TiO2 composite electron transport layers for planar perovskite solar cells by mixed spray pyrolysis with precursor solution incorporating TiO2 nanoparticles
(color online) PL spectra of bare CH3NH3PbI3 layers (reference), and PL spectra of CH3NH3PbI3 layers on TiO2 layers without (W/O NPs) and with incorporation of 25 nm (25 nm NPs), 60 nm (60 nm NPs), and 100 nm (100 nm NPs) nanoparticles.
