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Enhanced Visible Light Conversion Efficiency Using Nanocrystalline WO 3 Films
Author(s) -
Santato C.,
Ulmann M.,
Augustynski J.
Publication year - 2001
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/1521-4095(200104)13:7<511::aid-adma511>3.0.co;2-w
Subject(s) - tungstic acid , materials science , photoelectrolysis , nanocrystalline material , photocurrent , optoelectronics , tungsten trioxide , saturation (graph theory) , visible spectrum , electrode , chemical engineering , electrolysis , nanotechnology , electrolyte , tungsten , metallurgy , chemistry , mathematics , combinatorics , engineering
Drastically improved photooxidation efficiencies ,when compared to bulk WO 3 , are obtained with nanocrystalline WO 3 films (see Figure) deposited from a colloidal solution of tungstic acid. Saturation of the photocurrent, which occurs even for moderate potential differences, indicates a completely different mechanism of charge separation. The electrodes should be highly effective for photoelectrolysis of water by sunlight.