High efficiency all carbon-based perovskite solar cells

Henry Snaith^a, Jacob Tse-Wei Wang^a, Severin N. Habisreutinger ^a, Robin Nicholas^a, Gareth Jones ^b, Saverio Russo^b

^aDepartment of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom

^bSchool of Physics, University of Exeter, Stocker Road, Exeter, Devon EX4 4QL

International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics 2015 (HOPV15)

Roma, Italy, 2015 May 11th - 13th

Organizer: Filippo De Angelis

Poster, Jacob Tse-Wei Wang, 342
Publication date: 5th February 2015

Carbon, an indispensable element on earth, has been discovered with many types of allotropes in recent decades, including fullerene, nanotube, and graphene which have aroused high research interests. While in the past few years, a new class of light-absorbing material, organometal halide Perovskites has also emerged as a rising star opening a new chapter for the third generation solar cells. Firstly its gain in power conversion efficiency (PCE) is unprecedented, which has soared to 20% from 10% within three years. Secondly, its production cost compare to the mainstream Si-based solar cells is more cost-effective with its superiority on various low-temperature processing technique and cheaper raw materials. Here we demonstrate the possibility for combining these two materials and its application as solar cell with two different architectures, accordingly optimize the charge collection efficiency in the interface within devices, then show exceptional PCE up to 16%. With these combinations, we may push the carbon-perovskite solar cells into a better position to be the game changer among other types of solar cells.

1. Wang, Jacob Tse-Wei, et al. "Low-temperature processed electron collection layers of graphene/TiO2 nanocomposites in thin film perovskite solar cells." Nano letters 14.2 (2013): 724-730. 2. Habisreutinger, Severin N., et al. "Carbon nanotube/polymer composites as a highly stable hole collection layer in perovskite solar cells." Nano letters 14.10 (2014): 5561-5568.

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