Electrodeposition of Photosensitive Layers Based on Conducting Polymers and Zinc Phthalocyaninate, Their Structure and Photoelectrical Properties

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Abstract

Photosensitive hybrid layers were obtained by electrochemical polymerization of pyrrole and 3,4-ethylenedioxythiophene (EDOT) in the presence of water-soluble sodium salt of zinc octa(3ʹ,5ʹ-dicarboxyphenoxy)phthalocyaninate (ZnPc) containing 16 ionogenic carboxylate groups. It was found that the process of electrodeposition of hybrid layers most effectively occurs in galvanostatic and potentiostatic modes on the sublayer of the PEDOT-polyacid complex. The electronic and chemical structure and morphology of hybrid layers of polypyrrole (PPy) obtained in the presence of ZnPc were studied. Possible reasons are considered that the measured values of photosensitivity and external quantum yield of charge carrier generation in PPy-ZnPc are several times higher than in PEDOT-ZnPc.

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O. L. Gribkova

A.N. Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences

Author for correspondence.
Email: oxgribkova@gmail.com
Russian Federation, Moscow

V. A. Kabanova

A.N. Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences

Email: oxgribkova@gmail.com
Russian Federation, Moscow

I. D. Kormshchikov

Lomonosov Moscow State University

Email: oxgribkova@gmail.com
Russian Federation, Moscow

A. R. Tameev

A.N. Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences

Email: oxgribkova@gmail.com
Russian Federation, Moscow

A. A. Nekrasov

A.N. Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences

Email: secp@elchem.ac.ru
Russian Federation, Moscow

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Supplementary files

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2. Fig. 1. Structure of zinc phthalocyaninate used in the work

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3. Fig. 2. Cyclic voltammetry during the attempt of PPy layer deposition from aqueous solution of 0.01M pyrrole and 0.0025 M ZnPc on FTO electrode: without sublayer (a); with PPy-PAMPSNa sublayer (b); with PEDOT-PAMPSNa sublayer (c)

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4. Fig. 3. Dynamics of change of current (I), charge (Q) and optical absorption spectra (A) during PS deposition of PPy-ZnPc layer from aqueous solution of 0.01 M pyrrole and 0.0025 M ZnPc on FTO electrode: (a) without sublayer (Epoly = 1.0 V); (b) with PPy-PAMPSNa sublayer (Epoly = 0. 8 V); (c) spectra (inset: change of absorbance at 750 nm depending on the charge used for Py electropolymerisation) during synthesis on the sublayer (numbers in the legend - time, s, from the beginning of synthesis)

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5. Fig. 4. Dynamics of change in current (I), charge (Q), potential (E) and optical absorption spectra (A) during PS (a, c), Epoly = 0.85 V and GS (b, d), current density 0.09 mA/cm2 deposition of PPy-ZnPc layer from aqueous solution of 0.01 M pyrrole and 0.0025 M ZnPc on FTO electrode with PEDOT-PAMPSNa sublayer. In the spectra (c, d) the figures in the legend are the time, s, from the beginning of synthesis; in the insets are the change in absorbance at 750 nm as a function of the charge consumed for the electropolymerisation of Py

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6. Fig. 5. AFM images and cross-sectional profiles along white lines of PPy-ZnPc samples obtained by potentiostatic polymerisation on PPy-PAMPSNa (a) and PEDOT-PAMPSNa (b) sublayers

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7. Fig. 6. Absorption spectra of layers electrodeposited on FTO electrode: 1 - PPy-ZnPc on PEDOT-PAMPSNa sublayer; 2 - PPy-PAMPSNa; 3 - PEDOT-PAMPSNa sublayer

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8. Fig. 7. Normalised (band intensity 986 cm-1) CR spectra under 632 nm laser excitation of samples electrodeposited on FTO-glass substrates: 1 - PPy-ZnPc on PPy-PAMPSNa sublayer; 2 - PPy-PAMPSNa. For comparison: 3 - arbitrarily normalised spectrum of the ZnPc layer deposited by solution watering on glass

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9. Fig. 8. Normalised (991 cm-1 band intensity) CR spectra of samples electrodeposited on FTO-glass substrates under 632 nm laser excitation: 1 - PPy-ZnPc on PEDOT-PAMPSNa sublayer; 2 - PEDOT-PAMPSNa. For comparison: 3 - arbitrarily normalised CR spectrum of the ZnPc layer deposited by solution watering on glass

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