کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5186526 1381106 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrical and optical properties of a polyblend electrolyte
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Electrical and optical properties of a polyblend electrolyte
چکیده انگلیسی

A potassium ion conducting polyblend electrolyte based on polyvinyl pyrrolidone (PVP)+polyvinyl alcohol (PVA) complexed with KBrO3 was prepared using solution cast technique. The electrical conductivity increased with increasing dopant concentration. Optical absorption studies were made in the wavelength range (200-600 nm) on pure (PVP+PVA) and KBrO3 doped (PVP+PVA) films. The absorption edge was observed at 5.13 eV for undoped (PVP+PVA) while it ranged from 4.88 to 5.0 eV for differently KBrO3-doped samples. The direct band gaps for undoped and KBrO3 doped (PVP+PVA) films were found to be, respectively, 5.05 and 4.95, 4.86 and 4.90 eV while the indirect band gaps were 5.03 and 4.88, 4.79 and 4.83 eV, respectively. The absorption edge and the band gaps moved towards lower energies as the dopant concentration was increased up to 20 wt% of the dopant. For further increase in dopant concentration these values started increasing again. This is explained in terms of formation of charge transfer complexes between the dopant and the host matrix. The thermal properties of these films were investigated with differential scanning calorimetry (DSC). The variation in film morphology is examined by scanning electron microscopic examination.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 47, Issue 4, 8 February 2006, Pages 1318-1323
نویسندگان
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