S. Y. Leblebici, L. Leppert, Y. Li, S. E. Reyes-Lillo, S. Wickenburg, E. Wong, J. Lee, M. Melli, D. Ziegler, D. K. Angell, D. Frank Ogletree, P. D. Ashby, F. M. Toma, J. B. Neaton, I. D. Sharp, and A. Weber-Bargioni, "Facet-dependent photovoltaic efficiency variations in single grains of hybrid halide perovskite," Nat. Energy 1, 16093 (2016). Abstract