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الرئيسية > Characterising Optical Propert...>الوصف

Characterising Optical Properties of Doped Metal Complex Nanocomposite Films with PVA/PVAC for Optoelectronics

المصدر: المجلة العلمية لجامعة الملك فيصل - العلوم الأساسية والتطبيقية
الناشر: جامعة الملك فيصل
المؤلف الرئيسي: Abd Al-Kader, Dawood Salman (Author)
مؤلفين آخرين: Roomy, Harakat Mohsin (Co-Author)
المجلد/العدد: مج25, ع2
محكمة: نعم
الدولة: السعودية
التاريخ الميلادي: 2024
التاريخ الهجري: 1445
الصفحات: 57 - 62
ISSN: 1658-0311
رقم MD: 1524440
نوع المحتوى: بحوث ومقالات
اللغة: الإنجليزية
قواعد المعلومات: science
مواضيع:
مطيافية الامتصاص | الخصائص البصرية | بولي فينيل الكحول | فجوة الطاقة
كلمات المؤلف المفتاحية:
Absorbance Spectrum | Casting Method | Energy Gap | Polyblend | Polyvinyl Acetate | Polyvinyl Alcohol
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المستخلص: This study investigates the optical properties of nanocomposite films made from polyvinyl alcohol (PVA), polyvinyl acetate (PVAC), and a 50/50 polyblend of PVA and PVAC, doped with varying concentrations 0, 3, 6, and 9 wt.% of the metal complex Fluoro pentaamine cobalt (III) fluoride [Co(NH₃)₅F]F₂ (FACF). The films were prepared using a solvent casting method and analysed with a computerised UV VIS IR spectrophotometer over the wavelength range of 250–850 nm. Key optical parameters, including the refractive index, extinction coefficient, and optical conductivity, were determined through absorption studies. The optical absorbance increased with higher FACF concentrations. UV-Vis spectra were used to estimate the band gap energies and investigate the electronic transitions from the valence band to the conduction band. A decrease in the band gap for allowed direct transitions was observed: from 4.0 eV to 2.55 eV for PVA, 4.1 eV to 2.6 eV for PVAC, and 4.35 eV to 2.6 eV for the polyblend as the FACF content increased. Additionally, both the extinction coefficient and refractive index increased with higher FACF concentrations. These nanocomposite films show potential for use in photovoltaic cells, optical sensors, LEDs, photodetectors and other luminescent devices, though further research is needed.
ISSN: 1658-0311

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