Abstract
We report a stability scheme of resistive switching devices based on ZnO films deposited by radio frequency (RF) sputtering process at different oxygen pressure ratios. I-V measurements and statistical results indicate that the operating stability of ZnO resistive random access memory (ReRAM) devices is highly dependent on oxygen conditions. Data indicates that the ZnO film ReRAM device fabricated at 10% O2 pressure ratio exhibits the best performance. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) of ZnO at different O2 pressure ratios were investigated to reflect influence of structure to the stable switching behaviors. In addition, PL and XPS results were measured to investigate the different charge states triggered in ZnO by oxygen vacancies, which affect the stability of the switching behavior.
Original language | English (US) |
---|---|
Pages (from-to) | 1-18 |
Number of pages | 18 |
Journal | Nanoscale Research Letters |
Volume | 8 |
Issue number | 1 |
DOIs | |
State | Published - 2013 |
Externally published | Yes |
Bibliographical note
Funding Information:The authors greatly acknowledge Professor Tai-Bor Wu at the National Tsing Hua University. The research was supported by the National Science Council through grant nos. 101-2112-M-007-015-MY3, NSC 101-2120-M-007-003, and 101-2218-E-007-009-MY3, and the National Tsing Hua University through grant no. 102N2022E1. YL Chueh greatly appreciates the use of facility at CNMM, National Tsing Hua University through grant no. 102N2744E1.
Keywords
- O partial pressure
- Oxygen defects
- Resistive change memory
- ZnO
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics