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Characterization of optical, electrical and structural properties of silverphthalocyanine thin films

  • O. P. JaseenthaEmail author
  • C. S. Menon
Article

Abstract

Silverphthalocyanine thin films are deposited on to glass substrates by thermal evaporation technique. Optical data have been obtained from both absorption and reflectivity spectra over the wavelength range 350–900 nm. The absorption coefficient α and extinction coefficient k are estimated from the spectrum. The mechanism of optical absorption follows the rule of direct transition. Using α and k, the refractive index and the dielectric constants are determined. Electrical conductivity studies are done at different substrate temperatures and using the Arrhenius plot the activation energy in the intrinsic region and impurity region is estimated. From the X-ray diffractograms of AgPc thin films subjected to heat treatments the variation of grain size is also studied. The scanning electron microscopy images are taken to study the surface morphology of the films. Silver phthalocyanine thin film is expected to find application in the fabrication of organic transistors and LED devices.

Keywords

Substrate Temperature Phthalocyanine Fundamental Absorption Edge High Substrate Temperature Thermal Activation Energy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

List of Symbols

α

Absorption coefficient alpha

Photon energy

λ

Wavelength

k

Extinction coefficient

R

Reflectance

n

Refractive index

ε1

Real dielectric constant

ε2

Imaginary dielectric constant

kb in 3.26

Boltzmann constant

σ

Electrical conductivity

η

Eta-width of strongest peak

Notes

Acknowledgement

We extend our sincere feeling of gratitude to Government of India, State Government of Kerala and Nirmala College, Muvattupuzha for the award of fellowship under FIP of UGC to complete this work.

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.School of Pure and Applied PhysicsMahatma Gandhi UniversityKottayamIndia

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