Staff Members - Benha University
Electric and dielectric properties of some luminescent solar collectors based on phthalocyanines and hematoporphyrin doped PMMA
• 2007
Publication Information
Authors
S.M. Reda
Keywords
Not Available
Journal
Not Available
Publisher
Not Available
Volume
Not Available
Issue
Not Available
Pages
Not Available
publication.type
International
Paper Link
Open Link
Supplementary Materials
Not Available
Abstract
The electrical properties: DC-electrical conductivity (sDC), AC-electrical conductivity (sAC), dielectric permittivity (3 0) and dielectric loss
(300) for pure polymethylmethacrylate (PMMA) and mixed with phthalocyanine, Ni-phthalocyanine and hematoporphyrin IX chloride laser dyes
have been investigated. The conductivity values for all polymeredye samples are higher than that of the pure PMMA. For all investigated samples,
at the constant temperature, the frequency dependence of (sAC) was found to obey the relation (sAC) ¼ Aus. The results are discussed according
to the correlated barrier hopping CBH mechanism from which the Coulomb well barrier of charge carriers (WM) was calculated. For the
dye-doped samples, the hematoporphyrin IX chloride mixed sample showed the larger value of (WM) compared with the others. At all frequencies,
3 0 values for doped samples are higher than that of pure one. This is due to a free volume enhancement offered by the large size of the dye
molecule. Also, the addition of dyes to PMMA causes an increase in the intensity of the loss peak (300) accompanied by a shift in its position. The
effect of chemical structure of investigated dyes on the electrical properties is discussed.
(300) for pure polymethylmethacrylate (PMMA) and mixed with phthalocyanine, Ni-phthalocyanine and hematoporphyrin IX chloride laser dyes
have been investigated. The conductivity values for all polymeredye samples are higher than that of the pure PMMA. For all investigated samples,
at the constant temperature, the frequency dependence of (sAC) was found to obey the relation (sAC) ¼ Aus. The results are discussed according
to the correlated barrier hopping CBH mechanism from which the Coulomb well barrier of charge carriers (WM) was calculated. For the
dye-doped samples, the hematoporphyrin IX chloride mixed sample showed the larger value of (WM) compared with the others. At all frequencies,
3 0 values for doped samples are higher than that of pure one. This is due to a free volume enhancement offered by the large size of the dye
molecule. Also, the addition of dyes to PMMA causes an increase in the intensity of the loss peak (300) accompanied by a shift in its position. The
effect of chemical structure of investigated dyes on the electrical properties is discussed.