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Understanding the unusual photoluminescence properties of SiOx nanoropes prepared by thermal evaporation method

Senapati, Subrata and Rath, Ashutosh and Nanda, Karuna Kar (2018) Understanding the unusual photoluminescence properties of SiOx nanoropes prepared by thermal evaporation method. In: APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 124 (1).

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Official URL: http://dx.doi.org/10.1007/s00339-017-1480-6

Abstract

We report the indium oxide catalyzed growth of the amorphous SiOx nanoropes using the silicon wafer as both source-cum-substrates by thermal evaporation and investigate the luminescence properties. Both blue and yellow emissions are observed from the nanoropes. Blue emission could be attributed to the defect centers of the oxygen deficiency in the nanoropes, whereas yellow emission is due to the trapped excitons in the Si/SiOx interface of the materials. Effect of laser exposure on luminescence properties is studied by performing time-dependent PL measurements at different ambiance. Irrespective of laser excitation and ambiance, a monoexponential decay of blue emission with continuous laser exposure is clearly observed, which is due to the gradual removal of surface adsorbed species.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Depositing User: Id for Latest eprints
Date Deposited: 02 Mar 2018 15:07
Last Modified: 02 Mar 2018 15:07
URI: http://eprints.iisc.ac.in/id/eprint/58887

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