Regensburg 2022 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 42: Perovskite and Photovoltaics 5 (joint session HL/CPP/KFM)

CPP 42.1: Talk

Thursday, September 8, 2022, 15:00–15:15, H31

Atomically Thin Sheets of Lead-Free 1D Hybrid Perovskites Feature Tunable White-Light Emission from Self-Trapped Excitons — •Philip Klement¹, Natalie Dehnhardt², Chuan-Ding Dong³, Florian Dobener¹, Julius Winkler², Samuel Bayliff⁴, Detlev M. Hofmann¹, Peter J. Klar¹, Stefan Schumacher^3,5, Sangam Chatterjee¹, and Johanna Heine² — ¹Institute of Experimental Physics I and Center for Materials Research (ZfM), Justus Liebig University Giessen, Giessen, Germany — ²Department of Chemistry and Material Sciences Center, Philipps-Universität Marburg, Marburg, Germany — ³Department of Physics and Center for Optoelectronics and Photonics Paderborn (CeOPP), Paderborn University, Paderborn, Germany — ⁴Department of Chemistry and Biochemistry, University of Oklahoma, Norman, OK, USA — ⁵College of Optical Sciences, The University of Arizona, Tucson, AZ, USA

One of the major current challenges in 2D materials' synthesis is the intentional design of building blocks to introducing superior chemical and physical properties. The limiting factor in this approach is the commonly-believed paradigm that in-plane covalent interactions are strictly necessary to form 2D materials, limiting the number of candidates. Here, we go beyond the paradigm that atomically thin materials require in-plane covalent bonding and report single layers of the one-dimensional organic-inorganic perovskite [C7H10N]3[BiCl5]Cl. Its unique 1D-2D structure enables single layers and the formation of self-trapped excitons which show white-light emission.