Pressure induced emission enhancement and bandgap narrowing: experimental investigations and first principles theoretical simulations on a model halide perovskite

Debabrata Samanta, Sonu Pratap Chaudhary, Bishnupada Ghosh +3

We report high-pressure photoluminescence, Raman scattering, and x-ray diffraction measurements on a lead-free halide perovskite $C{s}_{3}S{b}_{2}B{r}_9$. At about 3 GPa, an electronic trans…