DOI: https://doi.org/10.29363/nanoge.DEPERO.2023.016
Publication date: 14th September 2023
Halide perovskite (ABX3) has recently achieved great success in the field of electronic devices beyond photovoltaics. Compared to conventional memristive metal oxides, halide perovskite possesses multiple chemical elements, abundant defect types, and complete defect chemistry theory that are desired for high-performance memristors. The metal-halide electrochemical reaction mediated by migration of ion defects, the formation of lead clusters, together with the valence-change mechanism driven by halide vacancy can not only meet the demands of two-state, multi-state or even continuous and reversible switching of resistance, but also provide an ideal material model for study of the physical mechanism of memristors.
Here, the unique ionic-electronic coupled transport properties of nanosized perovskite films will be discussed first. The relation between the microscopic transport mechanism and the macroscopic resistance switching characteristic will be unraveled. These perovskite films are then employed to construct memristors from the bottom up, demonstrating low energy consumption and many important synaptic features. A coupled capacitive and inductive phenomenon originating from charge trapping and ion migration, controlled by amplitude and timing of the programming pulses, is observed for defining the degree of synaptic plasticity. To further improve the performance, a two-terminal synaptic memristor based on phase-pure and well-structured single crystals of perovskites is fabricated. The device exhibits extremely low power consumption (~26 fJ) on par with that of a bio-synapse. In particular, the synapse-like potentiation and depression under continuous stimulations can be reduplicated for more than 20000 cycles with excellent reproducibility, which makes the device one of the most stable and energy efficient artificial synapses reported to date. Finally, inspired by the device behaviors a simple proof-of-concept demonstration of the potential for neuromorphic computing is performed, i.e., classification application using the devices comprising neuron network.
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.