A low cost azomethine-based hole transporting material for perovskite photovoltaics

Petrus, M.L., Bein, T., Dingemans, T.J. and Docampo, P. (2015) A low cost azomethine-based hole transporting material for perovskite photovoltaics. Journal of Materials Chemistry A, 3(23), pp. 12159-12162. (doi: 10.1039/C5TA03046C)

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Most hole transporting materials (HTMs) prepared for perovskite solar cell applications are synthesized via cross-coupling reactions that require expensive transition metal catalysts, inert reaction conditions and extensive product purification; making large-scale production cost-prohibitive. Here, we describe the synthesis of a simple azomethine-based conjugated small-molecule (EDOT-OMeTPA) which is easily prepared in a cost effective Schiff base condensation reaction, with water being the only by-product. As the hole transporter in planar CH3NH3PbI3 perovskite solar cells, efficiencies exceeding 11% were reached. This result is comparable to state-of-the-art materials such as Spiro-OMeTAD on a like-to-like comparison, while cost estimations show that the material cost is about one order of magnitude lower for EDOT-OMeTPA, resulting in a negligible cost-per-peak-Watt contribution of 0.004 $ W−1. In addition, the high synthetic accessibility of EDOT-OMeTPA also reduces the toxic chemical waste and therefore greatly reduces its environmental impact. Our results pave the way towards low-cost, environmentally friendly and efficient HTMs.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Docampo, Dr Pablo
Authors: Petrus, M.L., Bein, T., Dingemans, T.J., and Docampo, P.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Journal of Materials Chemistry A
Publisher:Royal Society of Chemistry
ISSN (Online):2050-7496
Published Online:11 May 2015
Copyright Holders:Copyright © 2015 The Royal Society of Chemistry
First Published:First published inJournal of Materials Chemistry A 3(23): 12159-12162
Publisher Policy:Reproduced under a Creative Commons License

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