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1
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Materials Science Poland
2004 Vol. 22, No. 4 571--577
EN Spectral and electric properties of six new materials for electroluminescent devices are described, including materials for emitting layers based on triazole derivatives and zinc chelate complexes, and a high-Tg hole -transporting material based on triphenylamine.
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Materials Science Poland
EN For the first time, a novel fluorescent material, composed of CeO2/ANS nanocomposites was successfully synthesized by a simple ultrasonic method, using CeO2 nanoparticles and 8-anilino-1-naphthalenesulfonic acid (ANS) as the raw materials. The samples were characterized by scanning electron microsco[...]
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Materials Science Poland
2012 Vol. 30, No. 2 105--120
EN Four different hybrid organic-inorganic materials based on TiO2-SiO2 matrices with organic additives and doped with rare-earth metal ions (III) from the group of europium, cerium, terbium, neodymium, dysprosium and samarium, were synthesized by sol-gel method. Tetraethyl orthosilicate, titanium (IV)[...]
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Opto - Electronics Review
EN The photoluminescence (PL) of solar cells, based on Cu(In,Ga)Se₂ and bare Cu(In,Ga)Se₂ absorbers, has been studied. Shapes and intensity dependencies of the PL spectra in the junctions and in thin films are compared and discussed in terms of influence of the junction field. Measurements of the otolu[...]
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Materials Science Poland
EN In this paper, 3-(triethoxysilyl)-propyl isocyanate (abbreviated as TESPIC) was modified by ethylparaben (EPB) to produce corresponding organic-inorganic monomers (EPB-TESPIC) with two components equipped with covalent bonds, which not only can coordinate to RE ions (Tb3+ and Eu3+) but also act as a[...]
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Opto - Electronics Review
EN Photoluminescence (PL) of HgCdTe-based hetero-epitaxial nanostructures with 50 to 1100 nm-wide potential wells was studied. The nanostructures were grown by molecular beam epitaxy on GaAs substrates. A strong degree of alloy disorder was found in the material, which led to the broadening of the PL s[...]
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Opto - Electronics Review
EN In the present paper, ZnO nanoparticles (NPs) with particle size of 20-50 nm have been synthesized by hydrothermal method. UV-visible absorption spectra of ZnO nanoparticles show absorption edge at 372 nm, which is blue-shifted as compared to bulk ZnO. Photoluminescence (PL) and photoconductive devi[...]
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Opto - Electronics Review
EN Photoluminescence (PL) of the absorber layer of ZnO/CdS/Cu(In,Ga)Se2 solar cells has been studied. Baseline process solar cells as well as structures subject to a damp heat treatment and sodium - free structures have been investigated. The excitation intensity and temperature dependence of the phot[...]
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Optica Applicata
EN In the present paper, we discuss the influence of point defects on electrical and optical characteristics of ZnO thin films grown by the atomic layer deposition (ALD) method. The films were grown on glass substrates at low temperature (100-200 °C). We used diethylzinc (DEZn) and deionized water as p[...]
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Optica Applicata
EN A series of luminescent materials consisting of Tb2-xEux (WO4)3 entrapped in silica xerogel were successfully prepared. The parameter x in the formula changed from 0.4 to 2. Spectroscopic properties such as absorption and luminescence of optically active ions were studied at room temperature. Owing [...]
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Optica Applicata
EN CdS nanoclusters were formed in the porous glass matrix by sequential chemical deposition from liquid-vapor phase and their chemical content was investigated. The room temperature photoluminescence spectra of specimens excited with a 235 nm wavelength had typical narrow peaks at 400 nm. The peaks ca[...]
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Optica Applicata
EN Photoluminescence spectroscopy in combination with Monte Carlo simulation of exciton hopping is demonstrated to be a valuable tool for quantitative analysis of the band potential profile in active layers for InGaN-based light emitters. Recently proposed double-scaled potential profile model is used [...]
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Nukleonika
EN In the present work, photoluminescence and Doppler broadening depth-resolved positron annihilation spectroscopy was performed on pure zirconia nanopowders. Zirconia nanopowders were grown by a hydrothermal microwave-driven process followed by annealing in oxygen atmosphere. Photoluminescence under 2[...]
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Opto - Electronics Review
EN We report the results from detailed optical spectroscopy from MOCVD grown GaN/AlGaN multiple quantum wells (MQWs), as opposed to most previous studies where MBE was employed by means of photoluminescence (PL) technique. In this paper we will present theoretical and experimental results demonstrating[...]
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Materials Science Poland
EN Bi4Ge3O12 single crystals were obtained using Czochralski growth method. Photoluminescence spectra were analyzed versus temperature from 12 to 295 K. Besides the previously observed emission bands at 610 and 820 nm, the new emission band at 475 nm was found by a careful temperature dependence measur[...]
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Materials Science Poland
2014 Vol. 32, No. 2 157—163
EN In this study, an external electric field was used to facilitate the growth of vertically aligned ZnO crystal rods on the surface of indium tin oxide (ITO) glass substrates in an aqueous solution. We used Zn(NO3) and C6H12N4 as precursor and reagent. We found that the external electric field generat[...]
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Opto - Electronics Review
EN Technological parameters of crystal growth using Bridgman-Stockbarger method for some materials of Cu-In-Se and Cu-In-Ga-Se systems are presented. Single crystals as large as 1 cm³ have been grown. The composition variation along crystal ingots was determined by the microprobe analysis. A strong seg[...]
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Opto - Electronics Review
EN Results of the scanning electron microscopy (SEM), X-ray diffraction (XRD), optical absorption, photoconductivity (PC), and photoluminescence (PL) studies for the CdSSe:CdCl₂,Ho films are presented in this paper. The SEM studies of different CdSSe films show a layered growth structure. A crystalline[...]
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Materials Science Poland
2016 Vol. 34, No. 3 529--533
EN PbMoO4 and PbWO4 were successfully synthesized by microwave radiation using different lead salts (acetate, chloride, nitrate and sulfate) and Na2MO4 (M = Mo, W) in propylene glycol. The products were characterized by X-ray diffraction (XRD), scanning and t[...]
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Optica Applicata
2016 Vol. 46, nr 2 255--263
EN In this work, the authors present the results of optical characterization of GaAs-based multiple quantum well heterostructures, together with energy band structure analysis. The optical properties were investigated by applying photoluminescence spectroscopy. Structures with GaInNAs, GaInAs and GaNAs[...]
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