Optical properties of phthalocyanine thin films: A short review

Rajesh. K. R; Sruthy. N. S; Menon. C. S; Indulal. C. R

doi:10.30574/ijsra.2025.16.2.2309

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Optical properties of phthalocyanine thin films: A short review

Rajesh. K. R ^{1, *}, Sruthy. N. S. ¹, Menon. C. S. ²and Indulal. C. R ³

¹ Post Graduate and Research Department of Physics, Sree Krishna College Guruvayur, affiliated to the University of Calicut, Thrissur, 680102, India.

² School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam, 686560, India.

³ Department of Physics, St. Gregorios College, affiliated to the University of Kerala, Kottarakkara, 691531 India.

Review Article

International Journal of Science and Research Archive, 2025, 16(02), 186-191

Article DOI: 10.30574/ijsra.2025.16.2.2309

DOI url: https://doi.org/10.30574/ijsra.2025.16.2.2309

Publication history

Received on 26 June 2025; revised on 02 August 2025; accepted on 04 August 2025

Abstract

Phthalocyanine (Pc) thin films have garnered substantial interest for their exceptional optical properties and structural versatility, making them ideal candidates for optoelectronic applications. This review critically examines the optical characteristics of thermally evaporated Pc thin films, with emphasis on band gap energy, dielectric constants, UV-visible absorption, and reflectance. The impact of molecular structure, film morphology, and annealing on the optical band gap is explored in detail. Dielectric analysis reveals significant dispersion behaviour influenced by molecular ordering and deposition parameters. UV-visible spectra display intense Q- and B-band absorptions, with spectral shifts governed by film thickness and crystallinity. Reflectance and refractive index data highlight the strong absorption and interference effects in the near-infrared region. Recent advancements, including hybrid Pc architectures and nanoscale engineering, offer further tunability. This review consolidates key experimental insights and recent developments, providing a foundation for future research in organic optoelectronic materials.

Keywords

Organic Semiconductor; Phthalocyanines; Thin Films; Optical Properties

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How to cite this article

Rajesh. K. R, Sruthy. N. S, Menon. C. S and Indulal. C. R. Optical properties of phthalocyanine thin films: A short review. International Journal of Science and Research Archive, 2025, 16(02), 186-191. Article DOI: https://doi.org/10.30574/ijsra.2025.16.2.2309.

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