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1
Content available Optical and Structural Properties of Cu2O thin Film as Active Layer in Solar Cells Prepared by DC Reactive Magnetron Sputtering
Sawicka-Chudy P., Wisz G., Sibiński M., Cholewa M., Potera P., Głowa Ł., Pawełek R.
Archives of Metallurgy and Materials
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2019
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Vol. 64, iss. 1
243--250
EN
A series of copper oxide thin films were synthesized through direct current magnetron sputtering on glass and silicon substrates with various process parameters. Initially, optical microscopy images and their histograms were analyzed to determine the optical quality of the obtained layers and then histograms were created using Image Histogram Generator software. Next, the morphology, and cross-section and layer composition of the samples were evaluated. Finally, the transmission spectra of the thin films were recorded. Transmittance and reflection spectra of the UV–vis analysis were utilized to calculate the optical band gap, the extinction coefficient, and the absorption coefficient of the oxidized layers. Samples showed low transmittance (up to 40%) in the region of 400 to 1000 nm. The mean absorption coefficient varied from ~3 · 105 to ~6 · 105 1/cm and from ~2 · 105 to ~4 · 105 1/cm in the region of 2 eV to 3.5 eV. The extinction coefficient ranged from 0 to 0.11 in the region from 300 to 3000 nm. Reflectance of the samples was ~20% in the region of 1000 to 2500 nm and ranged from 20%-50% in the region of 1000 to 3000 nm. We verified the process parameters of the Cu2O structure to improve the quality as a buffer layer. On the basis of this preliminary analysis, we propose the most promising and future-oriented solutions in photovoltaic applications.
2
Content available remote Optical properties of AlN layers obtained by magnetron sputtering
Potera P., Wisz G., Szyller Ł.
Materials Science Poland
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2018
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Vol. 36, No. 4
717--721
EN
The growth of AlN layers on glass substrates using magnetron sputtering method was performed and the grown layers were subjected to optical measurements. Transmission spectra of the layers grown at different content of N2 in the atmosphere were obtained. The transmission spectra as well as energy gap depended on N2 content. The annealing of the layers in air led to transmission changes and influenced energy gap and refractive index values.
3
Content available remote Optical properties of ZnCoO layers obtained by PLD method
Potera P., Virt I., Wisz G., Cebulski J.
Materials Science Poland
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2017
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Vol. 35, No. 4
878--884
EN
Optical properties of the zinc-cobalt oxide (ZnCoO) layers manufactured at different process conditions have been investigated. ZnCoO layers were grown on sapphire and glass substrates by pulsed laser deposition (PLD) technique. The influence of growth conditions as well as post-growth annealing on the films transmission and gap energy was analyzed.
4
Content available Electron paramagnetic resonance studies of manganese and cobalt ions in YAlO3 crystals
Stefaniuk I., Rogalska I, Suchocki A, Berkowski M., Cieniek B., Potera P.
Optica Applicata
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2014
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Vol. 44, nr 1
113--121
EN
The results of X-band electron paramagnetic resonance measurements of Mn2+ and Mn4+ ions in YAlO3 (YAP) crystals in the temperature range 100–300 K are presented. Additionally, we observe electron paramagnetic resonance spectra of unintentional impurities Fe3+ and Cr3+ in YAP crystals. The angular dependence for Mn ions in YAP crystals can be presented. We aim at obtaining a better insight into the spectroscopic properties of paramagnetic Mn centers and structural information about their nearest environment in YAP host and at determining the valence of manganese ion. In this paper we compare electron paramagnetic resonance spectra for Co and Mn ions in YAP crystals.
5
Content available EPR measurements of ceramic cores used in the aircraft industry
Stefaniuk I., Rogalska I.., Potera P., Wróbel D.
Nukleonika
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2013
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Vol. 58, No. 3
391--395
EN
In this work the electron paramagnetic resonance (EPR) spectra of Al2O3 and ZrO2 powders were measured for different size of grains (0.074, 0.044 mm) as well as the mullites (0.07 and 0.12 mm). Also were investigated the ceramic cores. The measurements were performed at room temperature and in the temperature range from 140 up to 380 K. The main purpose of this work was to investigate the possible relationships between the EPR spectra and the size of powder grains as well as the identification of EPR spectra in view of the potential application of EPR technique as a fingerprinting method.
6
Content available Wpływ promieniowania jonizującego na własności optyczne wybranych kryształów typu ABO3
Potera P., Łukasiewicz T., Świrkowicz M.
Materiały Elektroniczne
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2009
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T. 37, nr 1
5-58
PL
Praca stanowi syntetyczne ujęcie zagadnień związanych z kompleksowymi badaniami wpływu promieniowania (kwanty gamma, UV, elektrony, szybkie neutrony) na własności optyczne niedomieszkowanych i domieszkowanych wieloskładnikowych kryształów tlenkowych typu ABO3, otrzymanych w ITME: perowskitu itrowo-glinowego i niobianu litu. Zmiany własności optycznych tych kryształów wkutek napromieniowania są wynikiem powstawania centrów barwnych, zarówno poprzez zmianę stanu ładunkowego defektów wzrostowych jak i tworzenia się defektów radiacyjnych w wyniku przemieszczenia atomów.
EN
Comprehensive results of researches about influence of gamma quanta, UV, electrons and fast neutrons radiation on optical properties of undoped and doped multicomponents oxide single crystals ABO3 type: yttrim alumina perovskit (YAP) and lithium nobate (LN). Changes of optical properties as effect of radiation are result of colour centre creation by means of electric charge in genetic defects changes or creation of radiation defects with displacement.
7
Content available remote Concentration of Radiation Displacement Defects in Complex Oxide Crystals upon Energy of Particle
Potera P.
Computational Methods in Science and Technology
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2007
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Vol. 13, nr 1
47-51
EN
The present work is devoted to the calculation of the radiation displacement defects (RDD) concentration in complex oxide crystals (Y3Al5O12, Gd3Ga5O12, YAlO3, LiNbO3) as a function of particle energy (electrons and neutrons). Energy dependencies of RDD concentration are discussed. The results of calculations show that the concentrations of RDD reduced to one impinging particle increased initially with the particles energy and they saturates for the electron and neutron energy above 25 MeV. The comparison of the concentrations of RDD calculated for different sub-lattices as well as for the cases of electrons and neutrons is made. The obtained results are compared with the experimental data.
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