Video 6 | Spin coated perovskite sample S4, He, 80°C (GI-WAXS)

DOI: 10.1039/C6CE00965D. Supporting Information. http://pubs.rsc.org/en/Content/Articl...

We conducted a series of in-situ annealing GI-WAXS
measurements on films spin coated from MAI:PbCl2 (3:1 mol in DMF) on Si/SiO2 substrates coated with poly(3,4-ethylenedioxythiophene) polystyrene sulfonate PEDOT: PSS . We investigated a combination of
perovskite films annealed at different temperatures and at different ambient conditions.

Abstract. We report for the first time on grain rotation in CH3NH3PbI3 perovskite films for ∼12% efficient planar solar cells and present a new method for investigating their texture evolution during thermal annealing. Our technique is based on in situ 2D grazing incidence wide-angle X-ray scattering (GI-WAXS) and employs a 10 keV wide-focussed X-ray beam to simultaneously probe a large number of grains. The ability to track the texture dynamics from a statistically relevant number of spots diffracting from single grains during thermal annealing and in grazing incidence geometry can have applications understanding the processing dynamics of a range of new materials.