Figure 2
Ratio of integrated intensity ( ) as a function of thickness for CsPbBr3 with . (a) Two-beam model; (b) many-beam model. A decaying exponential was fitted to each hkl curve, yielding absorption parameters = 89.9 nm, = 2.0 nm (two-beam) and = 93.2 nm, = 10.1 nm (many-beam). |