Fig. 2: Investigation of the longitudinal phase segregation mechanism in MAPb(BrxI1-x)3 (x = 0.905) single crystal. | Communications Materials

Fig. 2: Investigation of the longitudinal phase segregation mechanism in MAPb(BrxI1-x)3 (x = 0.905) single crystal.

From: Energy-band gradient structure originated from longitudinal phase segregation of mixed halide perovskite single crystal

Fig. 2

a PL evolution under two-photon excitation using 800 nm laser. b Variation of the I-rich emission intensity with respect to the illumination time under two-photon excitation. c TRPL of top and bottom crystal surface under single-photon excitation using 405 nm laser; d Intensity of I-rich emission feature with illumination time, extracted from the PL evolution of top and bottom surface under single-photon excitation. The experimental data and the fitting are shown in solid circles and lines respectively.

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