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TiO sub (2) thin films were deposited at an effective surface temperature of 150 degree C by dc-reactive magnetron sputtering on ZnO: Al oriented substrates having a fiber texture along the[0001] axis, and studied by transmission electron microscopy and x-ray diffraction analyses. The substrate texturing was used to tailor the TiO sub (2) structure in such a way that a porous matrix made of anatase nano-grains(10 nm in diameter) is formed instead of an amorphous layer(as observed at 150 degree C on glass). Additionally, we demonstrate that, by adding an ex situ 200 degree C annealing, the anatase domains also gain a fiber texture with the axes aligned to that of the substrate. The TiO sub (2) AZO structural coupling is expected to play a crucial role for the carrier transport through the interface as required in dye-sensitized solar cells. Moreover, the low temperatures used render the process compatible with …
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Publication date: 
1 Jan 2012

G Pellegrino, C Bongiorno, S Ravesi, A Alberti

Biblio References: 
Volume: 45 Issue: 35
Journal of Physics D: Applied Physics