Fig. 4: Threshold photocarrier density for light-induced halide segregation.
From: Unified theory for light-induced halide segregation in mixed halide perovskites
a Threshold photocarrier density nt for the different compounds at room temperature T = 300 K for light-induced halide segregation, as a function of Br concentration x. b Threshold photocarrier density as a function of temperature for x = 0.5. The horizontal dashed line in (a) and (b) indicates the photocarrier density n = 5 × 10−7/f.u. in the mixed phase for about 1 Sun illumination. c Bromine concentration as a function of temperature at threshold photocarrier densities nt = 10−9 and 10−5/f.u.
