Macroscale and Nanoscale Morphology Evolution during in Situ Spray Coating of Titania Films for Perovskite Solar Cells
作者： Bo Su , Herbert A. Caller-Guzman , Volker Körstgens , Yichuan Rui , Yuan Yao
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摘要: Mesoporous titania is a cheap and widely used material for photovoltaic applications. To enable large-scale fabrication controllable pore size, we combined block copolymer-assisted sol–gel route with spray coating to fabricate films, in which the copolymer polystyrene-block-poly(ethylene oxide) (PS-b-PEO) as structure-directing template. Both macroscale nanoscale are studied. The kinetics thermodynamics of deposition processes simulated on macroscale, shows good agreement morphology spray-coated films obtained practice. On nanoscale, structure evolution probed situ grazing incidence small-angle X-ray scattering (GISAXS) during process. changes PS domain size depend not only micellization but also solvent evaporation coating. Perovskite (CH3NH3PbI3) solar cells (PSCs) based sprayed film fabricated, showc...
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