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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Acknowledgments
This research was financially supported by the Romanian Ministry of Education and Research through National Core Founding Program Contract No. 45 N/2009, Addendum 4/2013, ANCS STAR_ROSA Contract No.65/2013 and UEFISCDI ID-PCE Contract No. 148/2011.
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Stanculescu, A., Socol, G., Grigoras, M. et al. Laser prepared organic heterostructures based on star-shaped arylenevinylene compounds. Appl. Phys. A 117, 261–268 (2014). https://doi.org/10.1007/s00339-014-8521-1
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DOI: https://doi.org/10.1007/s00339-014-8521-1