Temat: laser patterning - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Improved Photovoltaic Properties Of Dye-Sensitized Solar Cells Using Laser Patterned F-Doped SnO2 Thin Films
Poprawa właściwości fotowoltaicznych ogniw słonecznych uczulonych barwnikiem przez laserową modyfikację powierzchni cienkich warstw SnO2
Autorzy:: An, H.-R.
An, H.
Riu, D.-H.
Ahn, H. J.
Tematy:: dye-sensitized solar cells
F-doped SnO2 thin films
surface morphology
laser patterning
fotowoltaniczne ogniwa słoneczne
cienkie warstwy SnO2
morfologia powierzchni
modyfikacja laserowa; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/353636.pdf Link otwiera się w nowym oknie
Opis:: We modified the surfaces of F-doped SnO₂ thin films using laser patterning to improve the photovoltaic properties of dye-sensitized solar cells. To do so, we varied the laser power density and the distance between laser-patterned lines. First, we investigated three power densities. Higher densities led to higher sheet resistances owing to increases in surface roughnesses. The lowest power density increased surface roughness without electrical degradation. Next, we explored three line spacings at a fixed power density. The films with the narrowest spacing exhibited the highest power conversion efficiency (~7.00%), the highest short-circuit photocurrent density (16.28 mA/cm²), and a good fill factor (58.82%).
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Optical Diffraction Strain Sensor Prepared by Interference Lithography
Autorzy:: Zabila, Y.
Horeglad, P.
Krupiński, M.
Zarzycki, A.
Perzanowski, M.
Maximenko, A.
Marszałek, M.
Tematy:: Strain
direct laser interference patterning
optical strain sensor
diffraction grating
Poisson ratio
Kapton
flexible
optical strain gauge; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1030666.pdf Link otwiera się w nowym oknie
Opis:: An optical strain sensor was developed for use in stretchable electronics. It consists of a diffraction grating formed directly on the examined surface illuminated by a laser beam which creates interference pattern. This pattern can then be used to determine axial and lateral strains for a uniaxial stress states. Direct laser interference patterning was employed as a fast processing tool for the preparation of micro- and sub-microgratings. Two coherent beams of Nd:YAG laser with 532 nm wavelength and pulse duration of 10 ns were used to selectively remove material from the irradiated sample surface. This technique creates periodic pattern on the metallized surface of polymeric substrates. New sensors formed by direct laser interference patterning method were able to resolve higher order diffraction maxima, which would be of benefit for strain measurement application. Experimental setup for tensile tests was composed of laser probe, the sensor element, and CCD camera. To extract strain values, we analysed acquired interference pattern images in real time software, developed with LabVIEW environment. This kind of contactless strain sensor is suitable for examination of stretchable electronics component for which conventional tensile tests are either not acceptable or can interfere with its normal operation.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Geometry Characterization of AISI 430 Stainless Steel Microstructuring Using Laser
Autorzy:: Moldovan, Edit R.
Concheso Doria, Carlos
Ocaña Moreno, Jose Luis
Baltes, Liana Sanda
Stanciu, Elena Manuela
Croitoru, Catalin
Pascu, Alexandru
Tierean, Mircea Horia
Tematy:: microstructuring
laser
ferritic stainless steel
surface patterning; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/2106590.pdf Link otwiera się w nowym oknie
Opis:: Laser-generated surface patterns provide the means for local mechanical interlocking between the joined materials, tunes the wettability of surfaces that come in contact, and generally are the main factor for bonding strength enhancement, especially between dissimilar materials. This paper presents the influence of different patterning overlays generated with a pulsed laser on the surface of stainless-steel sheets. For all experiments, an overlapping degree of 90% has been chosen between three different patterns, while the engraving speed, pulse frequency and number of passes have varied. The textured surfaces’ morphology was assessed through optical microscopy, and the roughness of the surfaces was correlated with the corresponding experimental parameters. The results have indicated promising insights for joining stainless steel to plastic materials, which is otherwise difficult to assess through usual welding techniques.
Dostawca treści:: Biblioteka Nauki

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