J. Mater. Sci. Technol. ›› 2022, Vol. 109: 12-19.DOI: 10.1016/j.jmst.2021.08.068

• Research Article • Previous Articles     Next Articles

Large linear electrostrain of acceptor-donor Co-doped ZnO films

Chang Gaoa,1, Yu Zhaoa,c,1, Weili Lia,b,*(), Yulong Qiaoa, Zhao Wanga, Lu Jinga, Jie Shengc, Wei-Dong Feia,d,*()   

  1. aSchool of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
    bNational Key Laboratory of Science and Technology on Precision Heat Processing of Metals, Harbin Institute of Technology, Harbin 150001, China
    cLaboratory for Space Environment and Physical Science, Research Center of Basic Space Science, Harbin Institute of Technology, Harbin 150001, China
    dState Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China
  • Received:2021-04-28 Revised:2021-08-17 Accepted:2021-08-30 Published:2022-05-20 Online:2021-10-31
  • Contact: Weili Li,Wei-Dong Fei
  • About author:wdfei@hit.edu.cn (W.-D. Fei).
    * E-mail addresses: wlli@hit.edu.cn (W. Li),
    First author contact:1These authors contributed equally.

Abstract:

In this paper we present the effective strategy of Fe3+ and Li+ co-doping to enhance the electrostrain of ZnO thin films. Zn0.88(Fe0.06Li0.06)O thin film exhibits an excellent d33* value of 415 pm/V and large linear electrostrain of 0.68% after thermal-electric treatment. Both the X-ray diffraction and first principle calculation results have indicated that the Fe3+ and Li+ ions are inclined to adopt a preferential alignment along the edges approximately parallel to [001] direction in the zinc-oxygen tetrahedron and constitute a defect dipole (ionic pairs). It is considered that the local lattice distortion and the electric field-triggered polarization extension and rotation generated by preferential distributed Fe3+-Li+ionic pairs are responsible for the outstanding piezoelectric properties and large linear electrostrain.

Key words: Zno, Piezoelectric, Donor-acceptor ionic pairs, Local lattice distortion, Lead-free