Fluorination of Organic Spacer Impacts on the Structural and Optical Response of 2D Perovskites.

ABSTRACT: Low-dimensional hybrid perovskites have triggered significant research interest due to their intrinsically tunable optoelectronic properties and technologically relevant material stability. In particular, the role of the organic spacer on the inherent structural and optical features in two-dimensional (2D) perovskites is paramount for material optimization. To obtain a deeper understanding of the relationship between spacers and the corresponding 2D perovskite film properties, we explore the influence of the partial substitution of hydrogen atoms by fluorine in an alkylammonium organic cation, resulting in (Lc)2PbI4 and (Lf)2PbI4 2D perovskites, respectively. Consequently, optical analysis reveals a clear 0.2 eV blue-shift in the excitonic position at room temperature. This result can be m

SUBMITTER: Garcia-Benito I 

PROVIDER: S-EPMC6999157 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature