ArticleScientific reports2026
Fabrication and characterization of eco-friendly PVA/chitosan/TEA-TOS composites as a potential light-absorbing material for energy storage and optoelectronics.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The need for efficient and reliable multifunctional optical and optoelectronic devices is driving the development of new materials. In this work, a novel eco-friendly biopolymer composite based on PVA, chitosan, and the ionic liquid [TEA-TOS] is developed as an efficient light-absorbing material for energy storage and optoelectronic applications. PVA/chitosan/[TEA-TOS] composites are successfully prepared using casting technique. The molecular structure and interaction between the PVA/Cs matrix and the [TEA-TOS] ionic liquid are evaluated using X-ray diffraction (XRD) and FTIR spectroscopy. XRD analysis showed that crystallinity is reduced from 55.65% for PVA/Cs blend to 29.82% for PVA/Cs/40 wt% TEA-TOS composite. The shifts and changes in the intensity of the FTIR bands of the PVA/Cs blend upon incorporation of [TEA-TOS] showed the formation of strong intermolecular interactions between PVA/Cs and [TEA-TOS]. The energy gap and Urbach energy values, as well as linear/nonlinear optical parameters of the composites are estimated. It is found that the bandgap reduced from 5.62/5.01 eV for pure PVA/Cs to 5.00/4.68 eV for PVA/Cs/40 wt% [TEA-TOS], indicating improved optoelectronic performance. UV-Vis spectroscopy demonstrated confirmed that the optical properties of the samples could be tailored by adjusting the [TEA-TOS] content. The Wemple model further confirmed the modification of electronic transitions, demonstrating that the incorporation of [TEA-TOS] effectively tunes the optical behavior of PVA/Cs films for potential optoelectronic applications.
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