Fig. 6: Terahertz spectroscopy.
From: Dual phases of crystalline and electronic structures in the nanocrystalline perovskite CsPbBr3
a Data (dots) and best fits (solid lines) in the temperature range of 20–300 K. The results are offset by 150 Ω−1 m−1 for clarity. Notice the gradual appearance of the 2.0 THz shoulder below 150 K. b Fitting parameters of the two-Lorentz-oscillator model as a function of temperature for the peak near 1.6 THz and the peak near 2.4 THz.
