Memory effect of an organic photoconductor and its application to a neuron model

Abstract

A new type of organic photoconductor composed of 9-ethylcarbazole-3-carbaldehyde diphenylhydrazone (DPH) dispersed in a polycarbonate polymer (PCR) film, when in the presence of thio-Michler’s ketone (TMK), was found to exhibit a sustained state of enhanced conductivity following visible irradiation. At room temperature, the enhanced current is observed to decay slowly over a period of a day and when heated it rapidly returns to its original state. A potential application of this ‘‘memory’’ effect to an artificial neuron model, using such memory-type organic photoconductors as optically controllable interconnections, is discussed. A liquid-crystal cell is used to demonstrate a nonlinear-saturated response dependent on a weighted input electric signal.

Synthesis, characterization, biological activity, and thermal stability of new styrenic polymer having pendant ketone and its some derivatives

“…Polymers with carbonyl functional groups have been particularly interesting because they being used as photoresists to make large‐scale integrated circuits, printing plates, photocurable coatings [5], photoconductors [6], energy‐exchange materials [7], enzyme fixing materials [8], protecting groups in organic syntheses [9], and photosensitizers of organic syntheses [10, 11].…”

Crystalline Organic Molecular Thin Film with Electrical Switching Property: Scanning Probe Microscopy and Optical Spectroscopy Study

“…Organic molecular thin films are extremely attractive due to their adaptability, simplicity, and low cost of manufacturing. These unique advantages make them suitable for potential applications in ultrafast molecular electronic devices and nanoscale data storage. − Traditionally, organic functional films are made of two or more components. However, the inhomogeneity of different components in the film may result in poorly ordered polycrystalline or even amorphous films with a large density of defects, and consequently leads to poor device performance.…”