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- Title
Electric field-induced changes in photoluminescence and Raman spectra of MoS<sub>2</sub> on PVA-coated conductive substrate with nematic liquid crystals: a combined numerical and experimental study.
- Authors
Kashif, Muhammad; Shabbir, Altamash
- Abstract
Transition metal dichalcogenides, particularly Molybdenum Disulphide (MoS2), have garnered significant attention in scientific research due to their remarkable optoelectrical characteristics. In this study, the characteristics of MoS2 flakes deposited on indium tin oxide (ITO) glass slides coated with polyvinyl alcohol (PVA) were investigated. The influence of a strain stimulus provided by a nematic liquid crystal (NLC) called 5CB on the MoS2 structure was studied using Raman polar plots, revealing its potential as an electrically controlled light controller. The analysis of Raman Shift showed that the application of tensile strain-induced defects in the MoS2 structure resulted in a lowered bandgap energy level. Photoluminescence (PL) spectroscopy demonstrated that the combination of 5CB and an electric field enhanced the exciton lifetime and decreased the bandgap energy levels. The study employed theoretical and computational modeling of PL/Raman techniques for qualitative and quantitative analysis of the PVA-coated ITO-MoS2 sample. The utilization of Mathematica v 9.0 contributed to the accuracy and reliability of the results, ensuring robust analysis and interpretation of the experimental data. These findings contribute to the understanding of strain-induced effects on MoS2 and highlight the potential of using NLCs for optoelectronic control in MoS2-based devices.
- Subjects
RAMAN spectroscopy; NEMATIC liquid crystals; POLYMER liquid crystals; PHOTOLUMINESCENCE; INDIUM tin oxide; OPTOELECTRONIC devices; MOLYBDENUM disulfide; POLYVINYL alcohol
- Publication
Journal of Materials Science: Materials in Electronics, 2024, Vol 35, Issue 14, p1
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-024-12714-1