Stability limiting heterointerfaces of perovskite photovoltaics

Substrates of ITO on glass were cleaned by successive ultrasonication in. . To obtain the spatial variation of the work function for each perovskite sample, we performed KPFM, which is an AFM-based technique to acquire work function information of th. . The STEM images and EDX maps were taken using a JEOL 2800 S/TEM equipped with dual 100-mm2silicon drift detectors at 200 kV with a probe size of 1 nm. To perform the STE. . All bulk and slab first-principles calculations were performed using density functional theory (DFT) in the plane-wave/pseudopotential approach implemented in t. . p-Toluenesulfonic acid monohydrate was first dehydrated to remove the water of crystallization. Using 100 ml toluene dissolves 1 g p-toluenesulfonic acid monohydrate in.