Aslan Abduev - Academia.edu (original) (raw)

Papers by Aslan Abduev

Chinese Science Bulletin, 2012

High performance Pt counter electrode is prepared by using vacuum thermal decomposition at a rela... more High performance Pt counter electrode is prepared by using vacuum thermal decomposition at a relatively low (120°C) temperature on a flexible polyethylene naphthalate substrate coated with indium-doped tin oxide for use in flexible dye-sensitized solar cells. The obtained Pt counter electrode shows a good chemical stability, high light transmittance, and high electrocatalytic activity for the I 3  /I  redox reaction. The energy conversion efficiency of a flexible dye-sensitized solar cell based on the prepared Pt counter electrode and a TiO 2 /Ti photoanode reaches 5.14% under a simulated solar light irradiation with intensity of 100 mW cm 2 .

SID Symposium Digest of Technical Papers

Bulletin of the Moscow State Regional University (Physics and Mathematics), 2019

Аннотация. Изучено влияние состава потока реагентов на условия формирования и структуру слоёв на ... more Аннотация. Изучено влияние состава потока реагентов на условия формирования и структуру слоёв на основе ZnO. Показано, что ключевым резервом в увеличении электропроводности и подвижности носителей заряда прозрачных электродов на основе ZnO:Ga является повышение структурного совершенства слоёв. Анализ полученных результатов исследований показывает, что увеличение парциального давления паров металла в газовой фазе влечёт за собой соответствующее увеличение подвижности компонентов и увеличение кристаллического совершенства синтезируемых поликристаллических слоёв. Ключевые слова: физика твёрдого тела, прозрачный электрод, сопротивление, температура, синтез.

Materials, Aug 25, 2022

This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY

SID Symposium Digest of Technical Papers, 2019

Promising approaches to improve electrical characteristics, chemical resistance, and thermal stab... more Promising approaches to improve electrical characteristics, chemical resistance, and thermal stability of the resistivity of ZnO-based TCO thin films are investigated. The following ways were tested: a) gradient doping of ZnO grains into the synthesized TCO films by indium in order to create passivating coatings on the surface of the grains; b) preventing the oxygen diffusion into the films by suppressing the columnar structures formation; c) methods combining the above ones. It was found that in the ZnO-based TCO films deposited by magnetron sputtering at temperature above 150°C under the presence of excess zinc in the reagent flow, a decrease in the porosity of the columnar ZnO films is observed after subsequent heat treatments in air. The introducing of In, Ga, Sn metals to the composition of the ZnO films contributes to the formation of thin surface oxide sub-layers with passivation properties on the surface of the ZnO grains. The results of research clearly show that preventing the formation of a columnar structure in combination with the passivation of grain surfaces creates real prospects for expanding the areas of application of ZnO-based transparent electrodes.

SID Symposium Digest of Technical Papers, 2019

Promising approaches to improve electrical characteristics, chemical resistance, and thermal stab... more Promising approaches to improve electrical characteristics, chemical resistance, and thermal stability of the resistivity of ZnO-based TCO thin films are investigated. The following ways were tested: a) gradient doping of ZnO grains into the synthesized TCO films by indium in order to create passivating coatings on the surface of the grains; b) preventing the oxygen diffusion into the films by suppressing the columnar structures formation; c) methods combining the above ones. It was found that in the ZnO-based TCO films deposited by magnetron sputtering at temperature above 150°C under the presence of excess zinc in the reagent flow, a decrease in the porosity of the columnar ZnO films is observed after subsequent heat treatments in air. The introducing of In, Ga, Sn metals to the composition of the ZnO films contributes to the formation of thin surface oxide sub-layers with passivation properties on the surface of the ZnO grains. The results of research clearly show that preventing the formation of a columnar structure in combination with the passivation of grain surfaces creates real prospects for expanding the areas of application of ZnO-based transparent electrodes.

Plasma Processes and Polymers, 2015

Ga-doped ZnO (GZO) thin films are recently raising both scientific and industrial interests, due ... more Ga-doped ZnO (GZO) thin films are recently raising both scientific and industrial interests, due to the lack of natural resources. Indium is a crucial raw material, due to ITO modern touchscreen market. By doping ZnO with Ga conductive transparent thin films with various concentrations of dopant are prepared by DC magnetron sputtering from ceramic targets. It is shown how the Ga content plays an important role on the growth kinetics on an initial stage of the film formation and hence on the morphologies, microstructure and electrical properties of as-grown GZO films. A mechanism explaining the role of Ga content on the nucleation process and the structure of growing films is proposed. Based on this mechanism, it is successfully demonstrated that the crystalline quality and hence the conductivity of GZO thin films can be improved by using a GZO buffer layer.

Journal of the Korean Physical Society, 2008

Materials

The development of optoelectronic devices based on flexible organic substrates substantially decr... more The development of optoelectronic devices based on flexible organic substrates substantially decreases the possible process temperatures during all stages of device manufacturing. This makes it urgent to search for new transparent conducting oxide (TCO) materials, cheaper than traditional indium-tin oxide (ITO), for the low-temperature deposition of transparent electrodes, a necessary component of most optoelectronic devices. The article presents the results of a vertically integrated study aimed at the low-temperature production of TCO thin films based on a zinc-indium oxide (ZIO) system with acceptable functional characteristics. First, dense and conducting ceramic targets based on the (100-x) mol% (ZnO) + x mol% (In2O3) system (x = 0.5, 1.5, 2.5, 5.0, and 10.0) were synthesized by the spark plasma sintering method. The dependences of the microstructure and phase composition of the ZIO ceramic targets on the In2O3 content have been studied by powder X-ray diffraction, scanning ele...

Solar Energy Materials and Solar Cells, 2007

physica status solidi (c), 2010

Ga-doped ZnO (GZO) thin films are recently raising both scientific and industrial interests, due ... more Ga-doped ZnO (GZO) thin films are recently raising both scientific and industrial interests, due to the lack of natural resources. Indium is a crucial raw material, due to ITO modern touchscreen market. By doping ZnO with Ga conductive transparent thin films with various concentrations of dopant are prepared by DC magnetron sputtering from ceramic targets. It is shown how the Ga content plays an important role on the growth kinetics on an initial stage of the film formation and hence on the morphologies, micro-structure and electrical properties of as-grown GZO films. A mechanism explaining the role of Ga content on the nucleation process and the structure of growing films is proposed. Based on this mechanism, it is successfully demonstrated that the crystalline quality and hence the conductivity of GZO thin films can be improved by using a GZO buffer layer.

Chinese Science Bulletin, 2012

High performance Pt counter electrode is prepared by using vacuum thermal decomposition at a rela... more High performance Pt counter electrode is prepared by using vacuum thermal decomposition at a relatively low (120°C) temperature on a flexible polyethylene naphthalate substrate coated with indium-doped tin oxide for use in flexible dye-sensitized solar cells. The obtained Pt counter electrode shows a good chemical stability, high light transmittance, and high electrocatalytic activity for the I 3  /I  redox reaction. The energy conversion efficiency of a flexible dye-sensitized solar cell based on the prepared Pt counter electrode and a TiO 2 /Ti photoanode reaches 5.14% under a simulated solar light irradiation with intensity of 100 mW cm 2 .

SID Symposium Digest of Technical Papers

Bulletin of the Moscow State Regional University (Physics and Mathematics), 2019

Аннотация. Изучено влияние состава потока реагентов на условия формирования и структуру слоёв на ... more Аннотация. Изучено влияние состава потока реагентов на условия формирования и структуру слоёв на основе ZnO. Показано, что ключевым резервом в увеличении электропроводности и подвижности носителей заряда прозрачных электродов на основе ZnO:Ga является повышение структурного совершенства слоёв. Анализ полученных результатов исследований показывает, что увеличение парциального давления паров металла в газовой фазе влечёт за собой соответствующее увеличение подвижности компонентов и увеличение кристаллического совершенства синтезируемых поликристаллических слоёв. Ключевые слова: физика твёрдого тела, прозрачный электрод, сопротивление, температура, синтез.

Materials, Aug 25, 2022

This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY

SID Symposium Digest of Technical Papers, 2019

Promising approaches to improve electrical characteristics, chemical resistance, and thermal stab... more Promising approaches to improve electrical characteristics, chemical resistance, and thermal stability of the resistivity of ZnO-based TCO thin films are investigated. The following ways were tested: a) gradient doping of ZnO grains into the synthesized TCO films by indium in order to create passivating coatings on the surface of the grains; b) preventing the oxygen diffusion into the films by suppressing the columnar structures formation; c) methods combining the above ones. It was found that in the ZnO-based TCO films deposited by magnetron sputtering at temperature above 150°C under the presence of excess zinc in the reagent flow, a decrease in the porosity of the columnar ZnO films is observed after subsequent heat treatments in air. The introducing of In, Ga, Sn metals to the composition of the ZnO films contributes to the formation of thin surface oxide sub-layers with passivation properties on the surface of the ZnO grains. The results of research clearly show that preventing the formation of a columnar structure in combination with the passivation of grain surfaces creates real prospects for expanding the areas of application of ZnO-based transparent electrodes.

SID Symposium Digest of Technical Papers, 2019

Promising approaches to improve electrical characteristics, chemical resistance, and thermal stab... more Promising approaches to improve electrical characteristics, chemical resistance, and thermal stability of the resistivity of ZnO-based TCO thin films are investigated. The following ways were tested: a) gradient doping of ZnO grains into the synthesized TCO films by indium in order to create passivating coatings on the surface of the grains; b) preventing the oxygen diffusion into the films by suppressing the columnar structures formation; c) methods combining the above ones. It was found that in the ZnO-based TCO films deposited by magnetron sputtering at temperature above 150°C under the presence of excess zinc in the reagent flow, a decrease in the porosity of the columnar ZnO films is observed after subsequent heat treatments in air. The introducing of In, Ga, Sn metals to the composition of the ZnO films contributes to the formation of thin surface oxide sub-layers with passivation properties on the surface of the ZnO grains. The results of research clearly show that preventing the formation of a columnar structure in combination with the passivation of grain surfaces creates real prospects for expanding the areas of application of ZnO-based transparent electrodes.

Plasma Processes and Polymers, 2015

Ga-doped ZnO (GZO) thin films are recently raising both scientific and industrial interests, due ... more Ga-doped ZnO (GZO) thin films are recently raising both scientific and industrial interests, due to the lack of natural resources. Indium is a crucial raw material, due to ITO modern touchscreen market. By doping ZnO with Ga conductive transparent thin films with various concentrations of dopant are prepared by DC magnetron sputtering from ceramic targets. It is shown how the Ga content plays an important role on the growth kinetics on an initial stage of the film formation and hence on the morphologies, microstructure and electrical properties of as-grown GZO films. A mechanism explaining the role of Ga content on the nucleation process and the structure of growing films is proposed. Based on this mechanism, it is successfully demonstrated that the crystalline quality and hence the conductivity of GZO thin films can be improved by using a GZO buffer layer.

Journal of the Korean Physical Society, 2008

Materials

The development of optoelectronic devices based on flexible organic substrates substantially decr... more The development of optoelectronic devices based on flexible organic substrates substantially decreases the possible process temperatures during all stages of device manufacturing. This makes it urgent to search for new transparent conducting oxide (TCO) materials, cheaper than traditional indium-tin oxide (ITO), for the low-temperature deposition of transparent electrodes, a necessary component of most optoelectronic devices. The article presents the results of a vertically integrated study aimed at the low-temperature production of TCO thin films based on a zinc-indium oxide (ZIO) system with acceptable functional characteristics. First, dense and conducting ceramic targets based on the (100-x) mol% (ZnO) + x mol% (In2O3) system (x = 0.5, 1.5, 2.5, 5.0, and 10.0) were synthesized by the spark plasma sintering method. The dependences of the microstructure and phase composition of the ZIO ceramic targets on the In2O3 content have been studied by powder X-ray diffraction, scanning ele...

Solar Energy Materials and Solar Cells, 2007

physica status solidi (c), 2010

Ga-doped ZnO (GZO) thin films are recently raising both scientific and industrial interests, due ... more Ga-doped ZnO (GZO) thin films are recently raising both scientific and industrial interests, due to the lack of natural resources. Indium is a crucial raw material, due to ITO modern touchscreen market. By doping ZnO with Ga conductive transparent thin films with various concentrations of dopant are prepared by DC magnetron sputtering from ceramic targets. It is shown how the Ga content plays an important role on the growth kinetics on an initial stage of the film formation and hence on the morphologies, micro-structure and electrical properties of as-grown GZO films. A mechanism explaining the role of Ga content on the nucleation process and the structure of growing films is proposed. Based on this mechanism, it is successfully demonstrated that the crystalline quality and hence the conductivity of GZO thin films can be improved by using a GZO buffer layer.