Home PV Manufacturing A Low Viscosity, Low Boiling Point, Clean Solvent System for the Rapid Crystallisation of Highly Specular Perovskite Films
A Low Viscosity, Low Boiling Point, Clean Solvent System for the Rapid Crystallisation of Highly Specular Perovskite Films

A Low Viscosity, Low Boiling Point, Clean Solvent System for the Rapid Crystallisation of Highly Specular Perovskite Films

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The acetonitrile/methylamine (ACN/MA) composite solvent can be prepared through various routes. In this work, we have two different methods of introducing the methylamine into the ACN. For thin film and device studies, a solution of MA in ethanol (Sigma Aldrich, 33 wt%) was placed into an aerator which was kept in an ice bath. A carrier gas, N2, was then bubbled Electronic Supplementary Material (ESI) for Energy & Environmental Science. This journal is © The Royal Society of Chemistry 2016 into the solution, thus degassing the solution of MA. The MA gas which was produced was then passed through a drying tube filled with a dessicant (Drietire and CaO), before it was bubbled directly into the ACN (Sigma Aldrich) which contained the perovskite precursors (1 MAI: 1.06 M PbI2) at a concentration of 0.5 M. The gas was bubbled into the black dispersion until the perovskite particles were completely dissolved resulting in a clear, light yellow solution.

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