Proceedings of International Conference on Perovskite Thin Film Photovoltaics, Photonics and Optoelectronics (ABXPV18PEROPTO)
Publication date: 11th December 2017
Organolead trihalide perovskite materials have been widely used as light absorbers in efficient photovoltaic cells. Solution engineering is a fast and effective method to fabricate a perovskite films. In this manuscript, we reported a fast precipitation of pin-hole free perovskite film by small molecule driven directed diffusion engineering. Solvent molecules diffuse easily and quickly by colliding with small molecules by taking Helium as an example. By deeply analyzing of colliding mechanism and Monte Carlo simulation, we proposed a solution method to dry solution quickly by small molecules driven directed diffusion. And finally, full compact perovskite films and highly efficient perovskite solar cells have been achieved, and the devices show high efficiency and perdurable stability. It has still reserved c.a. 90% of original efficiency after more than 1000 hours testing. The small molecule driving directed diffusion offers a promising fast precipitation of perovskite film and high efficient, stable perovskite solar cells.
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