Fig. 5

Exciton relaxation dynamics dominated by phonon quenching and exciton localization. a Differential reflection signals ΔR/R₀ for different temperatures, the peaks of ΔR/R₀ were normalized by globe maximum and the signals of 80 K–160 K were multiplied by 2 for clarity. b Ultrafast signals in a normalized by the maximum of each temperature. c, d Representative ultrafast signals extracted from b. e Physical scenario of temperature dependent exciton relaxation dynamics.