Emerging photoluminescence from defective vanadium diselenide nanosheets

Date
2018
Editor(s)
Advisor
Supervisor
Co-Advisor
Co-Supervisor
Instructor
Source Title
Photonics Research
Print ISSN
2327-9125
Electronic ISSN
Publisher
OSA - The Optical Society
Volume
6
Issue
4
Pages
244 - 253
Language
English
Journal Title
Journal ISSN
Volume Title
Series
Abstract

In this paper, for the first time to our knowledge in the literature, we demonstrate photoluminescence from two-dimensional (2D) vanadium diselenide (VSe2) nanosheets (NSs). The preparation of these nanostructures is carried out with a combinational method based on nanosecond pulsed laser ablation (PLA) and chemical exfoliation. For this aim, VSe2 bulk is first ablated into nanoparticles (NPs) inside a water solution. Afterward, NPs are chemically exfoliated into NSs using lithium intercalation via ultrasonic treatment. Although VSe2 is a semimetal in its bulk form, its nanostructures show photo-responsive behavior, and it turns into a strongly luminescent material when it is separated into NSs. Based on the obtained results, the surface defects induced during the PLA process are the origin of this photoluminescence from NSs. Our findings illustrate that this new material can be a promising semiconductor for photovoltaic and light emitting diode applications.

Course
Other identifiers
Book Title
Keywords
Citation
Published Version (Please cite this version)