The rise of metal halide perovskites as light harvesters has stunned the photovoltaic community. As the efficiency race continues, questions on the control of the performance of perovskite solar cells and on its characterization are being addressed.

http://www.nature.com/nmat/journal/v13/n9/full/nmat4065.html

Nature Materials 13, 838–842 (2014) doi:10.1038/nmat4065