Effect of microstructure on the thermoelectric properties of CSD-grown Bi_2Sr_2Co_2O_y thin films

作     者：王淑芳 闫国英 陈珊珊 白子龙 王江龙 于威 傅广生 

作者机构：College of Physics Science and TechnologyHebei University School of Information EngineeringHebei University of Technology 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2013年第22卷第3期

页      面：453-456页

核心收录：

学科分类：08[工学] 0803[工学-光学工程] 

基　　金：Project supported by the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 10904030) the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20091301120002 ) 

主　　题：thermoelectric properties Bi2Sr2Co2Oy thin films microstructure chemical solution deposition 

摘      要：Three Bi2Sr2Co2Oy thin films with different microstructures have been prepared by chemical solution deposition on LaAlO 3（001） through varying the annealing *** the decrease in the annealing temperature,both the size and c-axis alignment degree of grains in the film decrease as well,leading to an increase in the film *** addition,the decrease in the annealing temperature also results in a slight increase in the Seebeck coefficient due to the enhanced energy filtering effect of the small-grain *** nanostructured Bi2Sr2Co2Oy film with an average grain size of about 100 nm shows a power factor comparable to that of films with larger *** the thermal conductivity of the nanostructured films can be depressed due to the enhanced phonon scattering by grain boundary,a higher figure of merit is expected in Bi2Sr2Co2Oy thin film with grains in nanometer size.