Organic photovoltaic cells with controlled polarization sensitivity

Abstract: In this study, we demonstrate linearly polarized organic photovoltaic cells with a well-controlled level of polarization sensitivity. The polarized devices were created through the application of a large uniaxial strain to the bulk heterojunction poly(3-hexylthiophene):Phenyl-C61-butyric acid methyl ester (P3HT:PCBM) film and printing the plastically deformed active layer onto a PEDOT:PSS and indium tin oxide coated glass substrate. The P3HT:PCBM layer is processed such that it is able to accommodate high strains (over 100%) without fracture. After printing the strained films, thermal annealing is used to optimize solar cell performance while maintaining polarization sensitivity. A dichroic ratio and short circuit current ratio of 6.1 and 1.6 were achieved, respectively.

O. Awartani, M. W. Kudenov, and B. T. O’Connor, “Organic photovoltaic cells with controlled polarization sensitivity,” Applied Physics Letters 104, 093306 (2014).