Journal of the American Ceramic Society, Volume 97, Issue 6, pages 1837–1840, June 2014.
Joyprokash Chakrabartty1,*, Riad Nechache1,2, Shun Li1, Mischa Nicklaus1,Andreaus Ruediger1 , Federico Rosei1,3
1. Institut National de la Recherche Scientifique, Énergie, Matériaux et Télécommunications, INRS, Varennes, Québec, Canada and
2. NAST Center & Department of Chemical Science and Technology, University of Rome, Rome, Italy and
3. Centre for Self-Assembled Chemical Structures (CSACS), McGill University, Montreal, Canada
We report a power conversion efficiency of ~0.01% in multistacking of BiFeO3/BiCrO3 bilayer thin films used as active layers in a photovoltaic (PV) device. The films were epitaxially deposited by pulse laser deposition onto (100) oriented CaRuO3-coated LaAlO3substrates and were subsequently illuminated with 1 sun (AM 1.5). The fill factor is determined to be 0.31%, a remarkable value for ferroelectric- and multiferroic based PV devices. Our results demonstrate that photocurrent density and photovoltage can be tuned by varying the thickness and number of respective bilayers in the improvement of PV properties of multiferroic heterostructures. The maximum photocurrent is generated at an optimal multilayer thickness of 60 nm, with its origin being mainly ascribed to the contribution of ferroelectric polarization.
© 2014 The American Ceramic Society.