Nonlinear optical parameters and electronic properties of plasma polymerized methyl acrylate thin films.

Autor: Nath SD; Department of Physics, Khulna University of Engineering & Technology (KUET), Khulna, 9203, Bangladesh.; Department of Physics, Bangladesh University of Engineering and Technology (BUET), Dhaka, 1000, Bangladesh., Bhuiyan AH; Department of Physics, Bangladesh University of Engineering and Technology (BUET), Dhaka, 1000, Bangladesh.; University of Information Technology and Sciences, Baridhara, Dhaka, 1212, Bangladesh.
Jazyk: angličtina
Zdroj: Heliyon [Heliyon] 2024 Oct 25; Vol. 10 (21), pp. e39800. Date of Electronic Publication: 2024 Oct 25 (Print Publication: 2024).
DOI: 10.1016/j.heliyon.2024.e39800
Abstrakt: Plasma polymerized methyl acrylate (PPMA) thin films were fabricated on a borosilicate glass substrate at a plasma power of 28 W to study nonlinear optical parameters and electronic properties. X-ray Diffraction analysis confirmed the amorphous nature of the PPMA films, while Attenuated total reflectance Fourier transform infrared spectroscopy indicated monomer fragmentation due to plasma polymerization. Field emission scanning electron microscope images of the films display a water wave-like structure. PPMA films demonstrated thermal stability up to approximately 574 K in both N 2 and air environments. The values of direct band gap energies increase from 3.30 to 3.41 eV with increasing film thicknesses, whereas the Urbach energy values show in an opposite manner. The Wemple-DiDomenico model was employed to analyze both the oscillator energies ranging from 5.54 to 6.44 eV and the dispersion energies ranging from 10.56 to 12.89 eV. The static linear refractive index showed typical dispersion behavior, with film thickness conforming to Moss's rule. The nonlinear refractive index and 2nd and 3rd order nonlinear susceptibilities decrease with increasing the studied films. The lattice dielectric constant values exceeded the high-frequency dielectric constant, indicating the presence of lattice vibrations and free carriers. Electronic parameters are fluctuating with increasing film thickness. The observed changes in nonlinear optical parameters and electronic properties highlight the potential of PPMA films for applications in photovoltaic and optoelectronics.
Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(© 2024 The Authors.)
Databáze: MEDLINE
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