Perovskite Solar Cells: Alkali Chlorides for the Suppression of the Interfacial Recombination in Inverted Planar Perovskite Solar Cells (Adv. Energy Mater. 19/2019)

In article number 1803872, Aleksandra B. Djurišić, Zhubing He and co-workers report a promising inverted planar perovskite solar cell using NiO as the hole-transport-layer. Significant suppression of interfacial recombination is achieved by a facile alkali chloride modification at the interface between NiO and perovskite. This modification induces the ordering of the perovskite crystal and in turn decreases its defect/trap density, hence reducing interfacial recombination and augmenting the device open-circuit voltage significantly.