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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 7: Perovskites - organized by Eva M. Herzig (University of Bayreuth, Bayreuth)

CPP 7.4: Talk

Tuesday, March 23, 2021, 10:00–10:20, CPPa

Understanding the crystallization of solution processed, alloyed perovskites by multimodal characterization — •Shambhavi Pratap^{1, 2}, Nobumichi Tamura², Zhenghao Yuan³, Alastair MacDowell², Nicola Barchi⁴, Jonathan Slack², Carolin Sutter-Fella⁴, and Peter Müller-Buschbaum¹ — ¹Lehrstuhl für Funktionelle Materialien, TU München, 85748 Garching, Germany — ²Advanced Light Source, Lawrence Berkeley National Laboratory, 94720 Berkeley, USA — ³Eberly College of Science, The Pennsylvania State University, State College,16801, USA — ⁴Chemical Sciences Division, Lawrence Berkeley National Laboratory, 94720 Berkeley, USA

The crystallization behavior of solution processed hybrid plumbohalide perovskites is an ideal study to understand the formation of chemical alloys. Precursors corresponding to two different perovskites are mixed to serve as the precursor for an alloyed species. During crystallization, distinct crystalline species are isolated and characterized, as the equilibrium between the complex precursor intermediates and perovskites is transformed to the crystalline product by annealing the structure. The evolution of chemical structures is temporally resolved and the transient structures are studied for their optoelectronic transformation by photoluminescence.