N-type polymers as electron extraction layers in hybrid perovskite solar cells with improved ambient stability

S. Shao; Z. Chen; H.-H. Fang; G. H. ten Brink; D. Bartesaghi; S. Adjokatse; L. J. A. Koster; B. J. Kooi; A. Facchetti; M. A. Loi

doi:10.1039/C5TA10696F

N-type polymers as electron extraction layers in hybrid perovskite solar cells with improved ambient stability†

S. Shao,^a Z. Chen,^b H.-H. Fang,

^a G. H. ten Brink,^a D. Bartesaghi,^a S. Adjokatse,^a L. J. A. Koster,^a B. J. Kooi,^a A. Facchetti^b and M. A. Loi*^a

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^a Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, Groningen, The Netherlands
E-mail: m.a.loi@rug.nl

^b Polyera Corporation, 8045 Lamon Avenue, Skokie, Illinois 60077, USA

Abstract

We studied three n-type polymers of the naphthalenediimide-bithiophene family as electron extraction layers (EELs) in hybrid perovskite solar cells. The recombination mechanism in these devices is found to be heavily influenced by the EEL transport properties. The maximum efficiency of the devices using the n-type polymers EELs did not exceed substantially that of the devices using PC₆₀BM (about 11%), while a substantial improvement in their ambient stability (87% of the initial value after 270 minutes) compared to that using PC₆₀BM (3.5% of the initial value after 270 minutes) was detected.

This article is part of the themed collection: Celebrating Excellence in Research: Women of Materials Science

Journal of Materials Chemistry A

N-type polymers as electron extraction layers in hybrid perovskite solar cells with improved ambient stability†

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N-type polymers as electron extraction layers in hybrid perovskite solar cells with improved ambient stability

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