ArticleThe journal of physical chemistry letters2025
Disentangling Refractive Index Contributions in Transient Absorption Spectroscopy of Two-Dimensional Halide Perovskites.
Article in The journal of physical chemistry letters, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Two-dimensional (2D) halide perovskites are intensely researched for emerging light-emitting and -harvesting technologies due to their outstanding optoelectronic properties, strong quantum confinement, and enhanced ambient stability over their three-dimensional counterparts. A powerful technique for understanding their excited-state dynamics is transient absorption (TA) (pump-probe) spectroscopy. However, the interpretation can be complicated by simultaneous reflectivity changes arising from their high refractive index. Here, we adopt a Kramers-Kronig constrained variational analysis to disentangle these effects, as demonstrated for the prototypical Ruddlesden-Popper 2D perovskite phenylethylammonium lead iodide (PEA
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