Browsing by Author "Bernede, J. C."
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- ItemElectrochemical deposition of polycarbazole thin films onto tin oxide coated glass: Physicochemical and optoelectronic characterizations(2007) Yapi Abe, S.; Bernede, J. C.; Ugalde Meza, Lastenia; Tregouet, Y.; Valle Delaware la Cortina, María Angélica del
- ItemInfluence of the electrochemical conditions on the properties of polymerized carbazole(2001) Taoudi, H.; Bernede, J. C.; Valle de la Cortina, María Angélica del; Bonnet, A.; Morsli, M.
- ItemInfluence of the exciton blocking layer on the stability of layered organic solar cells(2011) Lare, Y.; Kouskoussa, B.; Benchouk, K.; Ouro Djobo, S.; Cattin, L.; Morsli, M.; Díaz Alzamora, Fernando Raúl; Gacitúa Santelices, Manuel Alejandro; Abachi, T.; Valle de la Cortina, María Angélica del; Armijo, F.; East, Gaston A.; Bernede, J. C.
- ItemNew 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).
- ItemOn the use of multiple stacked active layers in organic photovoltaic cells(2020) Cattin, L.; El Jouad, Z.; Siad, M. B.; Morsli, M.; Arzel, L.; Ortega, E.; Louarn, G.; Neculqueo, G.; Lamkaouane, H.; Khelil, A.; Addou, M.; Valle Delaware la Cortina, María Angélica del; Mir, F.; Bernede, J. C.
- ItemRelationship between photo-physical and electrochemical properties of D--A compounds regarding solar cell applications. 1. Substituent type effect in photovoltaic performance(2019) Ortega Cancino, Eduardo Antonio; Bernede, J. C.; Ramírez, A. M. R.; Louarn, G.; Díaz Alzamora, Fernando Raúl; Cattin, L.; Valle de la Cortina, María Angélica del
- ItemStudy of the effect of acid doping on the properties of poly(N-seleno-p-phenylene diamine)(1997) Bernede, J. C.; Godoy, A.; Molinie, P.; Díaz Alzamora, Fernando Raúl; Roquand, N.; Tregouet, Y.; Valle Delaware la Cortina, María Angélica del
- ItemSynthesis of 2H-benzotriazole based donor-acceptor polymers bearing carbazole derivative as pendant groups: Optical, electronical and photovoltaic properties(2016) Jessop Rivera, Ignacio; Bustos, M.; Hidalgo, D.; Terraza Inostroza, Claudio; Tundidor Camba, Alain; Pardo, M. A.; Fuentealba Patiño, Denis Alberto; Hssein, M.; Bernede, J. C.
- ItemSYNTHESIS 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.
- ItemSynthesis, characterization and photo physical-theoretical analysis of D-pi-A compounds. 2. Chain length effect through even-odd effect on the photophysical properties.(2017) Ortega, E.; Ramírez, A.; Cattin, L.; Díaz. F. R.; Valle de la Cortina, María Angélica del; Bernede, J. C.; Ortega, E.; Ramírez, A.; Cattin, L.; Díaz. F. R.; Valle Delaware la Cortina, María Angélica del; Bernede, J. C.
- ItemSynthesis, characterization and photophysical-theoretical analysis of compounds A-pi-D. 1. Effect of alkyl-phenyl substituted amines in photophysical properties.(2017) Ortega, E.; Montecinos Escobar, Rodrigo Andrés; Cattin, L.; Díaz, F. R.; Valle de la Cortina, María Angélica del; Bernede, J. C.
- ItemZnO thin films fabricated by chemical bath deposition, used as buffer layer in organic solar cells(ELSEVIER SCIENCE BV, 2009) Lare, Y.; Godoy, A.; Cattin, L.; Jondo, K.; Abachi, T.; Diaz, F. R.; Morsli, M.; Napo, K.; del Valle, M. A.; Bernede, J. C.ZnO thin films synthetized by chemical bath deposition are used as buffer layer between the anode and the organic electron donor in organic solar cells. Films deposited from zinc nitrate solutions are annealed in room air at 300 degrees C for half an hour. The X-ray diffraction and microanalysis studies show that ZnO polycrystalline thin films are obtained. The solar cells used are based on the couple copper phthalocyanine as electron donor and (N, N-diheptyl-3,4,9,10-perylenetetracarboxylicdiimide-PTCDI-C7) as electron acceptor. It is shown that the presence of the ZnO buffer layer improves the energy conversion efficiency of the cells. Such improvement could be attributed to a better energy level alignment at the anode/electron donor interface. The anode roughness induced by the ZnO buffer layer can also transform the planar interface organic electron donor/electron acceptor into roughen topography. This increases the interface area, where carrier separation takes place, which improves solar cells performances. (C) 2009 Elsevier B. V. All rights reserved.