Several optoelectronic applications require transparent and conductive "lms, usually deposited by RF- magnetron sputtering, interfaced with a TiO2 compact or mesoporous layer, deposited in subsequent processes. Here we report on the direct fabrication by RF-magnetron sputtering of mesoporous ITO/TiO2 heterojunctions, exhibiting enhanced charge-transfer properties. The mesoporous morphology was obtained by tuning the sputtering deposition parameters. Scanning Electron Microscopy provided a deeper insight into the electrode building, which resulted composed by a compact ITO layer, tapered with columnar ITO nanocrystals, completely covered with jagged anatase TiO2 cauli!ower-like structures. Such mesoporous electrodes exhibited enhanced electrochemical performances, compared to those of compact thin-"lm heterojunctions, due to the enhanced charge transfer at the ITO/TiO2 interface.

Synthesis of mesoporous ITO/TIO2 electrodes for optoelectronics

El Koura, Zakaria;Bazzanella, Nicola;Miotello, Antonio
2015-01-01

Abstract

Several optoelectronic applications require transparent and conductive "lms, usually deposited by RF- magnetron sputtering, interfaced with a TiO2 compact or mesoporous layer, deposited in subsequent processes. Here we report on the direct fabrication by RF-magnetron sputtering of mesoporous ITO/TiO2 heterojunctions, exhibiting enhanced charge-transfer properties. The mesoporous morphology was obtained by tuning the sputtering deposition parameters. Scanning Electron Microscopy provided a deeper insight into the electrode building, which resulted composed by a compact ITO layer, tapered with columnar ITO nanocrystals, completely covered with jagged anatase TiO2 cauli!ower-like structures. Such mesoporous electrodes exhibited enhanced electrochemical performances, compared to those of compact thin-"lm heterojunctions, due to the enhanced charge transfer at the ITO/TiO2 interface.
Binetti, Enrico; El Koura, Zakaria; Bazzanella, Nicola; Carotenuto, Gianfranco; Miotello, Antonio
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/140565
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