Induced Vacancy-Assisted Filamentary Resistive Switching Device Based on RbPbI3-xClx Perovskite for RRAM Application.
Ujjal DasDip DasBappi PaulTridip RabhaSoumya PattanayakAloke KanjilalSnigdha BhattacharjeePranab SarkarAsim RoyPublished in: ACS applied materials & interfaces (2020)
Halide perovskite (HP) materials are actively researched for resistive switching (RS) memory devices due to their current-voltage hysteresis along with low-temperature processability, superior charge mobility, and simple fabrication. In this study, all-inorganic RbPbI3 perovskite has been doped with Cl in the halide site and incorporated as a switching media in the Ag/RbPbI3-xClx/ITO structure, since pure RbPbI3 is nonswitchable. Five compositions of the RbPbI3-xClx (x = 0, 0.3, 0.6, 0.9, and 1.2) films are fabricated, and the conductivity was found to be increasing upon increase in Cl concentration, as revealed by dielectric and I-V measurements. The device with a 20% chloride-substituted film exhibits a higher on/off ratio, extended endurance, long retention, and high-density storage ability. Finally, a plausible explanation of the switching mechanism from iodine vacancy-mediated growth of conducting filaments (CFs) is provided using conductive atomic force microscopy (c-AFM). The c-AFM measurements reveal that pure RbPbI3 is insulating in nature, whereas Cl-doped films demonstrate resistive switching behavior.
Keyphrases
- atomic force microscopy
- room temperature
- solar cells
- high speed
- high density
- quantum dots
- single molecule
- high efficiency
- highly efficient
- visible light
- ionic liquid
- magnetic resonance imaging
- molecular docking
- magnetic resonance
- skeletal muscle
- genome wide
- perovskite solar cells
- dna methylation
- diabetic rats
- endothelial cells
- carbon nanotubes