SrTi_(0.8)Nb_(0.2)O_3/Au纳米复合薄膜的制备及热电性能  

Fabrication and thermoelectric properties of the SrTi_(0.8)Nb_(0.2)O_3/Au nanocomposite thin films

作　　者：郭双[1] 付念[1] 吴晓琳[1] 王江龙[1] 王淑芳[1] GUO Shuang FU Nian WU Xiaolin WANG Jianglong WANG Shufang(College of Physics Science and Technology, Hebei University, Baoding 071002, China)

机构地区：[1]河北大学物理科学与技术学院,河北保定071002

出　　处：《河北大学学报（自然科学版）》2017年第4期355-359,共5页Journal of Hebei University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51372064);河北省自然科学基金资助项目(A2014201176;E2017201209);河北省教育厅基金资助项目(ZD2014018;QN2017017)

摘　　要：利用脉冲激光沉积技术制备了SrTi_(0.8)Nb_(0.2)O_3/Au纳米复合热电薄膜并研究了Au纳米颗粒的含量对薄膜热电性能的影响.实验结果表明,随着薄膜中Au纳米颗粒含量的增加,复合薄膜的载流子浓度和迁移率同时减小,导致复合薄膜的电阻率增大;此外,随着Au纳米颗粒含量的增加,复合薄膜的塞贝克系数绝对值因载流子浓度的增大及Au和SrTi_(0.8)Nb_(0.2)O_3界面势垒的能量过滤效应而增大.当Au原子百分比为0.94%时,复合薄膜的功率因子达到最大值,表明少量的纳米Au颗粒掺入可以有效地提升SrTi_(0.8)Nb_(0.2)O_3薄膜的热电性能.In this work, SrTi0.8Nb0.2O3/Au nanocomposite thin films were fabricated by pulsed laser deposition （PLD） method, and the effect of Au nanoparticles content on the thermoelectric properties of the films were investigated. With the increase of Au nanoparticles content, the electrical resistivity of the films increases due to the decreased carrier concentration and mobility. The absolute value of Seebeck coef- ficient of the films is also found to increase with the Au nanoparticles content, which is mainly caused by the increased carrier concentration and the carrier energy filtering effect of the interface barrier between Au and SrTi0.8Nb0.2O3. The film sample with Au nanoparticles content of 0.94% has the best power factor, indicating that the incorporation of a small amount of Au nanoparticles can improve the thermoelectric performance of SrTi0.8Nb0.2O3 thin films.

关 键 词：脉冲激光沉积 纳米复合薄膜 热电性能 

分 类 号：O469[理学—凝聚态物理]