Fig. 1: Surface hydroxylation pretreatment of NiOx NPs.
From: In situ coordinated HTL strategy for high-performance and scalable perovskite solar cells
a Synthesis of H–NiOx and integrated 2PACz–NiOx NPs. b, c TEM images of C–NiOx and H–NiOx NPs. d Size distribution of C–NiOx and H–NiOx NPs. e Adsorption energy of –NO3 and –OH on NiOx NPs. f, g XPS spectra of Ni 2p core levels for C–NiOx and H–NiOx films.
