Light‐Induced Synaptic Effects Controlled by Incorporation of Charge‐Trapping Layer into Hybrid Perovskite Memristor

Abstract

Organic‐inorganic perovskites despite being known for their extraordinary performance in solar cell research areas are also a workhorse in the field of unconventional information processing. Here, a neuromimetic behaviour is presented in a perovskite device with the potential to act as an artificial synapse. In addition, perovskite layer is combined with one of the non‐stoichiometric polymeric forms of carbon nitride (C3N4). Such a device can operate not only according to the principles of non‐von Neumann architecture but also utilizes two different stimuli as information carriers–electric current and/or light. This in turn can lead towards the development of next‐generation information processing/storage units.

Photo‐Enhanced Resistive Switching Effect in High‐Performance MAPbI3 Memristors

“…[25] Zawal et al found light-based synaptic-like effects, which was an important step toward the optical artificial synapses. [26] In the above phenomenon, the HRS or LRS varied according to the illumination, meaning RS behaviors would be regulated by both optical and electric fields.…”

A Mesoporous CuO/CuSe Heterojunction Nanocomposite with Applications in Visible‐Light Photocatalysis and as an Electrochemical Phenol Sensor

“…Further excitation at 370 nm generates a broad photoluminescence emission with a peak maximum at 430 nm along with two shoulder peaks (Figure S5a). Generally, the associated trap‐state on the surface of the nanoparticles gives such type of electronic transitions for shoulder peak generation (Figure S5b) [45,46] . We have identified the lifetime of the highest peak which is 0.0997439±0.0420794 ns.…”

“…Generally, the associated trap-state on the surface of the nanoparticles gives such type of electronic transitions for shoulder peak generation (Figure S5b). [45,46] We have identified the lifetime of the highest peak which is 0.0997439 � 0.0420794 ns.…”

Low Switching Power Neuromorphic Perovskite Devices with Quick Relearning Functionality

“…[3] Halide perovskites have ABX 3 structure, where A is a monovalent organic cation such as methylammonium and formamidinium, B is a divalent metal cation such as Pb 2+ or Sn 2+ , and X is a halide such as Cl − , Br − or I − , has emerged as a potential candidate owing to their high defect tolerance, low defect formation energies, compositional and optical bandgap flexibility, and light/electric pulse induced stimulation possibilities. [4][5][6][7][8][9][10] The key processes, such as hysteresis, defect formation, and non-radiative recombination, which are detrimental to photovoltaic application act as favorable characteristics for the neuromorphic synaptic devices. Recently, methylammonium lead triiodide (MAPbI 3 ) based synaptic devices exhibiting synaptic behaviors concerning photonic and electronic stimulations were reported.…”

“…Recently, methylammonium lead triiodide (MAPbI 3 ) based synaptic devices exhibiting synaptic behaviors concerning photonic and electronic stimulations were reported. [5,6,10,11] However, due to the unfavorable intrinsic phase transition and poor thin film surface morphology, very few attempts were made with formamidinium cation-based perovskites for their neuromorphic properties.…”