Inkjet-Printed TiO2/Fullerene Composite Films for Planar Perovskite Solar Cells |
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| Authors: | Aron J Huckaba Inés Garcia-Benito Hiroyuki Kanda Naoyuki Shibayama Emad Oveisi Sachin Kinge Mohammad K Nazeeruddin |
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| Institution: | 1. Institute of Chemical Sciences and Engineering, EPFL, Valais-Wallis, Rue de l'industrie 17, CH-1951 Sion, Switzerland;2. Department of General Systems Studies, Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo, 153-8902 Japan;3. Interdisciplinary Centre for Electron Microscopy (CIME), EPFL, CH-, 1015 Lausanne, Switzerland;4. Toyota Motor Corporation, Toyota Motor Technical Centre, Advanced Technology Div., Hoge Wei 33,, B-1930 Zaventum, Belgium |
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| Abstract: | Perovskite 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 °C was the optimum annealing temperature for the inkjet-printed electron transport layers, which is significantly lower than the 500 °C required to anneal typical mesoporous TiO2 films. |
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| Keywords: | perovskite solar cells inkjet printing composite transport layer solar cells nanoparticles fullerenes |
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