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| Azevedo, Nuno Monteiro |
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Acciarri, Maurizio
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Publications (6/6 displayed)
- 2023Effect of the ZnSnO/AZO Interface on the Charge Extraction in Cd-Free Kesterite Solar Cellscitations
- 2022Kesterite thin-films deposited by sol-gel techniques with tunable bandgap as absorbers for photovoltaic applications
- 2022Band-Gap Tuning Induced by Germanium Introduction in Solution-Processed Kesterite Thin Filmscitations
- 2021Lenticular Ga-oxide nanostructures in thin amorphous germanosilicate layers - Size control and dimensional constraintscitations
- 2019Responsive charge transport in wide-band-gap oxide films of nanostructured amorphous alkali-gallium-germanosilicatecitations
- 2003Nanocrystalline SnO2-Based Thin Films Obtained by Sol−Gel Route: A Morphological and Structural Investigationcitations
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article
Nanocrystalline SnO2-Based Thin Films Obtained by Sol−Gel Route: A Morphological and Structural Investigation
Abstract
The thermal evolution of sol−gel SnO2-based thin films was explored by investigating their structural and morphological features. Nanostructured SnO2 and Pt-doped SnO2 layers were obtained using tetra(tert-butoxy)tin(IV) and Pt(II) acetlylacetonate as precursors. Films were prepared by spin coating from ethanol solutions with different viscosity. After drying at room temperature, they were annealed in air at 673 and 973 K. The surface morphology was analyzed by scanning electron microscopy, atomic force microscopy, and scanning near-field optical microscopy. The structural characterization was performed by means of glancing incidence X-ray diffraction and microdiffraction. Both drying at room temperature and thermal treatment at 673 K resulted in the formation of holes on the surface and inside the films. Their distribution and average dimension were found to depend mainly on the viscosity of the sol precursor, and on the presence of Pt in the films. After annealing at 973 K, surface segregation of PtOx p...