Huckaba, Aron J.Garcia-Benito, InesKanda, HiroyukiShibayama, NaoyukiOveisi, EmadNazeeruddin, Mohammad K.2020-05-202020-05-202020-05-202020-05-0710.1002/hlca.202000044https://infoscience.epfl.ch/handle/20.500.14299/168830WOS:000530731400001Perovskite solar cells have garnered and held international research interest, due to ever-climbing power conversion efficiency values, now >25 %. Some high efficiency configurations utilize a compact TiO2 layer underneath a mesoporous TiO2 layer, both of which require high temperature annealing steps that could hinder perovskite commercialization. To address the high thermal budget, we chose to use inkjet-printing to combine the two layers into a single TiO2 film, which incorporates both nanoparticle and molecular precursor as well as organic fullerene additives. We printed the ink on fluorine-doped tin oxide, and after annealing at various temperatures, we found that 400 degrees C was the optimum annealing temperature for the inkjet-printed electron transport layers, which is significantly lower than the 500 degrees C required to anneal typical mesoporous TiO2 films.Chemistry, MultidisciplinaryChemistryperovskite solar cellsinkjet printingcomposite transport layersolar cellsnanoparticlesfullerenestio2stabilitytext::journal::journal article::research article