The persistent photoconductivity (PPC) effect is a commonly observed behavior in SnO nanostructures. Here we described and studied this effect through a comparative study, based on measurements of electronic transport using network as well as single devices built from SnO nanowires under different experimental conditions. At room temperature, the PPC effect was observed to be more accentuated in single nanowire devices. It was found that nanowire-nanowire junctions play a fundamental role in the device behavior: the decay time of nanowire network (τ = 52 s) is about three orders of magnitude lower than those of single nanowire (τ = 4.57 × 10 s). Additionally, it was confirmed that the PPC effect was directly related to the amount of oxygen present in the environment and it is destroyed with increasing temperature. Furthermore, the PPC effect was interpreted based on the surface effect that depends on the capture/emission of electrons by the surface states.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1088/1361-6528/abb7b2 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Online dynamical learning and sequence memory with neuromorphic nanowire networks.
Nat Commun
November 2023
School of Physics, The University of Sydney, Sydney, NSW, Australia.
Nanowire Networks (NWNs) belong to an emerging class of neuromorphic systems that exploit the unique physical properties of nanostructured materials. In addition to their neural network-like physical structure, NWNs also exhibit resistive memory switching in response to electrical inputs due to synapse-like changes in conductance at nanowire-nanowire cross-point junctions. Previous studies have demonstrated how the neuromorphic dynamics generated by NWNs can be harnessed for temporal learning tasks.
View Article and Find Full Text PDFElectrical conductance of two-dimensional random percolating networks based on mixtures of nanowires and nanorings: A mean-field approach along with computer simulation.
Phys Rev E
March 2023
Laboratory of Mathematical Modeling, Astrakhan State University, Astrakhan 414056, Russia.
We have studied the electrical conductance of two-dimensional (2D) random percolating networks of zero-width metallic nanowires (a mixture of rings and sticks). We took into account the nanowire resistance per unit length and the junction (nanowire-nanowire contact) resistance. Using a mean-field approximation (MFA) approach, we derived the total electrical conductance of these nanowire-based networks as a function of their geometrical and physical parameters.
View Article and Find Full Text PDFUnusual effects of nanowire-nanowire junctions on the persistent photoconductivity in SnO nanowire network devices.
Nanotechnology
October 2020
LIEC, Instituto de Química, Universidade Estadual Paulista - UNESP, Araraquara, SP 14800-060, Brazil. NanOLaB, Departamento de Física, Universidade Federal de São Carlos, São Carlos, SP 13565-905, Brazil.
The persistent photoconductivity (PPC) effect is a commonly observed behavior in SnO nanostructures. Here we described and studied this effect through a comparative study, based on measurements of electronic transport using network as well as single devices built from SnO nanowires under different experimental conditions. At room temperature, the PPC effect was observed to be more accentuated in single nanowire devices.
View Article and Find Full Text PDFEmergent dynamics of neuromorphic nanowire networks.
Sci Rep
October 2019
International Center for Material Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan.
Neuromorphic networks are formed by random self-assembly of silver nanowires. Silver nanowires are coated with a polymer layer after synthesis in which junctions between two nanowires act as resistive switches, often compared with neurosynapses. We analyze the role of single junction switching in the dynamical properties of the neuromorphic network.
View Article and Find Full Text PDFImproved efficiency of hybrid organic photovoltaics by pulsed laser sintering of silver nanowire network transparent electrode.
ACS Appl Mater Interfaces
May 2015
‡Department of Electrical Engineering, Princeton University, Princeton, New Jersey United States.
In this Research Article, we demonstrate pulsed laser processing of a silver nanowire network transparent conductor on top of an otherwise complete solar cell. The macroscopic pulsed laser irradiation serves to sinter nanowire-nanowire junctions on the nanoscale, leading to a much more conductive electrode. We fabricate hybrid silicon/organic heterojunction photovoltaic devices, which have ITO-free, solution processed, and laser processed transparent electrodes.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!