(001)-oriented Cu2-ySe thin films with tunable thermoelectric performances grown by pulsed laser deposition

被引：19
作者：
Lv, Yanhong [1 ,2 ,3 ]
Chen, Jikun [2 ]
Zheng, Ren-Kui [1 ]
Shi, Xun [1 ,2 ]
Song, Junqiang [2 ]
Zhang, Tiansong [2 ]
Li, Xiaomin [1 ]
Chen, Lidong [1 ,2 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Mat Energy Convers, Shanghai 200050, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2015年 / 41卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Cu2-ySe thin films; Electrical transport; Phase transition; Thermoelectric; COPPER SELENIDE; SYSTEM;
D O I：
10.1016/j.ceramint.2015.02.062
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Highly (001)-oriented Cu2-ySe thin films with tunable thermoelectric performances have been grown by pulsed laser deposition. By using targets with different Cu/Se ratios that further determines the copper deficiency of as-grown films, the carrier concentrations of as-grown films are tuned within a broad range from 10(18) to 10(21) cm(-3). The optimum performance is observed at carrier concentration similar to 1.58 x 10(20) cm(-3). The distinct properties of Cu2-ySe thin films with nearly ideal chemical stoichiometric ratio are observed. In addition, a weak change in the electrical transport during the second-order phase transition was observed in the thin films due to the anisotropic structure of the Cu2-ySe. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码：7439 / 7445
页数：7
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