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Issue 2, 2016
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Carbon nanotube-based hybrid hole-transporting material and selective contact for high efficiency perovskite solar cells

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Abstract

We demonstrate a high efficiency perovskite solar cell with a hybrid hole-transporting material-counter electrode based on a thin single-walled carbon nanotube (SWCNT) film and a drop-cast 2,2,7,-7-tetrakis(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene (Spiro-OMeTAD) hole-transporting material (HTM). The average efficiency of the solar cells was 13.6%, with the record cell yielding 15.5% efficiency. The efficiency of the reference solar cells with spin-coated Spiro-OMeTAD hole-transporting materials (HTMs) and an evaporated gold counter electrode was 17.7% (record 18.8%), that of the cells with only a SWCNT counter electrode (CE) without additional HTM was 9.1% (record 11%) and that of the cells with gold deposited directly on the perovskite layer was 5% (record 6.3%). Our results show that it is possible to manufacture high efficiency perovskite solar cells with thin film (thickness less than 1 μm) completely carbon-based HTM-CEs using industrially upscalable manufacturing methods, such as press-transferred CEs and drop-cast HTMs.

Graphical abstract: Carbon nanotube-based hybrid hole-transporting material and selective contact for high efficiency perovskite solar cells

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Publication details

The article was received on 06 Nov 2015, accepted on 17 Dec 2015 and first published on 17 Dec 2015


Article type: Communication
DOI: 10.1039/C5EE03394B
Citation: Energy Environ. Sci., 2016,9, 461-466
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    Carbon nanotube-based hybrid hole-transporting material and selective contact for high efficiency perovskite solar cells

    K. Aitola, K. Sveinbjörnsson, J. Correa-Baena, A. Kaskela, A. Abate, Y. Tian, E. M. J. Johansson, M. Grätzel, E. I. Kauppinen, A. Hagfeldt and G. Boschloo, Energy Environ. Sci., 2016, 9, 461
    DOI: 10.1039/C5EE03394B

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