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Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
Published: February 2014
AI Article Synopsis
The study introduces a new method for creating solar cells using a graphene and TiO2 nanoparticle combination as the electron collection layer, allowing for lower-temperature production at 150 °C instead of 500 °C.
This innovation makes it feasible to produce solar cells on plastic substrates and supports multijunction device designs, expanding their application potential.
The resulting solar cells achieved impressive power conversion efficiency rates of up to 15.6%, indicating that this approach could lead to cost-effective solar cell production.
Article 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.
