Figure 4
Effect of thermal ageing on the optical properties of high order mixed dimensional and 3D perovskites. (a) Time evolution of the absorption spectrum of the n = ∞ (3D MAPbI3) perovskite film upon heating at T = 150 °C and (b) the corresponding film colour variation. (c) Time-resolved photoluminescence decay dynamics of perovskite films with different dimensionality, aged at 85 °C for 4 hrs; (d) steady-state photoluminescence spectra of n = ∞ perovskite before and after ageing at 85 °C for 4 hrs.
