Publication date: 11th March 2026
Hybrid halide perovskites (HPs) represent a highly promising class of materials for optoelectronic applications such as solar cells and light-emitting diodes. However, their practical implementation is still severely limited by structural degradation induced by light exposure, elevated temperatures, and unintended ion transport driven by external or internal electric fields [1]. Addressing these challenges requires a detailed understanding of the underlying degradation mechanisms, as well as strategies to stabilize the material and enable controlled ion and electron 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 with average diameter of 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.
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