Qi Bu, Zhen Fan, Xingyu Liu, Zhijie Luo, Yuhui Zheng, Qianming Wang
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引用次数: 0
Abstract
Halide perovskites have been considered as promising candidates for nonvolatile memory systems, but the specific study of structure–property relationship for such flexible framework is far from satisfied. The employment of bismuth avoids the toxicity of lead and instability of APbX3 structure, a new model of Cs3Bi2Br9 has been developed. The well control of crystal defects is achieved by the addition of low-molecular-weight molecule (citric acid (CA)) during solution phase synthesis. The switching window and device performance are further improved by incorporating Poly(methyl methacrylate) (PMMA) into the perovskite layer. Through synergistic additives treatment, the devices demonstrate bipolar resistive switching behavior with low operating voltages (± 0.6 V), significant ON/OFF ratio (104), stable cyclic retention (600 cycles), and prolonged retention times (> 300 s). These results offer new insights for the design of lead-free perovskite memory devices and will be beneficial to optimize the operating processes.
期刊介绍:
The objective of the Journal of Nanoparticle Research is to disseminate knowledge of the physical, chemical and biological phenomena and processes in structures that have at least one lengthscale ranging from molecular to approximately 100 nm (or submicron in some situations), and exhibit improved and novel properties that are a direct result of their small size.
Nanoparticle research is a key component of nanoscience, nanoengineering and nanotechnology.
The focus of the Journal is on the specific concepts, properties, phenomena, and processes related to particles, tubes, layers, macromolecules, clusters and other finite structures of the nanoscale size range. Synthesis, assembly, transport, reactivity, and stability of such structures are considered. Development of in-situ and ex-situ instrumentation for characterization of nanoparticles and their interfaces should be based on new principles for probing properties and phenomena not well understood at the nanometer scale. Modeling and simulation may include atom-based quantum mechanics; molecular dynamics; single-particle, multi-body and continuum based models; fractals; other methods suitable for modeling particle synthesis, assembling and interaction processes. Realization and application of systems, structures and devices with novel functions obtained via precursor nanoparticles is emphasized. Approaches may include gas-, liquid-, solid-, and vacuum-based processes, size reduction, chemical- and bio-self assembly. Contributions include utilization of nanoparticle systems for enhancing a phenomenon or process and particle assembling into hierarchical structures, as well as formulation and the administration of drugs. Synergistic approaches originating from different disciplines and technologies, and interaction between the research providers and users in this field, are encouraged.