Combining negative photoconductivity and resistive switching towards in-memory logic operations

Abstract

A family of rudorffites based on silver-bismuth-iodide shows a transition from a conventional positive photoconductivity (PPC) to an unusual negative photoconductivity (NPC) upon variation in the precursor stoichiometry in forming...

A polar-switchable and controllable negative phototransistor for information encryption

“…It is presumed that the smaller time constant (t 1 ) is associated with rapid generation of trapped states, and then large time constants (t 2 ) slow down the trapping process. 40 Fig. 3d suggests that the transient photoresponse of WSe 2 /CIPS FeFET shows fast response with the rise time (t r1 E 5.77s) and the decay time (t d1 E 0.28 s), respectively, indicating the possibility of the device for high-speed photoelectronic response application.…”

Pyro-Phototronic Effect in All-Inorganic Two-Dimensional Ruddlesden–Popper Ferroelectric Perovskite Thin-films and Photodetection

“…The behavior implies the presence and involvement of intrinsic defect states in the perovskite having the capability of trapping the photogenerated carriers. A fast generation of charge carriers upon illumination enhances the current followed by a partial trapping of photogenerated carriers due to the intrinsic charged point defects, resulting in slow decay of the photocurrent to a steady value . No such transient in the current was observed when the light was turned off.…”

Blue sensitive sub-band gap negative photoconductance in SnO2/TiO2 NP bilayer oxide transistor

“…[10][11][12][13] However, negative photoconductivity (NPC), a decrease in conductivity under light illumination, is an uncommon phenomenon that originates from the trapping of photo carriers due to defects. [14][15][16] Hence, NPC can be observed in low-dimensional materials such as InAs nanowires with core-shell structures 17 and with surfaces modified with molecular monolayers, 18,29 heavily-doped Si nanowire p-type ZnSe:Bi nanowires, 19 and 0D/ 2D heterostructures, 20,21 possessing intrinsically trap stateprone carrier densities. Moreover, there are many reports of NPC in nanostructured materials because of the desorption of ambient water molecules.…”