Energy and Battery文献A Closer Look into Two-Step Perovskite Conversion with X ray Scattering.pdfVIP

This is an open access article published under a Creative Commons Non-Commercial No Derivative Works (CC-BY-NC-ND) Attribution License, which permits copying and redistribution of the article, and creation of adaptations, all for non-commercial purposes. Letter /JPCL A Closer Look into Two-Step Perovskite Conversion with X‑ray Scattering Johannes Schlipf, † Pablo Docampo,‡ Christoph J. Schaffer,† Volker Korstgens,̈ † Lorenz Bießmann,† Fabian Hanusch,‡ Nadja Giesbrecht,‡ Sigrid Bernstorff,§ Thomas Bein,‡ and Peter Muller-Buschbaum*̈ ,† †Lehrstuhl fur Funktionelle Materialien, Physik-Department, Technische Universitat Munchen, James-Franck-Str. 1, 85748 Garching,̈ ̈ ̈ Germany ‡Department of Chemistry and Center for NanoScience (CeNS), University of Munich (LMU), Butenandtstr. 5-13, 81377 Munchen,̈ Germany §Elettra-Sincrotrone Trieste S.C.p.A., Strada Statale 14 - km 163.5 in AREA Science Park, Basovizza, 34149 Trieste, Italy S *Supporting Information ABSTRACT: Recently, hybrid perovskites have gathered much interest as alternative materials for the fabrication of highly efficient and cost-competitive solar cells; however, many questions regarding perovskite crystal formation and deposition methods remain. Here we have applied a two-step protocol where a crystalline PbI2 precursor film is converted to MAPbI3−x Clx