  With the rapid progress of perovskite photovoltaics (PV), further challenges
arise to meet meet the minimum standards required for commercial deployment.
Along with the push towards higher efficiencies, we identify a need to improve
the quality and uniformity of reported research data and to focus efforts upon
understanding and overcoming failures during operation. In this perspective, as
a large and representative consortium of researchers active in this field, we
discuss which methods require special attention and issue a series of
recommendations to improve research practices and reporting.
