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Molecular Crystals and Liquid Crystals Volume 589, 2014 - Issue 1: Proceedings of the Ninth International Conference on Electronic Processes in Organic Materials (ICEPOM-9)
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ELECTRONIC PROCESSES IN ORGANIC MATERIALS: PHYSICS

Electro-Acoustic Effect in Organic Structure Based on Star-Shaped Carbazole Derivatives

Z. Hotra Lviv Polytechnic National University, S. Bandera 12, 79013, Lviv, Ukraine; Rzeszów University of Technology, W. Pola 2, Rzeszów, 35-959, Poland
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D. Volyniuk Lviv Polytechnic National University, S. Bandera 12, 79013, Lviv, Ukraine; Department of Organic Technology, Kaunas University of Technology, Radvilenu pl. 19, LT-50254, Kaunas, Lithuania
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V. Cherpak Lviv Polytechnic National University, S. Bandera 12, 79013, Lviv, Ukraine
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P. Stakhira Lviv Polytechnic National University, S. Bandera 12, 79013, Lviv, Ukraine
,
I. Grygorchak Lviv Polytechnic National University, S. Bandera 12, 79013, Lviv, Ukraine
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J. V. Grazulevicius Department of Organic Technology, Kaunas University of Technology, Radvilenu pl. 19, LT-50254, Kaunas, Lithuania
,
A. Michaleviciute Department of Organic Technology, Kaunas University of Technology, Radvilenu pl. 19, LT-50254, Kaunas, Lithuania
,
A. Tomkeviciene Department of Organic Technology, Kaunas University of Technology, Radvilenu pl. 19, LT-50254, Kaunas, Lithuania
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G. Barylo Lviv Polytechnic National University, S. Bandera 12, 79013, Lviv, Ukraine
,
N. Kus Lviv Polytechnic National University, S. Bandera 12, 79013, Lviv, Ukraine
&
M. Hladun European University - Lviv Branch, Kushevych Str., 7, Lviv, 79000, Ukraine
 show all
Pages 67-73 | Published online: 28 Mar 2014
 
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Abstract

We have found that the structures based on ITO/tri(9-hexylcarbazol-3-yl)amine/Ca/Al fabricated by means of vacuum deposition generate acoustic oscillations when pulse voltage is applied. Impedance spectroscopy study indicates the presence of significant inductive response, which is the result of significant energy barriers at the semiconductor-metal interface. We assume that a very heterogeneous spatial distribution of the electric field at the organic/metal interface and the noncoplanarity of the molecules cause the electrostriction effect in the structures.

Acknowledgments

This research was supported by FP7 REGPOT-2012-2013-1 ICT project CEOSeR (grant agreement No. 316010). It was also supported by the Lithuanian–Ukrainian Cooperation Programme in the Fields of Research and Technologies (project No. TAP LU 01/2012).

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