Charge Transport in Molecularly Doped Polymers: Tests of the Correlated Disorder Model
Journal of Physical Chemistry. 2011. Vol. 115. No. 14. P. 6939-6947.
Schein L. B., Tyutnev A.
The correlated disorder model (CDM) has been proposed as a theory of charge transport in molecularly doped polymers (MDPs). Recently a test of the CDM was proposed: it was predicted that the dipolar disorder energy can be obtained from the slope of the log of the mobility versus square root of the electric field (the Poole-Frenkel or PF slope). We find that the dipolar disorder energy obtained from the experimental PF slopes are almost always larger than the theoretical predictions, especially for MDPs made from dopants with low dipole moments. In addition, the theory relates the dipolar disorder energy to the temperature T0 at which the electric field dependence of the mobility vanishes. We find that the observed T0 does appear to increase as the dipolar disorder increases but is in quantitative agreement (within 25 K) with the theoretical predictions for only a limited set of the measurements. We conclude that it appears that the CDM needs further development to be consistent with charge transport in organic materials.
Diffusion of a particle in the spatially correlated exponential random energy landscape: Transition from normal to anomalous diffusion
, Journal of Chemical Physics 2018 Vol. 148 No. 2 P. 024505-1-024505-10
Diffusive transport of a particle in a spatially correlated random energy landscape having exponential density of states has been considered. We exactly calculate the diffusivity in the nondispersive quasiequilibrium transport regime for the 1D transport model and found that for slow decaying correlation functions the diffusivity becomes singular at some particular temperature higher than the temperature of the ...
Added: July 12, 2018
, , , Chemical Physics 2011 Vol. 114 No. 389 P. 75-80
The dipolar disorder formalism (DDF) of Borsenberger and Bдssler has been further developed based on a unified approach treating the van der Waals and the dipolar disorder energies as being roportional to mean intersite distance in a certain power. Tested against real molecularly doped polymers with the concentration of the dopant changing in a wide ...
Added: April 12, 2012
, , 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
Comparative Monte-Carlo simulations of charge carrier transport in amorphous molecular solids as given by three most common models of disorder: The dipolar glass, the Gaussian disorder, and their mix
, , 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
Влияние предварительного электронного облучения на транспорт дырок в молекулярно допированном поликарбонате
, , et al., Химия высоких энергий 2010 Т. 44 № 5 С. 394-401
The effect of preliminary electron beam irradiation on hole transport in a molecularly doped polymer was studied with the use of the time of flight technique in the radiation_induced mode. Specimens that exhibit a plateau on their time of flight curves were selected for the study, since they suggest the occurrence of quasi equilibrium transport ...
Added: April 12, 2012
, , 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
, , 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
, , et al., 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 ...
Added: June 15, 2017
Charge carrier transport in molecularly doped polycarbonate as a test case for the dipolar glass model
, , 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
, , , 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
, , 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
, Эпистемология и философия науки 2019 Т. 56 № 1 С. 169-184
The framework of simple opposition realism - anti-realism is not enough to analyze the views on the reality of unobservable objects of quantum theory. First, it is necessary to distinguish between realism in relation to the theory and realism in relation to the theory’s objects. Secondly, realism in relation to classical objects can be combined, ...
Added: February 12, 2020
, , et al., Fungal Biology 2019 Vol. 123 No. 2 P. 140-150
Exploring life cycles of fungi is insightful for understanding their basic biology and can highlight their ecology. Here, we dissected the sexual and asexual life cycles of the obligate alkalophilic ascomycete Sodiomyces alkalinus that thrives at extremely high pH of soda lakes. Sodiomyces alkalinus develops acremonium-type asexual sporulation, commonly found in ascomycetous fungi. However, the ...
Added: October 3, 2019
Developing instruments to assess and compare the quality of engineering education: the case of China and Russia
, , et al., Assessment & Evaluation in Higher Education 2016 Vol. 41 No. 5 P. 770-786
Relatively little is known about differences in the quality of engineering education within and across countries because of the lack of valid instruments that allow for the assessment and comparison of engineering students’ skill gains. The purpose of our study is to develop and validate instruments that can be used to compare student skill gains ...
Added: April 7, 2016
Пятая Международная конференция «Системный анализ и информационные технологии» САИТ-2013 (19–25 сентября 2013 г., г.Красноярск, Россия): Труды конференции. В 2-х т.
Красноярск : ИВМ СО РАН, 2013
Труды Пятой Международной конференции «Системный анализ и информационные технологии» САИТ-2013 (19–25 сентября 2013 г., г.Красноярск, Россия): ...
Added: November 18, 2013
Моделирование внутреннего и поверхностного p-n переходов с минимальным топологическим размером 20 нм и электрическим воздействием на электроды (окончание)
, Качество. Инновации. Образование 2010 № 6 С. 55-63
В статье приведены результаты и качественный анализ 2D и 3D моделирования внутреннего и поверхностного p-n переходов с минимальным топологическим размером 20 нм с электрическим воздействием на электроды. Промоделированы 17 основных параметров наноструктур в 2D и 3D реализациях. Выявлены тонкие физические отличия, определены варианты технологической реализуемости. ...
Added: April 19, 2012
Unconventional superconductivity in low density electron systems and conventional superconductivity in hydrogen metallic alloys
, JETP Letters 2016 Vol. 103 No. 11 P. 728-738
In this short review, we first discuss the results, which are mainly devoted to the generalizations of the famous Kohn–Luttinger mechanism of superconductivity in purely repulsive fermion systems at low electron densities. In the context of repulsive-U Hubbard model and Shubin–Vonsovsky model we consider briefly the superconducting phase diagrams and the symmetries of the order parameter ...
Added: November 18, 2016
St. Petersburg : [б.и.], 2019
ADMInC'19 is organised by Saint Petersburg Electrotechnical University "LETI" and the IEEE Russia North-West Section to provide a platform sharing findings and new ideas, and discuss problems as well as to provide an effective networking platform for researchers in the field of antenna technology, electromagnetics, antenna measurements and wave propagation. Along with the All-Russia Conference on Antennas and Propagation 2019 (in ...
Added: November 24, 2019
Саратов : IEEE, 2018
В докладах научно-технической конференции нашли отражение результаты теоретических и экспериментальных исследований в области электродинамики и микроволновой техники, микроволновой электроники, наноэлектроники, силовой электроники, полупроводниковой электроники, электроэнергетики, систем измерительной и медицинской техники. Излагаются результаты исследования резонаторных и замедляющих систем, устройств СВЧ, приборов вакуумной, плазменной и микроэлектроники, технологические вопросы изготовления изделий электронной техники. Сборник состоит из двух томов ...
Added: October 16, 2018
, , , Промышленные АСУ и контроллеры 2011 № 10 С. 33-38
В статье рассматривается подсистема автоматического интеллектуального управления микроклиматом. Интеллектуальная подсистема позволяет автоматически оценивать состояние микроклимата и управлять системой вентиляции, учитывая нормативные рекомендации по созданию благоприятного микроклимата в обслуживаемом помещении. ...
Added: April 19, 2012
, / ИКИ АН СССР. Серия 0 "Препринт ИКИ АН СССР". 1984. № Пр-875.
Added: April 1, 2013
М. : National Instruments Russia, 2017
Содержание сборника составляют доклады с результатами оригинальных исследований и технических решений, ранее не публиковавшиеся. Мы надеемся, что предлагаемый сборник окажется полезным для специалистов, работающих в различных областях науки и техники, для широкого круга преподавателей, аспирантов и студентов ВУЗов, а также для преподавателей средних школ и технических колледжей. ...
Added: May 10, 2017
, , et al., Вестник машиностроения, СТИН 2015 № 9 С. 39-42
The method of multipurpose decision making as a problem of fuzzy programming is considered. For expression of desire levels the method of preferences determination of criteria and achievability assessment is used. ...
Added: October 17, 2015
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