Change in photoluminescence from Er-doped TiO2 thin films induced by optically assisted reduction
Creators
- 1. Department of Physics, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo 162-8601 (Japan)
- 2. Faculty of Engineering, Toyo University, Kawagoe, Saitama 350-8585 (Japan)
Description
Erbium-doped TiO2 (TiO2:Er) thin films with the anatase structure have been prepared on Si substrate by laser ablation. Sharp and intense Er-related emission in the visible region as well as in the IR region has been observed under over-band-gap excitation. The broad photoluminescence (PL) peaking at about 530 nm newly appears at low temperature. It has been understood that the broad PL is induced by an optically assisted reduction effect that is caused by both the H2O adsorption and the reduction process of TiO2 to Ti2O3 by UV illumination. In the IR region, Er-related emission consisted of one main peak located at 1.534 μm and many subpeaks located at around 1.54 μm can be observed even at room temperature. The drastic thermal quenching of the Er-related 1.54 μm emission is also considered due to the optically assisted reduction effect
Additional details
Identifiers
- DOI
- 10.1063/1.1530733;
Publishing Information
- Journal Title
- Applied Physics Letters
- Journal Volume
- 81
- Journal Issue
- 25
- Journal Page Range
- p. 4733-4735
- ISSN
- 0003-6951
- CODEN
- APPLAB
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 35024292
- Subject category
- S36: MATERIALS SCIENCE; S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
- Descriptors DEI
- ABLATION; ADSORPTION; ERBIUM; OPTICAL PROPERTIES; PHOTOCHEMISTRY; PHOTOLUMINESCENCE; QUENCHING; REDUCTION; THIN FILMS; TITANIUM OXIDES; VISIBLE RADIATION
- Descriptors DEC
- CHALCOGENIDES; CHEMICAL REACTIONS; CHEMISTRY; ELECTROMAGNETIC RADIATION; ELEMENTS; EMISSION; FILMS; LUMINESCENCE; METALS; OXIDES; OXYGEN COMPOUNDS; PHOTON EMISSION; PHYSICAL PROPERTIES; RADIATIONS; RARE EARTHS; SORPTION; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Notes
- (c) 2002 American Institute of Physics.