scholarly journals Влияние примеси самария на локальную структуру халькогенидного стеклообразного полупроводника Se-=SUB=-95-=/SUB=-Te-=SUB=-5-=/SUB=- и механизм прохождения тока через структуры Al-Se-=SUB=-95-=/SUB=-Te-=SUB=-5-=/SUB=-<Sm>-Te

2019 ◽  
Vol 53 (12) ◽  
pp. 1655
Author(s):  
С.У. Атаева ◽  
С.И. Мехтиева ◽  
А.И. Исаев ◽  
С.Н. Гарибова ◽  
А.С. Гусейнова
Keyword(s):  
Chalcogenide Glasses ◽  
Stationary Mode ◽  
Force Microscopy ◽  
Atomic Force ◽  
Current Voltage ◽  
Semiconductor System ◽  
Glassy Semiconductor ◽  
Current Voltage Characteristics ◽  
Injection Currents ◽  
Chalcogenide Glassy Semiconductor

Effect of samarium doping on the local structure and morphological features of films surface of the Se95Te5 chalcogenide glassy semiconductor system have been investigated by X-ray analysis and atomic force microscopy methods, and the influence of doping on the current passing mechanism through the Al-Se95Te5 <Sm> -Te structures have been also considered by measuring the current-voltage characteristics in a stationary mode. The results obtained are interpreted on the basis of the theory of Lampert injection currents, the Elliott void-cluster model and the Mott and Street charged defect model proposed for chalcogenide glasses.

Atomic Force Microscopy of the Local Electrical Properties of Bilayer Polyaniline-Polystyrene/P(VDF-TrFE) Composite

2021 ◽  
Vol 899 ◽  
pp. 506-511
Author(s):  
Artem V. Budaev ◽  
Ivanna N. Melnikovich ◽  
Vasily E. Melnichenko ◽  
Nikita A. Emelianov
Keyword(s):  
Atomic Force Microscopy ◽  
Electrical Properties ◽  
Polymer Nanocomposite ◽  
Charge Carriers ◽  
Force Microscopy ◽  
Atomic Force ◽  
Current Voltage ◽  
Current Voltage Characteristics ◽  
Piezoelectric Force Microscopy ◽  
Microscopy Techniques

Atomic force microscopy techniques (conductive-AFM, I-V spectroscopy and PFM) were used for characterisation of the local electrical properties of bilayer polyaniline-polystyrene/P(VDF-TrFE) polymer nanocomposite. Observed hysteresis of current-voltage characteristics confirms its memristive properties. It was caused by the influence of the ferroelectric polarization of P(VDF-TrFE) layer, the domain structure of which was visualised by piezoelectric force microscopy on the transport of charge carriers at the interface.

scholarly journals WIDTH OF ENERGY BAND GAP OF NANOPOROUS SEMICONDUCTOR FILMS

2020 ◽  
Vol 17 (2) ◽  
pp. 39-44
Author(s):  
Z.Zh. Zhanabaev ◽  
Keyword(s):  
Porous Silicon ◽  
Band Gap ◽  
Electrochemical Etching ◽  
Semiconductor Films ◽  
Energy Band Gap ◽  
Laser Illumination ◽  
Current Voltage ◽  
Glassy Semiconductor ◽  
Current Voltage Characteristics ◽  
Chalcogenide Glassy Semiconductor

The aim of this work is to experimentally clarify the reasons for the appearance of jumps in the current and memory of semiconductor nanoporous structures.Porous nanostructures were obtained by electrochemical etching. The current-voltage characteristics of the samples were measured for porous silicon and on thin films of a chalcogenide glassy semiconductor. The existence of jump-like switching and current hysteresis in porous silicon nanofilms under laser illumination is shown experimentally.A connection between the switching voltage values and the dependence of the band gap on the porosity of nanofilms is found. These results make it possible to construct a theory of current switching and its hysteresis based on the concepts of the theory of second-order phase transitions.

scholarly journals Investigation of electrolysis-related modification of graphene films in biosensors

2021 ◽  
Vol 2103 (1) ◽  
pp. 012103
Author(s):  
I A Eliseyev ◽  
A S Usikov ◽  
S P Lebedev ◽  
A D Roenkov ◽  
M V Puzyk ◽  
...  
Keyword(s):  
Low Frequency ◽  
Frequency Noise ◽  
Kelvin Probe ◽  
Force Microscopy ◽  
Atomic Force ◽  
Graphene Films ◽  
Current Voltage ◽  
Current Voltage Characteristics ◽  
Electrolysis Mode ◽  
Modification Of The Surface

Abstract In this work, the modification of the surface parameters of graphene chips after electrolysis treatment in a NaClO4 aqueous solution has been studied. Two electrolysis modes have been analysed. In the first one, a negative potential (-0.2 V) is applied to the graphene chips, while in the second one the potential is positive (0.8 V). Investigation using a number of techniques including atomic force microscopy, Kelvin probe force microscopy, Raman spectroscopy, measurements of current-voltage characteristics and low-frequency noise has shown that the electrolysis mode with application of a positive potential on graphene chips decreases the 1/f noise and allows one to obtain a uniform surface potential distribution while leaving the graphene structure undamaged. The results of this study help to understand the efficiency and reproducibility of the procedure for electrolysis treatment of graphene chips.

scholarly journals Study of the charge transfer process in the polyaniline/graphite heterojunction by conductive atomic force microscopy

2020 ◽  
pp. 94-98
Author(s):  
N. A. Davletkildeev ◽  
Keyword(s):  
Atomic Force Microscopy ◽  
Oxidative Polymerization ◽  
Pyrolytic Graphite ◽  
Thin Layers ◽  
Conductive Atomic Force Microscopy ◽  
Force Microscopy ◽  
Atomic Force ◽  
Current Voltage ◽  
Current Voltage Characteristics

Thin layers of polyaniline on the surface of highly oriented pyrolytic graphite are obtained by in-situ chemical oxidative polymerization of aniline. The current-voltage characteristics of the tip/polyaniline/graphite contact, which have a form characteristic of tunnel contacts, have been measured by the method of conducting atomic force microscopy. By modeling the current-voltage characteristics using the Simmons model, the width of the potential barrier is determined, which for the investigated heterojunction is 0,5 nm

scholarly journals Проводимость композитных пленок на основе проводящего полимера PEDOT : PSS, оксида графена и наночастиц TiO-=SUB=-2-=/SUB=- для контактных слоев перовскитных фотовольтаических структур

2019 ◽  
Vol 61 (4) ◽  
pp. 773
Author(s):  
А.А. Базанова ◽  
В.Н. Петров ◽  
А.Н. Алешин
Keyword(s):  
Titanium Dioxide Nanoparticles ◽  
Composite Films ◽  
Conductive Polymer ◽  
Charge Carriers ◽  
Globular Structure ◽  
Force Microscopy ◽  
Atomic Force ◽  
Current Voltage ◽  
Current Voltage Characteristics ◽  
Perovskite Photovoltaic

AbstractThe electrical properties of composite films based on conductive polymer PEDOT: PSS, graphene oxide (GO), and titanium dioxide nanoparticles (TiO_2) (PEDOT: PSS– TiO_2 and GO–TiO_2) used as contact layers of organic and perovskite photovoltaic structures have been studied. As a result of the study of morphology by atomic force microscopy, it was found that the PEDOT: PSS–TiO_2 and GO–TiO_2 films have a globular structure with a grain size of ~200–300 nm. The current–voltage characteristics of the PEDOT: PSS–TiO_2 and GO–TiO_2 films are measured in the temperature range of 80–300 K, the dependences of the resistivity versus temperature, ρ( T ), which have an activation character, are obtained. It is established that as the temperature decreases, the ρ( T ) dependences show a transition from large values of the activation energy (570 meV and 329 meV) to lower values (25 meV and 2.2 meV) for the PEDOT: PSS–TiO_2 and GO–TiO_2 films, respectively. The mechanisms of transport of charge carriers in the materials studied are discussed.

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