Konrad Domanski

TL;DR: In this paper, the authors investigated the stability of state-of-the-art perovskite solar cells (PSCs) with efficiencies exceeding 20% and found that exposing PSCs to a temperature of 70 °C is enough to induce gold migration through the hole-transporting layer (HTL), spiro-MeOTAD, and into the perovsite material, which in turn severely affects the device performance metrics under working conditions.

Abstract: and co-workers report a method to obtain a compact perovskite layer with larger grains, aiming for high performance perovskite solar cells with 19.5% power conversion efficiency. The image shows the mechanism of controlling perovskite crystal growth with ionic liquid, methylammonium formate (MAF). MAF can selectively interact with Pb, which can retard PbI2-methylammonium iodide (MAI) interaction to form perovskite. SOLAR CELLS

TL;DR: In this article, the authors investigated the recombination at different interfaces in a perovskite solar cells, including the charge selective contacts and the effect of grain boundaries, and showed that a further suppression of non-radiative recombination is possible for an all-low-temperature PSC, to yield a very low loss-in-potential similar to GaAs, and thus paving the way towards higher than 22% efficiencies.

TL;DR: In this article, the ionic liquid driven crystallization was exploited to produce a planar perovskite solar cell with a stabilized power output of 19.5% for the first time.