Photoelectric properties of film heterostructures based on poly-N-Epoxypropylcarbazole and merocyanine dye

Давиденко, Н. А.; Ishchenko, A. A.; Korotchenkov, О. A.; Mokrinskaya, E. V.; Podolian, A. O.; Studzinsky, S. L.; Tonkopieva, L. S.

doi:10.1134/s1063785012100185

Cited by 6 publications

(5 citation statements)

References 13 publications

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“…In our systems case the potential of the non-illuminated (dark) surface becomes positive with respect to illuminated surface, because positive charged current carriers have the larger mobility. This confirms the p-type photoconductivity character of investigated PCFs [9,16,17]. The relatively slow photovoltaic response growth and very slow dark photovoltage relaxation kinetics character can be explained by a large influence of charge carriers capture on deep traps processes and low mobility of non-equilibrium charges in the PCFs.…”

Section: Resultssupporting

confidence: 78%

“…The results of these measurements were used to calculate the values of tanδ PH = (tanδ PH -tanδ 0 )/tanδ 0 and C PH = (C PH -C 0 )/C 0 , where tanδ PH , C PH , and tanδ 0 , C 0 are the loss tangent and capacitance after and before switching on the light. The photodielectrical measurements were carried out using a dielectric coefficient and loss factor testing set of the TR-9701 type (based on Schering bridge scheme), external sinus signal generator G3-33 as the alternating voltage source and F-582 null-indicator according to [14][15][16]. As a photoexcitation light source for the photovoltaic and photodielectric measurements, we used a white (3 mW) semiconductor light-emitting diode (508H245WC-2.2-MD).…”

Section: Scheme 1 Molecular Structures Of Studied Dyesmentioning

confidence: 99%

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Photoelectric Properties of Photoconducting Composites Based on Non-Photoconducting Polymers Doped by Triarylmethane and Xanthene Dyes

Studzinsky

2014

Molecular Crystals and Liquid Crystals

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The films of polymeric composites based on non-photoconducting polyvinyl alcohol and polystyrene doped by various concentration of xanthene and triarylmethane type dyes have been prepared. Their photophysical, electrical, and spectral properties have been investigated. It was shown, that all studied composite films exhibit photovoltaic properties and anomalous negative photoconductivity effect. The diffusion nature of observed photovoltaic effect was established. The features of photovoltaic effect and photoconductivity, as well as the possible negative photoconductivity mechanism are discussed.

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Section: Resultssupporting

confidence: 78%

Section: Scheme 1 Molecular Structures Of Studied Dyesmentioning

confidence: 99%

Photoelectric Properties of Photoconducting Composites Based on Non-Photoconducting Polymers Doped by Triarylmethane and Xanthene Dyes

Studzinsky

2014

Molecular Crystals and Liquid Crystals

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“…Mono-and multilayered as well as hybrid heterostructures based on inorganic and organic materials are widely used presently for development of photoelectric converters of solar energy [1][2][3][4][5]. Organic, in particular, polymethine dyes can serve here as the centers of light absorption and photogeneration of electric charge carriers.…”

Section: Introductionmentioning

confidence: 99%

Photoelectric properties of the photoconducting film composites based on ferrocenyl‐ and carbazolyl‐containing oligomer doped with polymethine dye

Давиденко

Ishchenko

et al. 2016

Materialwissenschaft Werkst

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New photosensitive polymeric film composites based on oligomer containing ferrocenyl and carbazolyl fragments doped with symmetric polymethine dye are synthesized. Their photoelectric properties are investigated. Photovoltaic properties of these composites are detected. The mechanisms and peculiarities of the photovoltaic and photodielectric effects are discussed.Keywords: Polymeric film composites / ferrocenyl-and carbazolyl-containing oligomer / polymethine dyes / photovoltaic / Dember effect / photodielectric effect / capture of charge carriers Schlüsselwörter: Polymer-Verbundfilme / ferrocenyl-und carbazolylhaltiges Oligomer / Polymethinfarbstoff / Fotovoltaik / Dember-Effekt / Fotodielektrikeffekt / Erfassung von Ladungsträgern

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“…У приготованих зразках вимірювали величину електричного потенціалу (VPH) вільної поверхні плівки щодо електрода ІTO до опромінення світлом, його (VPH) зміну під час (t) опромінення з боку прозорого електропровідного шару ІTO, а також після вимкнення світла. Для визначення фотовольтаїчних характеристик у зразках із вільною поверхнею плівки застосовували метод вимірювання потенціалу поверхні за допомогою динамічного зонда (модифікований метод Кельвіна [10][11]). Вибір цієї методики для досліджень обґрунтований тим, що в цьому випадку немає впливу контактної різниці потенціалу, яка виникає у зразках сендвіч-структури з електродами з різних матеріалів, на фотопроцеси в плівках.…”

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Synthesis and Photovoltaic Properties of Symmetric Bis-Azomethines With Acceptor Substituents in the 4,4'-Position

Ovdenko

Vyshnevskyi

Studzinsky

et al. 2019

Bull. T. Shevchenko Nat. Univ. Kyiv. Chem.

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Two new symmetric azomethine dyes capable of photoinduced isomerization were synthesized by condensing symmetric bis-aldehyde (obtained by the reaction of epichlorohydrin with 4-oxybenzaldehyde) with 4-nitroaniline and 4-chloroaniline, respectively. The yield of the target products decreases with the transition from nitro-substituted azomethine to chlorine-substituted. This is due to the greater basicity of the starting amines with nitro-substitution when increasing the acceptor force of the substituent complicates the course of the reaction. Azomethines are characterized by absorption with a maximum at 400–410 nm, which makes them sensitive to radiation with a blue component of the spectrum. The photoelectric properties of azomethines upon irradiation were investigated by the method of measuring the surface potential with the help of a Kelvin dynamic probe. The maximum value of the electric potential of the photosensitive films free surface during irradiation with white LED at I = 60 W/m2 is about 270 mV in the case of azomethine with a nitro group in the 4,4' position and about 125 mV in the case of azomethine with chlorine as a substituent. That is, the magnitude of the electric potential of the free surface decreases approximately twice during the transition from nitro substituent to chlorine. This may be explained by the fact that the photoinduced changes in azomethine with a higher acceptor substituent flow more quickly and with greater efficiency. But at the same time, the reverse changes when turning off the light are just as fast. For chlorine substituted azomethine samples, the reverse process proceeds rather slowly, which may indicate greater stability over time of the photochemically modified form in case of chlorine substitution compared to the nitro-substituted analogue. Thus, the synthesized azomethines can be used in the development of new photovoltaic media and recording media for optical information recording.

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Photoelectric properties of film heterostructures based on poly-N-Epoxypropylcarbazole and merocyanine dye

Cited by 6 publications

References 13 publications

Photoelectric Properties of Photoconducting Composites Based on Non-Photoconducting Polymers Doped by Triarylmethane and Xanthene Dyes

Photoelectric Properties of Photoconducting Composites Based on Non-Photoconducting Polymers Doped by Triarylmethane and Xanthene Dyes

Photoelectric properties of the photoconducting film composites based on ferrocenyl‐ and carbazolyl‐containing oligomer doped with polymethine dye

Synthesis and Photovoltaic Properties of Symmetric Bis-Azomethines With Acceptor Substituents in the 4,4'-Position

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