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Tuning Transparent Supercapacitor Performance by Controlling the Morphology of its ZnO Electrodes

100%
Borysiewicz M., Wzorek M., Ekielski M., Kaczmarski J., Wojciechowski T.
Acta Physica Polonica A
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2017
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vol. 131
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issue 6
1550-1553
EN
Transparent supercapacitors were fabricated using nanostructures ZnO electrodes deposited using reactive magnetron sputtering. By fine tuning the deposition process parameters the electrodes with different morphologies were obtained, from hierarchical through sponge-like to nanocolumnar. The device performance related to the electrode morphology was assessed. It was found that the nanocolumnar electrodes provided best performance both in terms of effective device capacitance (18.3 μF/cm²) and transparency ( ≈ 100% in the visible range). The worst performance, with 80% lower effective capacitance, was obtained in the devices with the sponge-like morphology.
2
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Fabrication and Properties of Amorphous In-Ga-Zn-O Material and Transistors

86%
Kaczmarski J., Taube A., Dynowska E., Dyczewski J., Ekielski M., Kamińska E., Piotrowska A.
Acta Physica Polonica A
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2013
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vol. 124
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issue 5
855-857
EN
In-Ga-Zn-O thin films were fabricated by means of reactive RF magnetron sputtering. Mechanism of free electrons generation via oxygen vacancies formation is proposed to determine the relationship between oxygen content in the deposition atmosphere and the transport properties of IGZO thin films. The depletion-mode a-IGZO thin film transistor with field-effect mobility of 12 cm^2/(Vs) has been demonstrated.
3
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Zinc Oxide Semiconductor for Photonics Structures Applications

73%
Struk P., Pustelny T., Pustelny B., Gołaszewska K., Kamińska E., Piotrowska A., Borysiewicz M., Ekielski M.
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issue 6
1242-1245
EN
The paper presents investigations concerning the analysis of photonic structures with grating couplers. In the paper basic theoretically information on photonic structures with grating couplers is presented. The results of numerical investigations on photonic structures with grating couplers are discussed, too. Investigations show an essential influence of the geometrical parameters of grating couplers on the effectiveness of the input and output of optic power into and out of this photonic structure. In the paper the selected results of experimental realizations of photonic structures with grating couplers based on zinc oxide ZnO are presented.
4
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Planar Optical Waveguides Based on Thin ZnO Layers

73%
Struk P., Pustelny T., Gut K., Gołaszewska K., Kamińska E., Ekielski M., Pasternak I., Łusakowska E., Piotrowska A.
Acta Physica Polonica A
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2009
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vol. 116
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issue 3
414-418
EN
The paper quotes the results of investigations concerning planar optical waveguides with a high value of the refractive index, achieved basing on a broad-band gap semiconductor ZnO, deposited on glass or quartz substrates. The investigations were focused on the properties of the waveguides, determining the modal characteristics, the attenuation coefficient and the structure of the surface.
5
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Planar Optical Waveguides for Application in Optoelectronic Gas Sensors

59%
Golaszewska K., Kamińska E., Pustelny T., Struk P., Piotrowski T., Piotrowska A., Ekielski M., Kruszka R., Wzorek M., Borysiewicz M., Pasternak I., Gut K.
Acta Physica Polonica A
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2008
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vol. 114
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issue 6A
A-223-A-230
EN
In the paper, the results of technological investigations on planar optical waveguides based on high band gap oxide semiconductors were presented. Investigations concerned the technologies of depositing very thin layers of: zinc oxide ZnO, titanium dioxide TiO_2 and tin dioxide SnO_2 on substrates of quartz glass plates. There were investigated both morphological structures of the produced layers and their optical properties. The paper also presents investigations on the technology of input-output light systems in the Bragg grating structures.
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