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The Nature of Plateau on Time-of-Flight Curves in Molecularly Doped Polymers
Polymer Science - Series A. 2017. Vol. 59. No. 4. P. 575-578.
Abstract—Transient current curves in a polar molecularly doped polymer for subsurface and bulk generations of charge carriers are compared. No transformation of the horizontal plateau on the former to the curve predicted by the diffusion and drift theory was found, contrary to expectations for quasi-equilibrium transport conditions. This behavior indicates a nonequilibrium character of the transport of charge carriers. The plateau appearance is explained in our case by the depleted subsurface layer effect, as we already pointed out earlier.
Keywords: молекулярно допированные полимерытранспорт носителей зарядаmolecularly doped polymersкривые переходного токаTransient current curvestransport of charge carriers
Publication based on the results of:
49601782, Ikhsanov R., Novikov S. V., Chemical Physics 2014 Vol. 440 P. 1-7
We have compared time-of-flight curves predicted by hopping and multiple trapping models with the Gaussian and exponential site/trap energy distributions, fitting Monte-Carlo predictions of the former with numerical calculations of the latter in a wide time domain using logarithmic coordinates lg j–lg t for the characterization of current shapes and an estimation of transit times. As a ...
Added: February 28, 2015
A.P. Tyutnev, S.V. Novikov, V.S. Saenko et al., Journal of Chemical Physics 2017 Vol. 147 No. 11 P. 114901-1-114901-8
We have performed Monte-Carlo simulations of the charge carrier transport in a model molecularly doped polymer using three most popular hopping theories (the dipolar glass model, the Gaussian disorder model, and an intermediate between them) in a wide range of applied electric fields and temperatures. Time of flight transients have been computed and analyzed in ...
Added: September 15, 2017
A.P.Tyutnev, R.Sh. Ikhsanov, V.S. Saenko et al., Chemical Physics 2018 Vol. 503 P. 65-70
We have performed numerical analysis of the charge carrier transport in a specific molecularly doped
polymer using the multiple trapping model. The computations covered a wide range of applied electric
fields, temperatures and most importantly, of the initial energies of photo injected one-sign carriers
(in our case, holes). Special attention has been given to comparison of time of ...
Added: February 12, 2018
Novikov S. V., Tyutnev A., Schein L. B., Chemical Physics 2012 No. 403 P. 68-73
Using Monte Carlo simulation we investigated time of flight current transients predicted by the dipolar glass model for a random spatial distribution of hopping centers. Behavior of the carrier drift mobility was studied at room temperature over a broad range of electric field and sample thickness. A flat plateau
followed by current decay is the most ...
Added: November 7, 2012
A.P. Tyutnev, B.L. Linetskiy, A.V. Nikerov et al., Russian Journal of Physical Chemistry B 2015 Vol. 9 No. 4 P. 648-657
Abstract—A theoretical analysis of the nonlinear field dependence of the pulsed radiationinduced conductiv ity of polystyrene in strong electric fields is performed. An explanation of the previously uncomprehended phe nomenon of the sharp increase in the radiationinduced electrical conductivity in the presence of an electric field with a strength of above 5 × 107 V/m ...
Added: January 18, 2016
49601782, Ikhsanov R., 49601816 et al., Journal of Applied Physics 2020 Vol. 128 No. 225501 P. 1-8
Numerical calculations have been performed on the time of flight transients predicted by a newly developed model describing consistently the radiation-induced conductivity of common insulating polymers under both pulsed and continuous irradiation. The model differs substantially from the conventional multiple trapping formalism based on an exponential trap distribution by the presence of additional deep traps distributed in energy ...
Added: December 5, 2020
Dunlap D. H., Schein L. B., Tyutnev A. et al., Journal of Physical Chemistry 2010 Vol. 114 No. 19 P. 9076-9088
The mechanism of charge transport in molecularly doped polymers has been the subject of much discussion over the years. In this paper, data obtained from a new experimental variant of the time-of-flight (TOF) technique, called TOF1a, are compared to the predictions of a two-layer multiple trapping model (MTM) with an exponential distribution of traps. In ...
Added: April 12, 2012
49601782, Novikov S. V., Journal of Chemical Physics 2013 Vol. 138 No. 104120 P. 1-9
We present the results of Monte Carlo simulations of the charge carrier transport in a disordered molecular system containing spatial and energetic disorders using the dipolar glass model. Model parameters of the material were chosen to fit a typical polar organic photoconductor polycarbonate doped with 30% of aromatic hydrazone, whose transport properties are well documented ...
Added: April 3, 2013
А.П. Тютнев, Б.Л. Линецкий, А.В. Никеров et al., Химическая физика 2015 Т. 34 № 7 С. 58-61
A theoretical analysis of the peculiarities of the nonlinear field dependence of radiation-pulse conductivity of polystyrene in strong electric fields. The explanation of previously misunderstood the rapid increase of the radiation conductivity in electric fields, the intensity of which exceeds 5E7 V/m. this behavior cannot be explained on the basis of the Onsager theory for ...
Added: May 25, 2015
Novikov S. V., / Cornell University. Series cond-mat "arxiv.org". 2022. No. 2209.14955.
Charge transport in amorphous semiconductors having spatially correlated exponential density of states (DOS) has been considered for the arbitrary behavior of the correlation function of random energies. Average carrier velocity is exactly calculated for the quasi-equilibrium (nondispersive) transport regime. For the symmetric exponential DOS with exponential tails for low and high energies and non-positive correlation ...
Added: November 1, 2022
Chistyakov A., Zvaigzne M., Nikitenko V. et al., The Journal of Physical Chemistry Letters 2017 Vol. 8 No. 17 P. 4129-4139
Quantum dot (QD) solids represent a new type of condensed matter drawing high fundamental and applied interest. Quantum confinement in individual QDs, combined with macroscopic scale whole materials, leads to novel exciton and charge transfer features that are particularly relevant to optoelectronic applications. This Perspective discusses the structure of semiconductor QD solids, optical and spectral ...
Added: October 7, 2017
Tyutnev A., Ихсанов Р. Ш., Abrameshin A. E. et al., Высокомолекулярные соединения. Серия А 2013 Т. 55 № 3 С. 306-311
Abstract—The general problems of the bimolecular recombination of charge carriers in molecularly doped polycarbonate are discussed. Experimental studies are performed via the transient radiationinduced conductivity method. Transientcurrent curves are numerically calculated via the multiple trapping model. The calculated and experimental curves are in good agreement. It is shown that the studied molecularly doped polymer undergoes ...
Added: April 10, 2013
Weiss D., Andrey P. Tyutnev, Evgenii D. Pozhidaev, Journal of Physical Chemistry 2015 Vol. 119 No. 3 P. 5334-5340
ABSTRACT: The time-of-flight (TOF) transients of solution-cast, free-standing films of N,N′-diphenyl-N,N-bis(3-methylphenyl)-[1,1′-biphenyl]-4,4′diamine (TPD) in bisphenol A polycarbonate (PC) have been studied using electron gun induced charge generation. This molecularly doped polymer (MDP) has been shown to exhibit perfectly flat plateaus on its time-of-flight curves with optical excitation. Our TOF results with continuously changing electron energies, as ...
Added: May 24, 2015
Омельченко О. Д., Грибкова О. Л., Тамеев А. Р. et al., Физикохимия поверхности и защита материалов 2014 Т. 50 № 5 С. 512-518
Two techniques of manufacturing a nanocomposite based on a complex of polyaniline with polymer acid and graphene are proposed. The electric conductivity of thin nanocomposite layers is higher than that of a polymer complex of polyaniline and strongly depends on the degree of oxidation of graphene. An explanation of the effect is suggested that takes ...
Added: February 28, 2015
A. P. Tyutnev, A. V. Nikerov, V. S. Saenko, et al., Polymer Science - Series A 2015 Vol. 57 No. 1 P. 94-100
Abstract—The multipletrapping model with a Gaussian trap distribution was used for the numerical analysis of the effects of nonequilibrium transport on the temperature dependence and field dependence of the mobility of carriers in a typical molecularly doped polymer. It was shown that, with allowance for the prescribed Poole–Frenkel Frenkel type field dependence of mobility under ...
Added: May 24, 2015
A. P. Tyutnev, V.S. Saenko, A.E. Abrameshin, Polymer Science - Series A 2016 Vol. 58 No. 5 P. 818-824
Carried out direct experimental comparison of the field dependence of the drift and the effective mobility of holes in the polar molecularly doped polymer, the polycarbonate containing 30 wt. % diphenylhydrazone -diethylaminobenzaldehyde) based on the method of time-of-flight in volumetric irradiation samples of polymer with a pulse of fast electrons. Numerical simulation of time-of-flight experiment ...
Added: June 3, 2016
Fishchuk I. I., Kadasnchuk A., Novikov S. V. et al., Molecular Crystals and Liquid Crystals 2014 Vol. 589 P. 18-28
We report on the influence of the lateral electric field on the charge mobility in organic field-effect transistors (OFET) based on C 60 films with multigrain morphology. The experimental data were quantitatively described using a recent analytical model by accounting for the strong local electric fields in a multigrain transistor channel and for the energy ...
Added: March 4, 2015
Martynov Y., Nazmitdinov R., Moia-Pol A. et al., Physical Chemistry Chemical Physics 2017 Vol. 19 No. 30 P. 19916-19921
Organometal triiodide perovskites are promising, high-performance absorbers in solar cells. Considering the perovskite as a thin film absorber, we solve transport equations and analyse the efficiency of a simple heterojunction configuration as a function of electron–hole diffusion lengths. We found that for a thin film thickness of ~1 micron the maximum efficiency of ~31% could ...
Added: September 29, 2017
Ихсанов Р. Ш., Tyutnev A., Saenko V. S. et al., Высокомолекулярные соединения. Серия А 2013 Т. 55 № 2 С. 201-208
Abstract - A program for numerical computation of the curves of the transient current in samples of molecularly doped polymers has been developed with allowance for the presence of a defective surface layer in them. Time-of-flight curves are calculated with the multiple-trapping model with a Gaussian energy distribution of traps. The model parameters are determined ...
Added: April 15, 2013
Tyutnev A., Ikhsanov R., Saenko V. S. et al., Электрохимия 2012 Т. 48 № 2 С. 208-216
Theoretical and experimental studies of the carrier transport in molecularly doped polymers (MDPs) have been reported. Theoretical analysis uses the multiple trapping (MT) model with an exponential and Gaussian trap distributions. Experimental technique is based on an electron gun technology enabling one to conduct time of flight measurements using the surface and the bulk carrier ...
Added: November 21, 2012
Antipov A., Seleznev V., Vakhtomin Y. et al., IOP Conference Series: Materials Science and Engineering (MSE) 2020 Vol. 781 No. 1 P. 012011-1-012011-5
Spectral characteristics of WSi and NbN superconducting single-photon detectors with different surface resistance and width of nanowire strips have been investigated in the wavelength range of 1.3-2.5 µm. WSi structures with narrower strips demonstrated better performance for detection of single photons in longer wavelength range. The difference in normalized photon count rate for such structures ...
Added: December 10, 2020
Budkov Y., Kolesnikov A. L., Polymer Science - Series C 2018 Vol. 60 No. Supplement 1 P. 148-159
Theoretical models of the conformational behavior of flexible polymer chains in mixed solvents enunciated in the world literature during the last decade are critically reviewed. Models describing different mechanisms of coil-to-globule transitions in a good solvent induced by cosolvent addition are highlighted. Special attention is given to the analysis of theoretical approaches to describing the ...
Added: November 30, 2018
Kalmykov A., Melentiev P., Balykin V., Laser Physics Letters 2020 Vol. 17 No. 4 P. 045901
In this paper we present measurements and comparison of SPP propagation length at the practically important telecom wavelength (1560 nm) as well as in the near-infrared and visible spectral ranges. The measurements were carried out for plane SPP waves excited on Ag film surface using optical microscopy of SPP waves in the far field. We ...
Added: January 15, 2021
M. : Faculty of Physics, MSU, 2017
The Low Temperature Physics Conference is an international event held every three years, under the auspices of the IUPAP through its Commission C5 on Low Temperature Physics. The aim of these conferences is to exchange information and views among the members of the international scientific community in the general field of Low Temperature Physics. It ...
Added: October 1, 2017