Electrochemical properties of surface modified sprayed SnO2 films

✍ Scribed by J. Bruneaux; H. Cachet; M. Froment; A. Messad

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 586 KB
• Volume: 36
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(91)85045-9

✦ Synopsis

Photoinduced deposition of platinum onto sprayed SnOr thin films is studied under open circuit conditions and continuous exposure to intense uo radiation provided by a xenon lamp. The amount of deposited Pt is measured by Energy Dispersive X-ray Analysis and Rutherford Back Scattering as a function of time of exposure. It is found to be dependent on the 6lm substrate, which is either a glass sheet or a n-type silicon (100) wafer. The deposition rate is five times higher with Si substrate than with glass substrate. It is observed that metal deposition is local&d in the spot area only for SnO,/glass system. These results are explained by considering electron injection from Si to the conduction band of SnO, . The application of discontinuous metal deposition in improving transfer kinetics is demonstrated in the case of transparent electrodes and that of heterojunction photoelectrodes.