Synergistic fabrication, characterization, and prospective optoelectronic applications of DES grafted activated charcoal dispersed PVA films

Author:

Lokesh Kumar S.1,Binish C. J.1,Rajprasad J.2,Tabassum Sumaiya3,Sadaiyandi Vivekananthan4,Ramaraj Sankar Ganesh56ORCID,Wadaan Mohammad Ahmad7,Vatin Nikolai Ivanovich89ORCID,Govindaraju Santhosh10,Vijayasankar A. V.1

Affiliation:

1. Department of Chemistry CHRIST (Deemed to be University) Bengaluru India

2. Department of Civil Engineering, College of Engineering and Technology SRM Institute of Science and Technology Kattankulathur Tamilnadu India

3. Department of Chemistry Surana College Bengaluru India

4. Department of Physics and Nanotechnology SRM Institute of Science and Technology Kattankulathur Tamilnadu India

5. Department of Bioengineering, Graduate School of Engineering The University of Tokyo Tokyo Japan

6. Department of Materials Physics, Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences (SIMTS) Chennai Tamilnadu India

7. Department of Zoology, College of Science King Saud University Riyadh Saudi Arabia

8. Peter the Great St. Petersburg Polytechnic University Saint Petersburg Russia

9. Division of Research and Development Lovely Professional University Phagwara Punjab India

10. Department of Sciences and Humanities CHRIST (Deemed to be University) Bengaluru India

Abstract

AbstractThis study investigates the synthesis, analysis, and utility of films comprising deep eutectic solvent (DES) grafted activated charcoal (AC) within a polyvinyl alcohol (PVA) matrix for optoelectronic device applications. The fabrication process involves the dispersion of DES functionalization AC into the PVA solution, followed by casting onto substrates with controlled drying. Comprehensive characterization encompassing X‐ray diffraction (XRD), scanning electron microscopy (SEM), UV–vis spectroscopy, Fourier‐transform infrared spectroscopy (FTIR), and impedance spectroscopy which discerns the films microstructure, morphology, conductance, band‐gap, and optical traits. The DES grafted AC infusion with variable concentration has significantly influenced optical absorbance and reduced the band gap indicating efficient charge mobility. Furthermore, the impedance analysis has revealed the electrical conduction of the film to be 1.8 × 10−6 Ω−1 m−1. In summary, the dispersion of DES modified AC in the PVA matrix have converted the insulating PVA to a semiconducting polymeric film with reduced band‐gap and increased absorption, which present a propitious avenue for wide array of optoelectronic devices, such as thin film transistors, photovoltaics, LEDs, photodetectors, and many such applications.

Funder

King Saud University

Publisher

Wiley

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