Abstract
Tuning the dielectric constant of the optical materials is of prime importance to optimize their efficiency. Polyvinyl alcohol and tetra ethylene glycol dimethyl (TEGDME) matrix hybrid nanocomposites, featuring zinc oxide embedded in the polymer were fabricated by solution casting technique. TEM images showed that the introduction of tetra ethylene glycol dimethyl ether reduces the dimensions of ZnO particles and displays good distribution of the zinc oxide nanoparticles with very little particle agglomeration, respectively. The presence of tetra ethylene glycol dimethyl ether increases the optical energy gap of the composite from 3.6 to 4 eV. The Intensity and broadening of photoemission increase with increasing the ratio of TEGDME. The I–V measurements of the fabricated Cu/(PVZO/TEGDME)/Cu cell under different sun light intensity revealed that the resistivity of the composite decreases with increasing sun light intensity and the presence of tetra ethylene glycol dimethyl ether reduces the resistivity and increases the sensitivity of the composite to sun light. The tunable dielectric constant and optical properties of these polymer composites are demonstrated by increasing the TEGDME contents in the composites, making these composites potentially useful for optimizing optical and electronic devices.
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Funding was provided by Benha University and National Institute of standards.
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Elkalashy, O., Sheha, E. Attempt to tune the dielectric and optical properties in PVA/ZnO composite using tetra ethylene glycol dimethyl ether for light emitting devices. Appl. Phys. A 124, 549 (2018). https://doi.org/10.1007/s00339-018-1970-1
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DOI: https://doi.org/10.1007/s00339-018-1970-1