
影响因子:
15
作者:
Xiao Yu;Wu Haijun;Li Wei;Yin Meijie;Pei Yanling;Zhang Yang;Fu Liangwei;Chen Yuexing;Pennycook Stephen J.;Huang Li;He Jiaqing;Zhao Li-Dong
通讯作者:
Zhao Li-Dong
影响因子:
17.6
作者:
Xie Guizhen;Li Zhi;Luo Tingting;Bai Hui;Sun Jinchang;Xiao Yu;Zhao Li-Dong;Wu Jinsong;Tan Gangjian;Tang Xinfeng
通讯作者:
Tang Xinfeng
影响因子:
32.5
作者:
Wang, Heng;Gibbs, Zachary M.;Snyder, G. Jeffrey
通讯作者:
Snyder, G. Jeffrey
影响因子:
11.5
作者:
Zhang Yu;Sun Jinchang;Shuai Jing;Tang Xinfeng;Tan Gangjian
通讯作者:
Tan Gangjian
影响因子:
15.1
作者:
Qiang Zhang;X. Tan;Zhe Guo;Hongxiang Wang;Chenglong Xiong;Na Man;Fanfan Shi;Hao-yang Hu
通讯作者:
Qiang Zhang;X. Tan;Zhe Guo;Hongxiang Wang;Chenglong Xiong;Na Man;Fanfan Shi;Hao-yang Hu