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Proceedings Paper

Organic solar cells under the BHJ approach using conventional/inverted architectures
Author(s): J. F. Salinas; C. Salto; J. L. Maldonado; G. Ramos-Ortíz; M. Rodríguez; M. A. Meneses-Nava; Oracio Barbosa-García; N. Farfán; R. Santillan
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Paper Abstract

The search of clean and renewable energy sources is one of the most important challenges that mankind confronts. Recently there has been a notable interest to develop organic photovoltaic (OPV) technology as a mean of renewable energy source since it combines low-cost and easy fabrication. Most of the efforts have been directed to increase the efficiency, leaving aside the durability of the organic materials, however, a new architecture known as inverted solar cell might bring a never seen durability (years) that could make possible large scale applications of this technology. Here are presented the results we achieved using both, the conventional and inverted architectures employing as organic donor (D) the very well known semi-conducting polymer P3HT, in mixtures with the acceptor (A) fullerene PC61BM. The morphology of thin polymer films prepared by using the spin coating technique was analyzed by AFM. For the conventional architecture the cells were fabricated following the structure ITO/PEDOT:PSS/P3HT:PC61BM/Wood´s metal, where the Wood´s metal cathode is an alloy that melts at 75 °C. For the inverted architecture the structure ITO/ZnO/P3HT:PC61BM /PEDOT:PSS/(Ag, Cu or Silver paint) was used, where ITO worked as cathode by switching its work function through the introduction of ZnO nanoparticles. Under tests using Xenon lamp irradiation at 100 mW/cm2, the conventional and the inverted architectures produced efficiencies of 1.75 % and 0.5 %, respectively. For both architectures the chosen back-contact materials (Wood´s metal and silver paint) allowed us to easily make the OPVs cells without the need of vacuum steps.

Paper Details

Date Published: 3 November 2011
PDF: 6 pages
Proc. SPIE 8011, 22nd Congress of the International Commission for Optics: Light for the Development of the World, 80117E (3 November 2011); doi: 10.1117/12.902295
Show Author Affiliations
J. F. Salinas, Ctr. de Investigaciones en Óptica, A.C. (Mexico)
C. Salto, Ctr. de Investigaciones en Óptica, A.C. (Mexico)
J. L. Maldonado, Ctr. de Investigaciones en Óptica, A.C. (Mexico)
G. Ramos-Ortíz, Ctr. de Investigaciones en Óptica, A.C. (Mexico)
M. Rodríguez, Ctr. de Investigaciones en Óptica, A.C. (Mexico)
M. A. Meneses-Nava, Ctr. de Investigaciones en Óptica, A.C. (Mexico)
Oracio Barbosa-García, Ctr. de Investigaciones en Óptica, A.C. (Mexico)
N. Farfán, Univ. Nacional Autónoma de México (Mexico)
R. Santillan, Ctr. de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (Mexico)


Published in SPIE Proceedings Vol. 8011:
22nd Congress of the International Commission for Optics: Light for the Development of the World
Ramón Rodríguez-Vera; Ramón Rodríguez-Vera; Ramón Rodríguez-Vera; Rufino Díaz-Uribe; Rufino Díaz-Uribe; Rufino Díaz-Uribe, Editor(s)

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