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SOLUBLE PHTHALOCYANINES – NEW MATERIALS FOR OPTOELECTRONICS

M. Biler1, I. Zhivkov2, J. Rakušan3, M. Karásková3, S. Pochekailov4, G. Wang4, S. Nešpurek4,5,*

Affiliation

  1. AVX Czech Republic, L. t. d., Dvoákova 328, 56 301 Lanškroun, Czech Republic
  2. Central Laboratory of Photoprocesses, Bulgarian Academy of Sciences, G. Bonchev Str., 1040 Sofia, Bulgaria
  3. Research Institute for Organic Syntheses, 532 18 Pardubice-Rybitví, Czech Republic
  4. Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
  5. Faculty of Chemistry, Brno University of Technology, Purkyova 118, 612 00 Brno, Czech Republic

Abstract

A new class of soluble phthalocyanines was synthesized and their electrical properties were studied. Their UV-VIS spectra consist of two strong Q and Soret bands at about 650 – 800 and 300 – 400 nm, respectively, showing an enhanced broad optical window with lower linear absorption at about 500 nm. The energy of the long-wavelength absorption is in good agreement with activation energy of dark conductivity; thus, the band gap energy can be estimated as 1.7 eV. The phthalocyanines under study are salts, and hence, due to the dissociation of ionic groups, the electrical conductivity is strongly dependent on the air humidity. This effect can be utilized for the construction of humidity sensors. Because of quite a high charge carrier mobility, of the order 10-3 cm2 V-1 s-1, the phthalocyanines were used for the construction of field-effect transistors..

Keywords

Phthalocyanine, Poly[3,4-(ethylenedioxy)thiophene], Electrical properties.

Submitted at: April 19, 2005
Accepted at: May 26, 2005

Citation

M. Biler, I. Zhivkov, J. Rakušan, M. Karásková, S. Pochekailov, G. Wang, S. Nešpurek, SOLUBLE PHTHALOCYANINES – NEW MATERIALS FOR OPTOELECTRONICS, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 3, pp. 1365-1370 (2005)