DOI: https://doi.org/10.29363/nanoge.neumatdecas.2023.029
Publication date: 9th January 2023
In the recent past, halide perovskites (HPs) have earned fame in the genre of optoelectronics and photovoltaics owing to their excellent optoelectronic properties. Besides optoelectronic traits, HPs also possess a plethora of charge migration pathways, inherent hysteresis, high charge-carrier and ionic mobilities which make them perfect candidates for resistive random access switching memories (RRAMs). However, due to material and electrical instability, the figures-of-merits (FOMs) namely retention, endurance and switching speed were not up to the state of-the-art standard until recently. In order to revolutionize HP Re-RAMs, we devised a novel structure where we replaced the thin-film architecture with vertically aligned high-density HP nanowires rooted in a porous alumina membrane (PAM) sandwiched between silver and aluminum contacts. The excellent passivation provided by the PAM imparted the electrical and material stability to the environmentally fragile HPs by drastically reducing the moisture aided attacks. Data retention time as long as 28.3 years and device endurance of 5 million cycles were obtained along with a switching speed of 100 ps and a down-scaled cell size of 14 nm was achieved. Besides data storage, the HP nanowires were utilized in developing neuromorphic devices possessing low power and high-precision computing functionalities. The nanowire based devices were made to operate in the electro-chemical metallization (ECM) mode and the non-electro-chemical metallization (non-ECM) mode by using silver and indium doped tin oxide as the top electrodes respectively, in order to obtain robust multi-level resistance states. The artificial neural networks tuned by the multi-level states thus obtained, was used to perform image processing tasks of outlining, sharpening and embossing in the ECM mode while the one in the non-ECM mode was utilized to emulate the cognitive learning model of Gestalt Closure Principle. All in all, our nanowire in PAM based architecture, uplifts HP RRAMs to the state-of-the-art standard in various applications concerning data storage and brain-inspired computing.
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.