2-Methoxyethanol as a new solvent for processing methylammonium lead halide perovskite solar cells

K.H. Hendriks, J.J. van Franeker, B.J. Bruijnaers, J.A. Anta, M.M. Wienk, R.A.J. Janssen

Research output: Contribution to journalArticleAcademicpeer-review

44 Citations (Scopus)
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Abstract

Methylammonium lead halide perovskites used in photovoltaic devices are generally deposited from high boiling point solvents with low volatility such as N,N-dimethylformamide. The slow drying causes the formation of relatively large perovskite crystallites that enhance surface roughness and lead to pin holes between the crystallites. We show that the use of 2-methoxyethanol, which is a more volatile solvent, results in smaller crystals that still span the entire layer thickness. This improves the surface coverage of perovskite films, reduces the leakage current and increases the open-circuit voltage and fill factor of solar cells. P-I-N configuration solar cells, processed under ambient conditions from a triple anion (iodide, chloride, and acetate) lead precursor salt, provide an increase in the power conversion efficiency from 14.1% to 15.3% when N,N-dimethylformamide is replaced by 2-methoxyethanol as the solvent.

Original languageEnglish
Pages (from-to)2346-2354
Number of pages9
JournalJournal of Materials Chemistry A
Volume5
Issue number5
DOIs
Publication statusPublished - 7 Feb 2017

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