Publication date: 2nd November 2020
The long-standing interpretations for the exceptional photovoltaic and optoelectronic properties showcased by the perovskite family largely pertain to the underlying complicated interplay of polaron formation and hot carrier cooling. In the present talk we are going to discuss the existing status of the polaron studies conducted on CsPbBr3 based systems within the frame work ultrafast Femtosecond spectroscopic studies. We are going to discuss the key aspect which is accountable to polaron formation i.e. the carrier- Longitudinal Optical (LO) phonon coupling in different conditions which affect this FrÖhlich interaction mediated coupling. We have elaborately discussed the changes in the lattice polarity, surrounding dielectric medium, lattice temperature and the system dimensionality which can influence the charge screening extents and thereby the polaron formation process. Our investigation demonstrated the experimental conditions for polaron formation in CsPbBr3 based systems which are highly relevant for technological advancements.
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