Browsing by Author "Jessop, I. A."

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    New Polymers Based on 2,6-di(thiophen-2-yl) aniline and 2,2 '-(thiophen-2,5-diyl) dianiline Monomers. Preparation, Characterization and Thermal, Optical, Electronic and Photovoltaic Properties
    (ESG, 2012) Jessop, I. A.; Zamora, P. P.; Diaz, F. R.; del Valle, M. A.; Leiva, A.; Cattin, L.; Makha, M.; Bernede, J. C.
    A new series of polymers, chemically and electrochemically obtained from monomers containing aniline and thiophene moieties, has been prepared. The purpose is to use them as electron donor layers in the fabrication of dual-layer organic solar cells. Both the monomers and the polymers were characterized using techniques such as NMR, FT-IR, cyclic voltammetry, etc. It was found that polymer growth occurred only through aniline unit(s) and not through thiophene unit(s), as might also be expected. Optical and electronic studies revealed that the products displayed properties suitable for use in photovoltaic devices. However, prepared prototypes yields ranged just between 10(-2) and 10(-3).
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    SYNTHESIS OF RANDOM COPOLYMERS OF 2,6-DI(THIOPHEN-2-YL)ANILINE AND 2,2′-(THIOPHEN-2,5-DIYL)DIANILINE WITH ANILINE AND ITS EVALUATION IN ORGANIC SOLAR CELLS
    (2014) Jessop, I. A.; Zamora, P. P.; Diaz, F. R.; Del Valle, M. A.; Bernede, J. C.
    The present work deals with copolymers synthesized by reacting aniline units or blocks with 2,6-di(thiophen-2-yl)aniline and 2,2'-(thiophen-2,5-diyl)dianiline monomers. Characterization by spectroscopic techniques such as FT-IR, UV-vis, 1H-NMR corroborated the formation of true copolymers. Synthesized products showed improved solubility and better photovoltaic efficiency than the respective homopolymers. The latter is due to the presence of a greater number of quinoid units, capable of promoting charge carriers generation. However, the low mobility of the charge carriers, that increases copolymers resistivity, would be responsible for an efficiency improvement of just one order of magnitude with respect to the homopolymers.