Study of the charge carrier transport through a metal-poly(arylenephthalide)-class polymer interface

Yusupov, A. R.; Rakhmeev, R. G.; Лачинов, А. Н.; Kalimullina, L. R.; Nakaryakov, A. S.; Bunakov, A. A.

doi:10.1134/s1063783413070342

Cited by 12 publications

(3 citation statements)

References 9 publications

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“…For non-conjugated polymers, this level is often located in the middle of the gap between the upper occupied orbital and the lower vacant one. The experimental measurement of the height of the potential barrier confirmed the validity of this statement [61]. It should be noted that the inexplicably underestimated height of the potential barrier [62] in a structure with a polymer boundary had been repeatedly noted previously, corresponding to the value determined according to Equation (2).…”

Section: Influence Of the Electrode Materialssupporting

confidence: 78%

Non-Conjugated Poly(Diphenylene Phthalide)—New Electroactive Material

Karamov,

Galiev,

Lachinov

et al. 2023

Polymers

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In organic electronics, conjugated conductive polymers are most widely used. The scope of their application is currently very wide. Non-conjugated polymers are used much less in electronics and are usually used as insulation materials or materials for capacitors. However, the potential of non-conjugated polymers is much wider, due to the fact that new electronic materials with unique electronic properties can be created on the basis of non-conjugated polymers, as well as other inorganic dielectrics. This article demonstrates the possibilities of creating electrically conductive materials with unique electronic parameters based on non-conjugated polymers. The results of the study of the sensory properties of humidity are given as examples of the practical application of the structure. The abnormal electronic properties are realized along the interface of two polymer dielectrics with functional polar groups. The submicron films of polydiphenylenephthalide were used as a dielectric. It is shown that a quasi-two-dimensional electronic structure with abnormally large values of conductivity and mobility of charge carriers occurs along the interface. These structures are often called quasi-two-dimensional electron gas (Q2DEG). This article describes the manufacturing processes of multielectrode devices. Polymer films are deposited via the spin-coating method with polymer solutions in cyclohexanone. The metal electrodes were manufactured through thermal deposition in a vacuum. Three types of metal electrodes made of aluminum, copper and chromium were used. The influence of the electron work function of contacting metals on the electronic parameters of the structure was studied. It was established that the work function decrease leads to an increase in the conductivity and mobility of charge carriers. The charge carrier parameters were estimated based on the analysis of the current-voltage characteristics within the space-charge-limited current technique. The Richardson-Schottky thermionic emission model was used to evaluate values a potential barrier at metal/organic interfaces. It was established that the change in ambient humidity strongly affects the electronic transport properties along the polymer/polymer interface. It is demonstrated that the increase in conductivity with an increase in humidity occurs due to an increase in the mobility of charge carriers and a decrease in the height of the potential barrier at the three-dimensional metal contact with two-dimensional polymer interface. The potential barrier between the electrode and the bulk of the polymer film is significantly higher than between the electrode and the quasi-two-dimensional polymer structure.

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Section: Influence Of the Electrode Materialssupporting

confidence: 78%

Non-Conjugated Poly(Diphenylene Phthalide)—New Electroactive Material

Karamov,

Galiev,

Lachinov

et al. 2023

Polymers

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“…The role of lateral fragments of molecule (containing the paramagnetic oxygen) for the electron transport in polymer film have just been emphasized [7]. The explanation that the magnetic field initiates the liberation of trapped electrons is confirmed by the fact that the CVC for decreasing bias voltage are disposed higher, than ones for the increasing bias voltage.…”

Section: Resultsmentioning

confidence: 96%

The Effect of the External Magnetic Field on the Wide Band Gap Polymer Conductivity

Воробьева

Лачинов

Latypova

2014

J Supercond Nov Magn

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The polydiphenylenephtalide (PDP) films of submicron thickness can reversibly switch their conductivity from dielectric to quasi-metallic state with changing their boundary conditions. The intermediate conductivity state "semi-conducting" can also be obtained. The metallic conductivity is characterized by quasi-one-dimensional conductive channels with diameters of 10-100 nm. PDP molecule contains only C, H, and O atoms. The behavior of PDP films out-of-plane conductivity with in-plane magnetic field is studied with current-voltage characteristics (CVC) method. In dielectric state, the films have some volumetric conductivity, so the magnetic field suppresses the conductivity, as it must be because of the Hall effect. When the boundary conditions are changed to provide the "semi-conductive" state, some quasi-one-dimensional conducting channels are partially switching on. So the Hall effect is being suppressed in these sectors, and the previously trapped electrons become free just enlarging conductivity with the magnetic field enhancement. When the film is shifted to quasi-metallic state with linear CVC, the processes of enlarging the conductivity with the magnetic field enhancement become prevailing.

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“…Для анализа влияния изменения параметров контакта на границе In/полимер на транспорт носителей заряда была проведена оценка высоты потенциального барьера для электронов в зависимости от концентрации допанта. Ранее в работах [25][26][27] было показано, что преобладающим механизмом переноса заряда в структуре металл−ПДФ−металл при комнатных температурах и аналогичных полях является термоэлектронная эмиссия Шоттки. В этом случае плотность тока термоэлектронной эмиссии с учетом понижения барьера за счет приложенного внешнего поля задается уравнением (5):…”

Section: объекты и методы исследованияunclassified

Допирование Несопряженного Полимера Органическим Соединением С Двумя Устойчивыми Энергетическими Состояниями

Карамов¹,

Лачинов²,

Пшеничнюк³

et al. 2021

Журнал Технической Физики

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We investigate the effect of doping by a small-molecular-weight organic compound phenolphthalein of non-conjugated polymer polydiphenylenephthalide. It is known that phenolphthalein has two energetically stable states - neutral and charged, as a result of the capture of an excess electron. The morphology of polymer films surfaces observed by atomic force microscopy. Analysis of the current-voltage characteristics showed that an increase of the dopant concentration leads to an increase in conductivity. Mounted connection nontrivial fact conductivity growth and mobility of charge carriers with increasing dopant concentration. At same time, an increase in the concentration of the dopant does not lead to a significant change in the charge-carrier concentration.

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Study of the charge carrier transport through a metal-poly(arylenephthalide)-class polymer interface

Cited by 12 publications

References 9 publications

Non-Conjugated Poly(Diphenylene Phthalide)—New Electroactive Material

Non-Conjugated Poly(Diphenylene Phthalide)—New Electroactive Material

The Effect of the External Magnetic Field on the Wide Band Gap Polymer Conductivity

Допирование Несопряженного Полимера Органическим Соединением С Двумя Устойчивыми Энергетическими Состояниями

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