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Aver'yanov, E. M.
Anisotropy of the Local Field in Anisotropic Films of Conjugated Polymers / E. M. Aver'yanov // Phys. Solid State. - 2011. - Vol. 53, Is. 9. - P. 1933-1942, DOI 10.1134/S1063783411090046. - Cited References: 51 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
MOLECULAR-WEIGHT DEPENDENCE
   OPTICAL-PROPERTIES
   THIN-FILMS
   MEH-PPV
   POLY(P-PHENYLENE VINYLENE)
   CHAIN ORIENTATION
   REFRACTIVE-INDEX
   CONSTANTS
   POLYACETYLENE
   LIGHT
Аннотация: Using the data on dispersion of refractive indices in the visible region, the experimental values of the components L-j of the Lorentz tensor have been obtained for uniaxial (crystalline, oriented on a substrate, and stretched) films of conjugated polymers from nanometer to micrometer thicknesses. The dependence of the components L-j on the axial and planar orientations of macromolecules with respect to the optical axis of the film, technology of fabricating the films, and chemical structure of macromolecules has been elucidated. The correlation between the components L-j and the measured parameter. has been determined and the analytical dependence L-j(eta) for films with both types of macromolecular orientation has been established. In the visible region (0

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Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Akademgorodok 50-38, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Аверьянов, Евгений Михайлович
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Aver'yanov, E. M.
Influence of the dimension of a polycrystalline film and the optical anisotropy of crystallites on the effective dielectric constant of the film / E. M. Aver’yanov // Phys. Solid State. - 2016. - Vol. 58, Is. 8. - P. 1634-1641, DOI 10.1134/S1063783416080035. - Cited References: 41 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
EFFECTIVE REFRACTIVE-INDEX
   CONJUGATED POLYMER
   POLY(P-PHENYLENE VINYLENE)
   SPECTROSCOPIC ELLIPSOMETRY
   ELECTRICAL-CONDUCTIVITY
   LOCAL-FIELD
   THIN-FILMS
   DISPERSION
   POLYFLUORENE
   DEVICES
Аннотация: The dimension D of a polycrystalline film and the optical anisotropy m = εz/εx of uniaxial crystallites with the principal components εx = εy and εz of the tensor of the dielectric constant have been shown to produce a strong influence on the effective dielectric constant εD* and the effective refractive index nD* = (εD*)1/2 of the film in the optical transparency region, as well as on the boundaries of the intervals BDl ≤ εD* ≤ BDu. The intervals Δ2(m) = B2l–B2u and Δ3(m) = B3l–B3u are separated by a gap for m in the range 1 m 2, whereas the theoretical dependence ε2*(m) is separated by a gap from the interval Δ3(m) for m in the range 1 m 4. This is confirmed by a comparison of the experimental (noP) and theoretical (nD*) ordinary refractive indices for uniaxial polycrystalline films of the conjugated polymer poly(p-phenylene vinylene) (PPV) with uniaxial crystallites and appropriate values of m. In the visible transparency region of the PPV films with a change in m(λ) in the range 2 m(λ) 3 due to the dependence of the components εx,z(λ) on the light wavelength λ, the refractive indices noP2(λ) 3 near the electronic absorption band of the crystallites, the values of εoP(λ) lie in the region of the overlap of the intervals Δ2(m) and Δ3(m). The boundaries mc of the range 1 m mc are determined, for which the interval Δ2(m) is separated by a gap from the dependences ε3*(m) corresponding to the effective medium theory with spherical crystallites and hierarchical models of a polycrystal, as well as from the proposed new dependence ε3*(m).

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Публикация на русском языке Аверьянов, Евгений Михайлович. Влияние размерности поликристаллической пленки и оптической анизотропии кристаллитов на эффективную диэлектрическую проницаемость пленки [Текст] / Е. М. Аверьянов // Физ. тверд. тела : Физико-технический институт им. А. Ф. Иоффе РАН, 2016. - Т. 58 Вып. 8. - С. 1580–1586

Доп.точки доступа:
Аверьянов, Евгений Михайлович
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