Low-temperature processed electron collection layers of graphene/TiO2 nanocomposites in thin film perovskite solar cells.

By Jacob Tse-Wei Wang, J. Ball, E. M. Barea, A. Abate, J. Alexander-Webber, Jian Huang, Michael Saliba, I. Mora‐Seró, Juan Bisquert, H. Snaith and 1 more. Nano letters (Print), 2013

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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.

Subfields: Electrical and Electronic Engineering, Materials Chemistry, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/69e3bef6d93d31b7695d7c1a972e2947d4876d89

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Low-temperature processed electron collection layers of graphene/TiO2 nanocomposites in thin film perovskite solar cells.

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