Fig. 3: The stability of perovskite films modified with or without HPMCP.
From: Green encapsulants boost stability and sustainability in inverted perovskite solar cells
a The images of fresh and aged perovskite films of control and target. b XRD patterns of control and HPMCP-modified perovskite films as a function of aging time in ambient air. c 1 H NMR spectra of FAI, and FAI + HPMCP mixed solution. d Snapshots of the system in 200 ps: perovskite-water and perovskite with HPMCP-water. e Scatter plot of N in X-Z plane of control and target perovskites. f, g GIXRD spectra with different ψ from 0° to 50° of control and target perovskite films. h Linear fit of GIXRD spectra of control and target perovskite films.
