Large-scale aligned crystalline CH3NH3PbI3 perovskite array filmsElectronic supplementary information (ESI) available. See DOI: 10.1039/c5ta04936a

Owing to the lattice match, aligned CH 3 NH 3 PbI 3 perovskite array films composed of CH 3 NH 3 PbI 3 microribbons with the length at the sub-millimeter scale were fabricated on ST cut quartz which showed a fast photo-response. This method provides a simple and flexible approach to grow oriented crystalline CH 3 NH 3 PbI 3 arrays at the millimeter scale. Owing to the lattice match, large-scale aligned crystalline CH 3 NH 3 PbI 3 perovskite array films were fabricated on ST cut quartz.