Fig. 3
From: Indirect tail states formation by thermal-induced polar fluctuations in halide perovskites
PL helicity upon circularly-polarized excitation. a Schematic of the Rashba split bands and selective excitation with circularly polarized light. b Right circularly polarized (σ−) PL spectra of MAPbBr3 SC upon left (σ+) and right (σ−) circularly polarized excitation with 532 nm laser at 77 K. c The degree of circular polarization (top panel) detected and (bottom panel) excited at different energies
