A green solvent enables precursor phase engineering of stable formamidinium lead triiodide perovskite solar cells by Benjamin M. Gallant, Philippe Holzhey, Joel A. Smith, Saqlain Choudhary, Karim A. Elmestekawy, Pietro Caprioglio, Igal Levine, Alexandra A. Sheader, Esther Y-H. Hung, Fengning Yang, Daniel T. W. Toolan, Rachel C. Kilbride, Karl-Augustin Zaininger, James M. Ball, M. Greyson Christoforo, Nakita K. Noel, Laura M. Herz, Dominik J. Kubicki, Henry J. Snaith

“…Here, we address these challenges by introducing a high volatility, low toxicity, biorenewable solvent system to fabricate a range of 2D perovskites, which we use as highly effective precursor phases for subsequent transformation to α-formamidinium lead triiodide (α-FAPbI3), fully processed under ambient conditions. …”
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