Gabriela Lewińska

• PhD
• assistant professor at AGH University of Krakow

This article presents a study of copper oxide (CuO) used as a booster layer in binary and ternary organic solar cells, with the aim to determine its effect on performance and efficiency of the cells. CuO layers were deposited by DC reactive magnetron sputtering, resulting in a film thickness of 23 nm. The cells were fabricated, and tested, and thei...

Organic solar cells are a rapidly expanding subfield of photovoltaics. The publication presents simulation results for organic cells with a focus on optimizing cells and maximizing performance using OghmaNano software. The efficiencies obtained from the simulation of the ternary solar devices were received. The efficiency achieved from simulations...

Organic solar cells are a promising candidate for practical use because of their low material cost and simple production procedures. The challenge is selecting materials with the right properties and how they interrelate in the context of manufacturing the device. This paper presents studies on CdSe/ZnS nanodots as dopants in a polymer-fullerene ma...

This publication focuses on the fabrication and thermo-optical examination of donor–acceptor layers doped with small molecules for ternary photovoltaic cell applications. The main focus of this research is the investigation of a two-component system, consisting of regioregular poly (3-hexylthiophene-2,5-diyl) as the donor material, combined with tw...

Gwałtowny rozwój fotowoltaiki i innych odnawialnych źródeł energii spowodował wzrost popytu na prace badawcze i rozwojowe w tych obszarach oraz zapotrzebowania na kadry inżynierskie o takim profilu. Szereg uczelni, w tym Akademia Górniczo- -Hutnicza, uruchomiło nowe kierunki studiów lub nowe specjalizacje związane z obszarem odnawialnych źródeł. Pr...

The paper presents studies of polymer-fullerene matrix-dopped CdSe/ZnS nanodots for application in organic solar cells. As a reference active layer, poly(3-hexylthiophene-2 5-diyl) and 6,6-phenyl-C71-butyric acid methyl ester arrangement was used. Absorption and luminescence spectra were determined for CdSe/ZnS quantum dots. The dispersion relation...

The publication presents the effect of different types of the third component on the morphologies and layer arrangement in three-component mixtures. The three-component layers are being studied for implementation as an active layer for a three-component organic cell. Thin films were studied using optical methods. The gradient model for the individu...

The main problem of organic light-emitting diodes (OLEDs) is their degradation caused by the interaction of the polymer with atmospheric factors. The development of new encapsulation methods and materials for OLEDs can solve this problem. In this work prompted us to investigate the possibility of using hydrogenated amorphous carbon nitrogen-modifie...

https://pre-epodreczniki.open.agh.edu.pl/openagh-podreczniki_view.php?categId=143&handbookId=129

The publication presents the results of investigations of the influence of dye dopant on the electrooptical and morphology properties of a polymeric donor:acceptor mixture. Ternary thin films (polymer:dye:fullerene) were investigated for potential application as an active layer in organic solar cells. The aim of the research is to determine the eff...

19 The publication presents the results of investigations of influence of dye dopant on electrooptical 20 and morphology properties of polymeric donor : acceptor mixture. Ternary thin films (poly-21 mer:dye:fullerene) were investigated for potential application as an active layer in organic solar 22 cells. The aim of the research is to determine th...

The thin layers of ZnO and ZnO: Al (Al doped zinc oxide—AZO) were deposited by the atomic deposition layer (ALD) method on silicon and glass substrates. The structures were deposited using diethylzinc (DEZ) and deionized water as zinc and oxygen precursors. A precursor of trimethylaluminum (TMA) was used to introduce the aluminum dopant. The presen...

Among many chemical compounds synthesized for third-generation photovoltaic applications, quinoline derivatives have recently gained popularity. This work reviews the latest developments in the quinoline derivatives (metal complexes) for applications in the photovoltaic cells. Their properties for photovoltaic applications are detailed: absorption...

The publication contains polymorphic and micromorphic photovoltaic module outdoor tests performed during autumn, winter, spring and summer day. Simulations of an installation consisting of panels both types have been made. Both performances were compared for the location in the KrakówCzęstochowa Upland, continental climate.

Abstract: The rapid development of organic light-emitting diode technology begin after 2000 and still is in progress. Now, organic light-emitting diodes are a major technology in the manufacture of flat panel displays and for lighting. Screens based on OLED technology are characterized by unique properties such as energy savings, wide viewing angle...

In this study, the photo-optical properties of the series of new 1H-pyrazolo[3,4-16 b]quinoline derivatives were investigated. Pyrazoloquinoline studies were conducted to explain the 17 electroluminescent effect in organic LEDs. Absorption and photoluminescence spectra for the 18 materials under consideration were examined, and quantum chemical cal...

Heterojunction solar cells based on ternary blends of two donors (absorbers and one acceptor) were investigated using modeling. The Tauc-Lorentz model and experimental absorption spectra of selected compounds were used in the simulations. The optimization process was carried out in this way to maximize the absorption of the system. Poly(3-hexylthio...

Pyrazolo[3,4-b]quinolines are fascinating compounds of great importance. They reveal not only a range of very interesting biological activities, but also have been applied as optical brighteners, in organic light emitting diodes (OLED), in polymer light emitting diodes (PLED), sensors, in nonlinear optics, solar cells and many others. Recently, two...

This paper discusses the results for heterojunction solar cells based on three components (with fullerene acceptor), which are based on the pyrazoloquinoline derivative. Photovoltaic devices based on ternary systems are presented along with a model optimization for such mixtures. The device bulk-heterojunction type cells represent architecture ITO/...

The Front Cover shows a thin film of Prussian blue analogue Ni3.1[Cr(CN)6]2·12H2O and the temperature dependence of the change in magnetic entropy obtained for this material for different values of external magnetic fields. More information can be found in the Full Paper by M. Fitta et al. For more on the story behind the cover research, see the Co...

Invited for the cover of this issue is research led by Magdalena Fitta at the Institute of Nuclear Physics, Kraków, Poland, in collaboration with scientists at the Jagiellonian University, Institute of Metallurgy and Materials Science, and Kraków University of Technology. The cover image shows the temperature dependence of the change in magnetic en...

The molecule- based bilayer system composed of hard Ni3.38[Fe(CN)6]2⋅nH2O and soft Ni3.1[Cr(CN)6]2⋅nH2O ferromagnetic Prussian blue analogues has been fabricated on a solid substrate by “layer by layer” deposition. The structure and morphology characterization as well as results of magnetic measurements are described. The thickness of the bilayer i...

Investigation of a magnetocaloric effect in the thin film of nickel hexacyanochromate obtained by "layer by layer" deposition is reported. This compound shows a sharp phase transition to a long range ferromagnetically ordered state with Tc= 66 K. In order to check the shape anisotropy effect, the properties of the thin film were investigated for th...

Light sources and their influence on vision organ Źródła światła i ich wpływ na narząd wzroku Abstract The aim of the study was to compare light sources. The paper presents the spectrum of light intensity for natural and artificial sources. Analysis of the spectra was carried out because of their importance for the health of the eye.

Amorphous a-SiCxNy:H thin films may be an alternative to a-Si:N:H coatings which are commonly used in silicon solar cells. This material was obtained by Plasma Enhanced Chemical Vapor Deposition – PECVD (13.56 MHz) method. The reaction gases used: silane, methane, nitrogen and ammonia. The structure of the layers were investigated by scanning elect...

This article presents results of a study of photovoltaic devices based on organic compounds, called SP69, SP70, SP71-helical structures containing 7-membered fused rings. During tests heterojunction solar cells were built with ITO/PEDOT:PSS/organic active layer/aluminum architecture, in which an active layer was two- or three-component organic comp...

Związki organiczne, od lat wykorzystywane do budowy ogniw fotowoltaicznych i diod elektroluminescencyjnych, cieszą się niesłabnącym zainteresowaniem. Prezentujemy nowe związki o helikalnej strukturze 2-metoksy-m,n-dimetylo-6-fenylo-6H-5,6,7- triazadibenzo[f,h] nafto[3,2,1-cd]azulenu (m,n: 8,9; 8,10; 9,10), będące podstawą układów fotowoltaicznych....

Ciekłe kryształy są substancjami o szczególnych właściwościach (między innymi optycznych) i szerokich zastosowaniach. Substancje ciekłokrystaliczne, które badaliśmy, wykazują unikalne sekwencje przejść fazowych. Głównym zadaniem było wyznaczenie parametrów optycznych cienkich warstw dwóch ciekłych kryształów 5CB -cyjano-4’- pentylbifenylu oraz (4-(...

Blue phase liquid crystals exhibit unique properties which are used in the new type of display. A blue-phase liquid crystal display was first presented commercially by Samsung in 2007. The blue-phase-three-color pixel display eliminates the need for color filters. This type of display uses blue-phase multi-component liquid crystal. Considering the...

New symmetrical arylene bisimide derivatives formed by using electron-donating-electron-accepting systems were synthesized. They consist of a phthalic diimide or naphthalenediimide core and imine linkages and are end-capped with thiophene, bithiophene, and (ethylenedioxy)thiophene units. Moreover, polymers were obtained from a new diamine, N,N'-bis...

Ellipsometry optical measurements are a very useful tool for obtaining information about details of layered structures in the nanoscale. By examining data obtained with silicon wafers in the room conditions we show how to obtain a reliable assessment of the thickness of the adhered water nanolayer. This effect is naturally caused by the hydrophilic...

(4-(40octylobiphenyl)carboxylan) 4-(2-methylobuthyl) phenol (CE8), the substance showing complex polymorphism, has been investigated using the dielectric spectroscopy method. This substance exhibited polymorphism during heating and cooling: a few smectic phases, a cholesteric phase, and a blue phase as well. Despite the fact that the substance poly...

4-(4 -octylobiphenyl)carboxylane) 4-(2-methylobuthyl) phenol, the substance showing complex polymor-phism, has been investigated using the calorimetric, microscopic and X-ray methods. This substance exhibited polymorphism during heating and cooling: a few smectic phases, a cholesteric phase and a blue phase as well. However, the substance polymorph...