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Petrus, M.L. (author), Bein, T. (author), Dingemans, T.J. (author), Docampo, P. (author)Most hole transporting materials (HTMs) prepared for perovskite solar cell applications are synthesized via cross-coupling reactions that require expensive transition metal catalysts, inert reaction conditions and extensive product purification; making large-scale production cost-prohibitive. Here, we describe the synthesis of a simple...journal article 2015