Issue 2, 2016

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

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

Supplementary files

Article information

Article type
Communication
Submitted
06 Nov 2015
Accepted
17 Dec 2015
First published
17 Dec 2015

Energy Environ. Sci., 2016,9, 461-466

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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