Staggering increases in the performance of organic–inorganic perovskite solar cells have renewed the interest in these materials. However, further developments and the support from academic and industrial partners will hinge on the reporting of accurate efficiency values.

http://www.nature.com/nmat/journal/v13/n9/full/nmat4079.html

Nature Materials 13, 837 (2014) doi:10.1038/nmat4079