Evaluation of the energy distribution of trap states in polymer films

Nakaryakov, A. S.; Лачинов, А. Н.; Ponomarev, A. F.; Tseplin, E. E.; Antipin, V. A.

doi:10.1134/s1063783411120171

Cited by 8 publications

(3 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Comparing the results of the analysis of the rearranged curves with the data obtained by other methods, it can be noted that the results correlate with the previously studied ones by traditional techniques of TSC, TSD and optical measurements [8,9] (Fig. 3).…”

Section: Resultssupporting

confidence: 82%

Study of Current-Voltage Characteristics of Electroactive Polymers Placed in Non-Equilibrium Thermodynamic Conditions

Vorobjev

Ponomarev

Лачинов³

2016

MSF

View full text Add to dashboard Cite

The article proposes a method of studying the localized states (“traps”) in the band gap of dielectrics. The method combines both the method of current-voltage characteristics and the method of thermally stimulated currentIt is intended to use the method for analyzing the materials, in which trapping states are quasi-continuously distributed. The article gives an example of using the method for studying of the advanced polymer material - polydiphenylenephthalide. It presents calculation of values of the activation energies and the depth of the traps. The results are compared with the data obtained by traditional methods.

show abstract

Section: Resultssupporting

confidence: 82%

Study of Current-Voltage Characteristics of Electroactive Polymers Placed in Non-Equilibrium Thermodynamic Conditions

Vorobjev

Ponomarev

Лачинов³

2016

MSF

View full text Add to dashboard Cite

show abstract

“…In a several papers [ 42 , 43 ], it has been experimentally shown that it is possible to form deep electronic states and a narrow conduction band near the Fermi level in thin dielectric films. In [ 42 ], this conclusion was based on the analysis of the current-voltage characteristics measured near the dielectric-conductor junction within the framework of the injection current model [ 44 ].…”

Section: Methodsmentioning

confidence: 99%

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

Karamov,

Galiev,

Lachinov

et al. 2023

Polymers

View full text Add to dashboard Cite

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.

show abstract

“…Three types of electron traps at energies of 0.5, 1.06, and 2.4 eV from the bottom of the conduction band have been identified in PDP films [9]. The depths of the above chemical electron traps in a poly mer film, with inclusion of the polarization energy calcu lated as described in [10], are ~1.7, ~1.2, and ~2.4 eV (table) for the anthrone (and "open" phthalide), "closed" phthalide, and anthraquinone groups, respectively.…”

mentioning

confidence: 99%