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Study of Hole-Transporter-Free Perovskite Solar Cells based on Fully Printable Components

1
Department of Materials Science and Nanotechnology, School of Science and Engineering, Sharif University of Technology, International Campus-Kish Island, Kish Island 79417-76655, Iran
2
Department of Chemical Engineering, University of Patras, 26500 Patras, Greece
3
Department of Materials Science and Engineering, Sharif University of Technology, Tehran 14588-89694, Iran
*
Authors to whom correspondence should be addressed.
Micromachines 2019, 10(4), 266; https://doi.org/10.3390/mi10040266
Received: 21 March 2019 / Revised: 18 April 2019 / Accepted: 18 April 2019 / Published: 20 April 2019
(This article belongs to the Special Issue Organic Electronic Devices)
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Abstract

Hole-transporter-free perovskite solar cells carrying a carbon back contact electrode provide the possibility of making full printable low cost and stable devices, even though their efficiency is substantially lower than those made in the standard configuration. The present work searched for simple and easy routes for constructing such devices, demonstrating that organic components do enhance device efficiency but only to a level that is not worth the trouble nor the cost. Devices based on a triple mesoporous layer of titania/zirconia/carbon with perovskite infiltration gave an efficiency of 10.7%. After 180 days of storing under ambient conditions, a small loss of efficiency has been observed for a cell made in June, in spite of the fact that in going from June to December, a large increase of the ambient humidity took place, thus verifying the protective effect that the carbon electrode is providing. The addition of spiro-OMeTAD to the hole-transporter-free device resulted in increasing the efficiency by about 10%, a change which is appreciated to be of low importance given the cost of this material. This increase mainly derived from an increase in the current. Devices of different sizes have been constructed by screen printing, using home-made pastes for all the components making the cell scaffold, i.e., for titania, zirconia, and carbon layers. View Full-Text
Keywords: perovskite solar cells; hole-transporter free; fully-printable components perovskite solar cells; hole-transporter free; fully-printable components
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Raminafshar, C.; Raptis, D.; Mohammadi, M.R.; Lianos, P. Study of Hole-Transporter-Free Perovskite Solar Cells based on Fully Printable Components. Micromachines 2019, 10, 266.

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