Dispersive parameters of oxidized PVA-PVP blend films

Goputta VEENA; Blaise LOBO

Makale detayları

Dispersive parameters of oxidized PVA-PVP blend films

Yazarlar:

Goputta VEENA | Blaise LOBO

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Physics 2019 Vol.43 Issue 4, pp.337-354

Belge Tipi:

Makale

Yayın Tarihi:

7/2019

Belge Dili:

İngilizce

Document ID (Org No.):

2000758975

Sıklık:

İki Aylık

eISSN:

1303-6122

pISSN:

1300-0101

Özet:

 

Oxidized (ox) polyvinyl alcohol (PVA)-polyvinyl pyrrolidone (PVP) blend films were prepared by solution  casting technique, with doping levels of the oxidizer, potassium permanganate (KMnO4) , varying from 0.01 up to 4.70  weight percent (wt.%). Optical (UV-Vis) spectral measurements in the wavelength range varying from 190 nm to 1000  nm were used to extract the band gap information and to calculate various optical parameters of the ox-PVA-PVP  blend films. The electronic transitions on absorption of photons of suitable energy are of indirect allowed type. The  corresponding optical band gap (Eg) has been determined. Optical dispersion parameters for ox-PVA-PVP films were  determined using the Wemple and Didomenico method. Complex dielectric constants, relaxation time (τ) , dissipation  factor (tan δ) , ratio of charge carrier concentration to effective mass (N/m*), plasma frequency (ωp) , average oscillator  wavelength (λo) , oscillator strength (So) , optical conductivity (σ) , and optical momenta of spectra (M-1 and M-3)  were determined.

Makale detayları

Dispersive parameters of oxidized PVA-PVP blend films

Yazarlar: Goputta VEENA | Blaise LOBO

Yayıncı: TUBITAK

Dergi: Turkish Journal of Physics 2019 Vol.43 Issue 4, pp.337-354

Belge Tipi: Makale

Yayın Tarihi: 7/2019

Belge Dili: İngilizce

Document ID (Org No.): 2000758975

Sıklık: İki Aylık

eISSN: 1303-6122

pISSN: 1300-0101

Sayı

Yazarlar:

Goputta VEENA | Blaise LOBO

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Physics 2019 Vol.43 Issue 4, pp.337-354

Belge Tipi:

Makale

Yayın Tarihi:

7/2019

Belge Dili:

İngilizce

Document ID (Org No.):

2000758975

Sıklık:

İki Aylık

eISSN:

1303-6122

pISSN:

1300-0101