Abstract
ZnPc thin films were prepared by pulsed laser deposition (KrF laser, λ = 248 nm, τ = 5 ns, f = 50 Hz) on suprasil substrates in vacuum. Optical properties in UV–Vis spectral region were analyzed as functions of laser fluence from 40 to 100 mJ/cm2 by spectrophotometric and spectral ellipsometry measurements. The spectral ellipsometry data were treated using a three-layer model (substrate, film, roughness). The best results of data fitting were obtained when Q band was characterized by two Lorentz oscillators, while two Gaussian oscillators were used for B and C band fitting. We derived the band gap using Tauc plot considering ZnPc a direct band gap semiconductor. The band gap values were found decreasing from 3.13 to 3.09 eV with increasing laser fluence, which might be related with formation of trapping sites at higher fluence.
Similar content being viewed by others
References
M. Pfeiffer, K. Leo, X. Zhou, J.S. Huang, M. Hofmann, A. Werner, J. Blochwitz-Nimoth, Org. Electron. 4, 89 (2003)
S. Senthilarasu, S. Velumani, R. Sathyamoorthy, A. Subbarayan, J.A. Ascencio, G. Canizal, P.J. Sebastian, J.A. Chavez, R. Perez, Appl. Phys. A. 77, 383 (2003)
N. Karousis, J. Ortiz, K. Ohkubo, T. Hasobe, S. Fukuzumi, A. Sastre-Santos, N. Tagmatarchis, J. Phys. Chem. C. 116, 20564 (2012)
C. Fabris, G. Valduga, G. Miotto, L. Borsetto, G. Jori, S. Garbisa, E. Reddi, Cancer. Res. 61, 7495 (2001)
A. Santhi, V.V. Namboodiri, P. Radhakrishnan, V.P.N. Nampoori, J. Appl. Phys. 100, 053109 (2006)
A. de la Escosura, M.V. Martinez-Diaz, J. Barbera, T. Torres, J. Org. Chem. 73, 1475 (2008)
Y. Acikbas, M. Evyapan, T. Ceyhan, R. Capan, O. Bekaroglu, Sensor. Actuat. B-Chem. 123, 1017 (2007)
F.X. Gan, Chinese. Sci. Bull. 45, 572 (2000)
R.A. Collins, K.A. Mohammed, J. Phys. D. Appl. Phys. 21, 154 (1988)
K.M. Kadish, K.M. Smith, R. Guilard, Phthalocyanines properties and materials (Academic Press, Amsterdam, 2003)
J. Nahlik, I. Kasparkova, P. Fitl, Rev. Sci. Instrum. 83, 07470 (2012)
G. Maggioni, M.G. Manera, J. Spadavecchia, M. Tonezzer, S. Carturan, A. Quaranta, C.D.J. Fernandez, R. Rella, P. Siciliano, G. Della Mea, L. Vasanelli, P. Mazzoldi, Sensor. Actuat. B-Chem. 127, 150 (2007)
N. Matsumoto, H. Shima, T. Fujii, F. Kannari, Appl. Phys. Lett. 71, 2469 (1997)
E. Ina, N. Matsumoto, E. Shikada, F. Kannari, Appl. Surf. Sci. 127, 574 (1998)
M.K. Debe, J. Vac. Sci. Technol. A. 10, 2816 (1992)
M.K. Debe, D.R. Field, J. Vac. Sci. Technol. A. 9, 1265 (1991)
A.B. Djurisic, C.Y. Kwong, T.W. Lau, Z.T. Liu, H.S. Kwok, L.S.M. Lam, W.K. Chan, Appl. Opt. 42, 6382 (2003)
H.A. Macleod, Thin-Film Optical Filters, vol. 4 (Taylor & Francis, London, 2010)
S. Senthilarasu, R. Sathyamoorthy, S.K. Kulkarni, Mat. Sci. Eng. B-Solid. 122, 100 (2005)
A. Henriksson, M. Sundbom, Theor. Chim. Acta. 27, 213 (1972)
L. Edwards, M. Gouterma, J. Mol. Spectrosc. 33, 292 (1970)
M.M. El-Nahass, H.M. Zeyada, M.S. Aziz, N.A. El-Ghamaz, Opt. Mater. 27, 491 (2004)
H. Fujiwara, Spectroscopic Ellipsometry: Principles and Applications (Wiley, West Sussex, UK, 2007)
T. Tiwald, The Gaussian Oscillator. (J.A. WOOLLAM CO. INC., 2008), http://www.jawoollam.com/Newletters/TechNotes/gaussian_oscillator.pdf. Accessed 20 February 2014
V. Tkachenko, F.V. Di Girolamo, F. Chiarella, A. Cassinese, G. Abbate, Thin. Solid. Films. 520, 2390 (2012)
D. Yokoyama, A. Sakaguchi, M. Suzuki, C. Adachi, Appl. Phys. Lett. 93(17), 173302 (2008)
Z.T. Liu, H.S. Kwok, A.B. Djurisic, J. Phys. D. Appl. Phys. 37, 678 (2004)
J.S. Louis, D. Lehmann, M. Friedrich, D.R.T. Zahn, J. Appl. Phys. 101, 013503 (2007)
M.A. Barrett, Z. Borkowska, M.W. Humphreys, R. Parsons, Thin. Solid. Films. 28, 289 (1975)
E.A. Lucia, Fd Verderam, J. Chem. Phys. 48, 2674 (1968)
A.T. Davidson, J. Chem. Phys. 77, 168 (1982)
J.N. Hilfiker, N. Singh, T. Tiwald, D. Convey, S.M. Smith, J.H. Baker, H.G. Tompkins, Thin. Solid. Films. 516, 7979 (2008)
Acknowledgments
This work was supported by Czech Science Foundation (Project P108/11/1298) and Academy of Sciences of the Czech Republic (Project M100101271).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Novotny, M., Bulir, J., Bensalah-Ledoux, A. et al. Optical properties of zinc phthalocyanine thin films prepared by pulsed laser deposition. Appl. Phys. A 117, 377–381 (2014). https://doi.org/10.1007/s00339-014-8474-4
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00339-014-8474-4