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Optical and electrical properties of polythiophene thin films: Effect of post deposition heating

S. V. KAMAT1, S. H. TAMBOLI1, VIJAYA PURI1, R. K. PURI1,* , J. B. YADAV2, OH SHOM JOO3

Affiliation

  1. Vacuum Techniques & Thin Film Lab., USIC, Shivaji University, Kolhapur, India
  2. Department of Physics, Shivaji University, Kolhapur- 416004, India
  3. Clean Energy Research Centre, Korea Institute of Science and Technology, Seoul, South Korea.

Abstract

This article reports the effect of post deposition heating on the optical and mechanical properties of polythiophene thin film prepared by vacuum evaporation technique. The post deposition heating strongly affects on the structural, surface morphological, optical and electrical properties. As deposited thin film showed uniform surface morphology with very small grain size, whereas the heat treated thin film was highly dense with larger grains. It was observed that, the absorbance of the polythiophene thin films increases due to post deposition heating, while the band gap found to be decrease and refractive index increases. However the activation energy of the polythiophene thin films was decreased due to post deposition heating..

Keywords

Thin films, Polythiophene, Optical properties, electrical properties.

Submitted at: Oct. 11, 2010
Accepted at: Nov. 19, 2010

Citation

S. V. KAMAT, S. H. TAMBOLI, VIJAYA PURI, R. K. PURI, J. B. YADAV, OH SHOM JOO, Optical and electrical properties of polythiophene thin films: Effect of post deposition heating, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 11, pp. 2301-2305 (2010)