Organic solar cells under the BHJ approach using conventional/inverted architectures

J. F. Salinas; C. Salto; J. L. Maldonado; G. Ramos-Ortíz; M. Rodríguez; M. A. Meneses-Nava; Oracio Barbosa-García; N. Farfán; R. Santillan

doi:10.1117/12.902295

2 November 2011 Organic solar cells under the BHJ approach using conventional/inverted architectures

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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Proceedings Volume 8011, 22nd Congress of the International Commission for Optics: Light for the Development of the World; 80117E (2011) https://doi.org/10.1117/12.902295
Event: International Commission for Optics (ICO 22), 2011, Puebla, Mexico

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.

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J. F. Salinas, C. Salto, J. L. Maldonado, G. Ramos-Ortíz, M. Rodríguez, M. A. Meneses-Nava, Oracio Barbosa-García, N. Farfán, and R. Santillan "Organic solar cells under the BHJ approach using conventional/inverted architectures", Proc. SPIE 8011, 22nd Congress of the International Commission for Optics: Light for the Development of the World, 80117E (2 November 2011); https://doi.org/10.1117/12.902295

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KEYWORDS

Silver

Metals

Copper

Solar cells

Organic photovoltaics

Polymers

Electrodes

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