Electron transport layer assisted by nickel chloride hexahydrate for open-circuit voltage improvement in MAPbI₃ perovskite solar cells

Abstract

Nickel chloride hexahydrate (NiCl2·6H2O) was introduced into the SnO2 ETL, which significantly increased open-circuit voltage (VOC) and power conversion efficiency (PCE)

Exploration and Optimization of the Polymer-Modified NiOx Hole Transport Layer for Fabricating Inverted Perovskite Solar Cells

“…It is seen that the perovskite coated on the p-NiO x /o-NiO x structure possessed the fastest PL decay curve compared with other NiO x films, implying that the hole–electron separation was accomplished more effectively [ 17 ]. The TR-PL decay curves were fitted using a biexponential model; the fast decay constant τ 1 and slow decay constant τ 2 represent the surface recombination and charge recombination in the perovskite bulk, respectively [ 50 , 51 ]. Then, the average carrier lifetime (τ avg ) was estimated from the equation = , where A i and τ i were deduced from the data of the fitted curve [ 52 , 53 , 54 ].…”