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Laser prepared organic heterostructures based on star-shaped arylenevinylene compounds |
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| Authors: | A. Stanculescu G. Socol M. Grigoras T. Ivan L. Vacareanu M. Socol O. Rasoga C. Breazu I. N. Mihailescu I. Iordache N. Preda F. Stanculescu |
| Affiliation: | 1. National Institute of Materials Physics, 105 bis Atomistilor Street, P.O. Box MG-7, 077125, Bucharest, Magurele, Romania 2. National Institute for Laser, Plasma and Radiation Physics, PO Box MG-36, 077125, Bucharest, Magurele, Romania 3. P. Poni Institute of Macromolecular Chemistry, 41 A Gr. Ghica Voda Alley, 700487, Iasi, Romania 4. Faculty of Physics, University of Bucharest, 405 Atomistilor Street, P.O. Box MG-11, 077125, Bucharest, Magurele, Romania |
| Abstract: | This paper presents some studies about the preparation by matrix-assisted pulsed laser evaporation (MAPLE) technique of organic bulk heterojunctions made from the mixture of a star-shaped arylenevinylene compound, 4,4′,4″-tris[(4′-diphenylamino)styryl] triphenylamine as donor and fullerene derivative, [6, 6]-phenyl C61 butyric acid butyl ester, as acceptor, in the weight ratio 1:2. The mixed layer has been characterized by spectroscopic (UV–Vis, Fourier transform infrared) and microscopic (AFM) methods, and the effects of the deposition conditions (number of pulses) and of a buffer layer of poly(aniline-co-aniline propane sulfonic acid) or poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) have been analyzed. The study of the electrical properties has revealed a typical solar cell behavior for the heterostructure glass/ITO/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)/4,4′,4″-tris[(4′-diphenylamino)styryl] triphenylamine: [6, 6]-phenyl C61 butyric acid butyl ester/Al, confirming that MAPLE could be an adequate method for the preparation of active layer based on bulk heterojunction for solar cells. |
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