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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 17: Poster I

CPP 17.14: Poster

Montag, 9. März 2026, 19:00–21:00, P5

Stabilization via Confinement of Halide Perovskites — •Marius Kaiser¹, Osama Alsheika², Helen Grüninger², and Eva M. Herzig¹ — ¹Dynamik- und Strukturbildung - Herzig Group, University of Bayreuth, Germany — ²Bavarian Center for Battery Technology (BayBatt) and Inorganic Chemistry, University of Bayreuth

The practical use of halide perovskites (HPs) for optoelectronic applications is severely limited by degradation caused by intense light exposure, heat, and unintended ion transport under external electric fields [1]. Key challenges in this field include understanding the underlying mechanisms, stabilizing the semiconductor, and achieving controlled electron and ion transport.

Methylammonium lead bromide (MAPbBr3) is used as a model system, and its lattice parameters are systematically investigated in both bulk form and when confined within SBA-15 silica nanopores (average diameter ~8.4 nm), across a range of temperatures and pore loadings.

Furthermore, we examine thermal expansion behaviour of the materials and evaluate the effect of surface functionalization.

These results provide valuable insights for the development of more stable HP-based optoelectronic devices with directionally controlled charge transport.

[1] Greve, C. et al. To Stop or to Shuttle Halides? The Role of an Ionic Liquid in Thermal Halide Mixing of Hybrid Perovskites. ACS Energy Lett. 8 (2023).

Keywords: Halide Perovskite; Confinement; MAPbBr3; SBA-15