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Red photoluminescence and blue-shift caused by phase transformation in multilayer films of titanium dioxide and zinc sulfide

Title
Red photoluminescence and blue-shift caused by phase transformation in multilayer films of titanium dioxide and zinc sulfide
Authors
Choi, ByeongdaeShim, HyunseokAllabergenov, Bunyod
DGIST Authors
Choi, Byeongdae
Issue Date
2015-10-01
Citation
Optical Materials Express, 5(10), 2156-2163
Type
Article
Article Type
Article
Keywords
Amorphous FilmsAnnealingCatalystsCatalytic AgentsModification of MaterialsMulti-Layer FilmsMulti-Layered FilmsPhase TransitionsPhotoluminescencePhotoluminescence PropertiesPulsed Laser DepositionRed EmissionsRed PhotoluminescenceTitanium DioxideVacuum-AnnealingVersatile MethodsZinc Sulfide
ISSN
2159-3930
Abstract
The most versatile methods for altering the properties and behavior of materials involve a phase transformation in the solid state. In this article, we report multilayered films of ZnS/TiO2/ZnS on amorphous SiOx/Si substrates by pulsed laser deposition (PLD). After sequential vacuum annealing at various temperatures, we investigated the effects of TiO2 on the phase transformation of ZnS films and the consequential changes in photoluminescence (PL) property. PL spectra of the film revealed red emission centered at 686 nm after annealing at 600°C, however, this emission disappears, and the color shifts to blue after annealing at 700°C. Detailed analysis identified that TiO2 acts as a catalytic agent for the phase transformation of ZnS at this temperature, and that the color shift to blue resulted from decreased red emissions attributed to oxygen in the film. The present results show that catalytic agent-mediated phase transformation has strong potential for the modification of material properties. © 2015 Optical Society of America.
URI
http://hdl.handle.net/20.500.11750/5165
DOI
10.1364/OME.5.002156
Publisher
OSA - The Optical Society
Related Researcher
Files:
There are no files associated with this item.
Collection:
Intelligent Devices and Systems Research Group1. Journal Articles


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