Journal Article10.1021/NL403997A
Low-temperature processed electron collection layers of graphene/TiO2 nanocomposites in thin film perovskite solar cells.
Jacob Tse-Wei Wang,James M. Ball,Eva M. Barea,Antonio Abate,Jack A. Alexander-Webber,Jian Huang,Michael Saliba,Iván Mora-Seró,Juan Bisquert,Henry J. Snaith,Robin J. Nicholas +10 more
TL;DR: A low-cost, solution-based deposition procedure utilizing nanocomposites of graphene and TiO2 nanoparticles as the electron collection layers in meso-superstructured perovskite solar cells shows the potential to contribute significantly toward the development of low- cost solar cells.
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Abstract: The highest efficiencies in solution-processable perovskite-based solar cells have been achieved using an electron collection layer that requires sintering at 500 °C. This is unfavorable for low-cost production, applications on plastic substrates, and multijunction device architectures. Here we report a low-cost, solution-based deposition procedure utilizing nanocomposites of graphene and TiO2 nanoparticles as the electron collection layers in meso-superstructured perovskite solar cells. The graphene nanoflakes provide superior charge-collection in the nanocomposites, enabling the entire device to be fabricated at temperatures no higher than 150 °C. These solar cells show remarkable photovoltaic performance with a power conversion efficiency up to 15.6%. This work demonstrates that graphene/metal oxide nanocomposites have the potential to contribute significantly toward the development of low-cost solar cells.
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Nanocarbons for mesoscopic perovskite solar cells
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