Abstract
Visually black, electrically leaky, amorphous titania (am-TiO2) thin films were grown by atomic layer deposition (ALD) for photocatalytic applications. Broad spectral absorbance in the visible range and exceptional conductivity are attributed to trapped Ti3+ in the film. Oxidation of Ti3+ upon heat treatment leads to a drop in conductivity, a color change from black to white, and crystallization of am-TiO2. ALD-grown black TiO2, without any heat treatment, is subject to dissolution in alkaline photoelectrochemical conditions. The best photocatalytic activity for solar water splitting is obtained for completely crystalline white TiO2.
Original language | English |
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Pages (from-to) | 2758–2762 |
Number of pages | 5 |
Journal | ACS Applied Materials & Interfaces |
Volume | 11 |
Issue number | 3 |
DOIs | |
Publication status | Published - 4 Jan 2019 |
Publication type | A1 Journal article-refereed |
Publication forum classification
- Publication forum level 2
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Dive into the research topics of 'Diversity of TiO2: Controlling the molecular and electronic structure of atomic layer deposited black TiO2'. Together they form a unique fingerprint.Equipment
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Material characterization of physics
Lahtonen, K. (Contact) & Tukiainen, A. (Contact)
PhysicsFacility/equipment: Facility
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Photonic materials
Tukiainen, A. (Contact) & Lahtonen, K. (Contact)
PhysicsFacility/equipment: Facility
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Tampere Microscopy Center
Vippola, M. (Manager), Honkanen, M. (Operator) & Salminen, T. (Operator)
Faculty of Engineering and Natural SciencesFacility/equipment: Facility