Paweł Jarka

Silesian University of Technology

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Tomasz Tański

Silesian University of Technology

Barbara Hajduk

Centre of Polymer and Carbon Materials

Henryk Bednarski

Polish Academy of Sciences

Wiktor Matysiak

Silesian University of Technology

J. Weszka

Silesian University of Technology

Henryk Janeczek

Centre of Polymer and Carbon Materials

J. Jurusik

Centre of Polymer and Carbon Materials

Pallavi Kumari

Tilka Manjhi Bhagalpur University

M. Szindler

Silesian University of Technology

Monika Chwastek

Institute of Organic Chemistry

Cooperative Institutions

Silesian University of Technology

Polish Academy of Sciences

Centre of Polymer and Carbon Materials

Centre National de la Recherche Scientifique

University of Silesia in Katowice

Institute of Metallurgy and Materials Science

Institute of Physics

Universidad Complutense de Madrid

Selçuk University

Institute of Chemical Technology

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Phase Diagrams of n-Type Low Bandgap Naphthalenediimide-Bithiophene Copolymer Solutions and Blends

Polymers (2019)

Gada Muleta Fanta Paweł Jarka Urszula Szeluga Tomasz Tański Jung Yong Kim

Phase diagrams of n-type low bandgap poly{(N,N'-bis(2-octyldodecyl)naphthalene -1,4,5,8-bis(dicarboximide)-2,6-diyl)-alt-5,5',-(2,2'-bithiophene)} (P(NDI2OD-T2)) solutions and blends were constructed. To this end, we employed the Flory-Huggins (FH) lattice theory for qualitatively understanding the phase behavior of P(NDI2OD-T2) solutions as a function of solvent, chlorobenzene, chloroform, and p-xylene. Herein, the polymer-solvent interaction parameter (χ) was obtained from a water contact angle measurement, leading to the solubility parameter. The phase behavior of these P(NDI2OD-T2) solutions showed both liquid-liquid (L-L) and liquid-solid (L-S) phase transitions. However, depending on the solvent, the relative position of the liquid-liquid phase equilibria (LLE) and solid-liquid phase equilibria (SLE) (i.e., two-phase co-existence curves) could be changed drastically, i.e., LLE > SLE, LLE ≈ SLE, and SLE > LLE. Finally, we studied the phase behavior of the polymer-polymer mixture composed of P(NDI2OD-T2) and regioregular poly(3-hexylthiophene-2,5-dyil) (r-reg P3HT), in which the melting transition curve was compared with the theory of melting point depression combined with the FH model. The FH theory describes excellently the melting temperature of the r-reg P3HT/P(NDI2OD-T2) mixture when the entropic contribution to the polymer-polymer interaction parameter (χ = 116.8 K/T -0.185, dimensionless) was properly accounted for, indicating an increase of entropy by forming a new contact between two different polymer segments. Understanding the phase behavior of the polymer solutions and blends affecting morphologies plays an integral role towards developing polymer optoelectronic devices.

Flory–Huggins solution theory

Melting-point depression

Hildebrand solubility parameter

Dimensionless quantity

Tetragonal crystal system

10.3390/polym11091474

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Citations (8)

IR and microscopic studies of polyurethane surface in the Polish extracorporeal ventricular assist device POLVAD-MEV

Archives of Materials Science and Engineering (2014)

M. Kościelniak-Ziemniak Barbara Hajduk Paweł Jarka J. Weszka R. Kustosz

Extracorporeal

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Citations (2)

List of Contributors

Elsevier eBooks (2018)

Hafedh Abdelmelek Hamideh Aghahosseini Suhail Ahmad Shakeel Ahmed Tuğbahan Yılmaz

10.1016/b978-0-12-813351-4.00068-7

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Study of Photovoltaic Devices Hybrid Active Layer

2018-Sustainable Industrial Processing Summit (2018)

Paweł Jarka Tomasz Tański Wiktor Matysiak Barbara Hajduk

The aim of this work is present of the influences of composition of the material and manufacturing technology conditions of the photovoltaics devices (OPv) with the organic and hybrid bulk heterojunctin on the active layers properties and cells performance. The layers were produced by use small molecular compounds: the metal-phthalocyanine (MePc) and perylene derivatives (PTCDA) and the titanium dioxide (TiO2) nanoparticles. Two kinds of metal phthalocyanines (NiPc, TiOPc) were used as donor material and as a acceptor was used pperylenetetracarboxylic dianhydride (PTCDA). The used manufacturing technique allows to using thin layers of materials in a fast deposition process. Bulk heterojunction was create by simultaneous applying the MePc:PTCDA materials during the temperature evaporation of the mixture of components. The research was based on the estimate of composition of bulk heterojunction, the examination of the surface morphology of the used layers and optical properties studies of the heterojunction and its implementation to photovoltaic architecture. The produced photovoltaic cells parameters were determined on the basis of current - voltage characteristics. The researches of structure of obtained layers were conducted by usingscannind electron microscope (SEM) transmittion electron microscopy (TEM). The quantitative determination of surface topography by determining RMS and Ra coefficients were perform by atomic force microscopy (AFM). In order to determining the optical properties of films the UV-Visible spectroscope have been utilize. Current - voltage characteristics were to determine the basic photovoltaic parameters using a dedicated device. The paper describes the influence of the individual components share of the bulk heterojunction on its structure, optical properties and morphology of surface. In addition allows for linking of active layers properties with the parameters of the photovoltaic cells. The obtain results suggest the possibility of developing the utilizing materials and technology in the further works on photovoltaic structures.

Active layer

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Thermal and optical properties of PMMA films reinforced with Nb2O5 nanoparticles

Scientific Reports (2021)

Barbara Hajduk Henryk Bednarski Paweł Jarka Henryk Janeczek Marcin Godzierz

Abstract The article presents the thermal and physical properties of PMMA composite films with the addition of Nb 2 O 5 nanoparticles. The addition of nanoparticles to PMMA mainly influenced the optical transmission and glass transition temperature of composite films compared to pure PMMA. It is clearly visible in the results of the conducted ellipsometric and differential scanning calorimetry tests. X-ray studies showed that the heat treatment of the samples resulted in the ordering of the polymer structure (flattening of the polymer chains). Examining the surface of the samples with scanning electron microscopy, it can be seen that Nb 2 O 5 nanoparticles formed unusual, branched formations resembling "snowflakes".

10.1038/s41598-021-01282-7

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Citations (29)

Electrospinning Method Used to Create Functional Nanocomposites Films

InTech eBooks (2018)

Tomasz Tański Paweł Jarka Wiktor Matysiak

The most effective method of producing nanofibres is the technology of producing in the electrostatic field, which does not require the use of complicated procedures and equipment. Electrospinning allows to produce 1D nanostructures on an industrial scale in a relatively easy and quick way. The method of electrospinning shares the most features with classical technologies in obtaining synthetic fibres that enable forming and generating a stream of previously dissolved or melted polymer and its coaxial stretching, combined with the transition of the polymer from a liquid state to a solid state. In view of the large application possibilities of electrospun fibres, electrospinning is enjoying a dynamically growing interest of scientists, which can be proven by the increasing trend of scientific publications.

Electrospinning

10.5772/intechopen.70984

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Comparison of optical properties of PAN/TiO2, PAN/Bi2O3, and PAN/SbSI nanofibers

Optical Materials (2018)

Wiktor Matysiak Tomasz Tański Paweł Jarka M. Nowak Mirosława Kępińska

Electrospinning

Morphology

10.1016/j.optmat.2018.05.055

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Citations (24)

CLSM and UV-VIS researches on polyoxadiazoles thin films

Archives of Materials Science and Engineering (2012)

J. Weszka M. Szindler M. Chwastek-Ogierman M. Brumă Paweł Jarka

Purpose: The purpose of this paper was to analyse the surface morphology and optical properties of polyoxadiazoles thin films. Design/methodology/approach: A few different conducting polymers were dissolved in N-methyl2-pyrrolid(in)one. Then the solutions were deposited on a glass substrate by spin coating method with a different spin rate. Changes in surface topography and optical properties were observed. A confocal laser scanning microscope CLSM Zeiss LSM 5 Exciter has been used. Photos have been taken from area of 120 x 120 microns. Findings: The analysis of images and spectra has confirmed that the quality of thin films depends upon the used polymers. It was also observed that the parameters of the spin coating method have significant effect on the morphology and the optical properties. The spin rate has got a strong impact on them. Research limitations/implications: The morphology and optical properties of polyoxadiazoles thin films has been described. This paper include description how the spin rate influence on the polymer thin films. In order to use a polymer thin film in photovoltaics or optoelectronics it must have a high internal transmission density. Further research of polymer thin films are recommended. Practical implications: The spin coating method allows to deposit a uniform thin films. It is important to know how the spin rate influence on the thin films properties. It is also important to find a new use for this group of material engineering in photovoltaic or optoelectronics devices. Originality/value: The good properties of thin films make them suitable for various applications. The value of this paper is defining the optimal parameters of spin-coating technology for polyoxadiazoles thin films. The results allow the choosing optimal parameters of the deposition process. Spin coating is a very good method to obtain thin films which are obligated to have the same thickness over the whole surface.

Spin Coating

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Tailoring electronic structure of polyazomethines thin films

Journal of Achievements of Materials and Manufacturing Engineering (2010)

J. Weszka Barbara Hajduk Mateusz A. Domański Monika Chwastek J. Jurusik

Purpose: The aim of this work is to show how electronic properties of polyazomethine thin films deposited by chemical vapor deposition method (CVD) can be tailored by manipulating technological parameters of pristine films preparation as well as modifying them while the as-prepared films put into iodine atmosphere. Design/methodology/approach: The recent achievements in the field of designing and preparation methods to be used while preparing polymer photovoltaic solar cells or optoelectronic devices. Findings: The method used allow for pure pristine polymer thin films to be prtepared without any unintentional doping taking place during prepoaration methods. This is a method based on polycondensation process, where polymer chain developing is running directly due to chemical reaction between molecules of bifunctional monomers. The method applied to prepare thin films of polyazomethines takes advantage of monomer transporting by mreans of neutral transport agent as pure argon is. Research limitations/implications: The main disadvantage of alternately conjugated polymers seems to be quite low mobility of charge carrier that is expected to be a consequence of their backbone being built up of sp2 hybridized carbon and nitrogen atoms. Varying technological conditions towards increasing reagents mass transport to the substrate is expected to give such polyazomethine thin films organization that phenylene rin stacking can result in special π electron systems rather than linear ones as it is the case. Originality/value: Our results supply with original possibilities which can be useful in ooking for good polymer materials for optoelectronic and photovoltaic applications. These results have been gained on polyazomethine thin films but their being isoelectronic counterpart to widely used poly p-phenylene vinylene may be very convenient to develop high efficiency polymer solar cells

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Surface morphology of thin films polyoxadiazoles

Journal of Achievements of Materials and Manufacturing Engineering (2011)

J. Weszka M. Szindler M. Chwastek-Ogierman M. Brumă Paweł Jarka

J. Weszka a,b, M.M. Szindler a,*, M. Chwastek-Ogierman b, M. Bruma c, P. Jarka a, B. Tomiczek a a Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland b Department of Physics, Center of Polymer and Carbon Materials, Polish Academy of Sciences, ul. M. Curie-Sklodowska 34, 41-819 Zabrze, Poland c Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, Iasi, Romania * Corresponding author: E-mail address: magdalena.szindler@polsl.pl Received 15.11.2011; published in revised form 01.12.2011

Morphology

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Citations (13)