DOI: https://doi.org/10.29363/nanoge.neuronics.2024.001
Publication date: 18th December 2023
Memristor-based multi-level memory systems are gradually breaking through the limitations of traditional binary logic systems in terms of critical figures of merit, such as low power operation, operating speed, and circuit complexity. Logic gates and functions have been demonstrated in various ways, confirming their potential as a useful emerging computing device. However, stateful logic's spatio-temporal efficiency is not good enough to supplant traditional computing technologies due to the random formation of conducting filament (CF). We present inter-quantized conductance (QC)-state switching in a highly reproducible and stable quaternary QC-state memristor based on Al/iPrP-PDI/ITO. Memristor shows excellent bipolar switching performance of high continuous cycling with large ON/OFF ratios and long retention time with low operating voltages, as well as being remarkably reproducible over two years. The switching parameters' temporal and spatial variability was studied using 880 cycles across ten devices and found to be highly reproducible [1]. Furthermore, during SET/RESET cycles, discrete quantized conductance states were detected in I-V traces due to the development of atomic point contacts in the conducting filaments. Compliance current (Ic) and stop voltage (Vs) were used to control the CF. QC states were analyzed statistically, and three distinguished QC states, i.e., 1G0± 0.5G0, 3.5G0± 0.5G0, 7.5G0± 0.5G0, were found to be reproducibly available as stable memory levels. Controllable interstate switching among these QC states was also observed. Control on various switching configurations, such as switching ON to different QC-states, switching OFF from QC, and controlled inter-state switching from one QC-state to another, has been demonstrated by imposing current compliance and stop-voltage, showing potential for implementation in multi-level logic. Overall, iPrP-PDI has the potential to be an excellent choice for durable, high-performance, and highly dense multi-level memory devices for practical applications.
Keywords: Quantized conductance; organic semiconductors; isopropyl phenyl-Perylenediimide(iPrP-PDI); multi-level memory; inter-state switching.
The author AB would like to acknowledge the Department of Science and Technology INSPIRE program for providing the research fellowship.
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.