Tunable resistance switching in solution processed chromium-doped strontium titanate nanoparticles films.
In this work, resistance switching behaviours in solution processed chromium (Cr)-doped strontium titanate (SrTiO3) films have been investigated. Undoped SrTiO3film shows I-V characteristics of typical nonlinear resistor and no resistance hysteresis loops are observed. On the contrary, Cr-doped SrTiO3films show stable and reversible hysteresis loops, which can be controlled by applying different voltage bias. Based on a series of characterization results, including X-ray diffraction (XRD), Raman and X-ray photoelectron spectroscopy (XPS), we infer that Ti4+is substituted by Cr3+, giving rise to increased concentration of oxygen vacancies. Therefore, the observed resistance switching phenomenon is attributed to voltage driven oxygen vacancy migration. Furthermore, gradually decreased overall resistance is also realized under repeated sweeping cycles.
School of Materials Science and Engineering, The University of New South Wales, Sydney 2052, Australia.
Tao
T
Wan
School of Materials Science and Engineering, The University of New South Wales, Sydney 2052, Australia.
Bo
B
Qu
School of Materials Science and Engineering, The University of New South Wales, Sydney 2052, Australia.
Haiwei
H
Du
School of Materials Science and Engineering, The University of New South Wales, Sydney 2052, Australia.
Xi
X
Lin
School of Materials Science and Engineering, The University of New South Wales, Sydney 2052, Australia.
Peiyuan
P
Guan
School of Materials Science and Engineering, The University of New South Wales, Sydney 2052, Australia.
Qianru
Q
Lin
School of Materials Science and Engineering, The University of New South Wales, Sydney 2052, Australia.
Nan
N
Chen
School of Materials Science and Engineering, The University of New South Wales, Sydney 2052, Australia.
Thiam
T
Teck Tan
State Key Laboratory of Metal Matrix Composites, School of Material Science and Engineering, Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Shanghai Jiao Tong University, Shanghai, People's Republic of China. Electronic address: hangtao@sjtu.edu.cn.
Tao
T
Hang
School of Materials Science and Engineering, The University of New South Wales, Sydney 2052, Australia. Electronic address: d.chu@unsw.edu.au.
Dewei
D
Chu
Cr-doped SrTiO(3); Oxygen vacancies; Resistance switching; Solution processed