Fig. 1: Chemical and physical interactions between perovskite and HPMCP.
From: Green encapsulants boost stability and sustainability in inverted perovskite solar cells
a Chemical structures of HPMCP and schematic illustration of the HPMCP-modification. b Transmission electron microscopy (TEM) images of HPMCP-modified perovskite film. c XPS spectra of Pb 4 f for the perovskite films with or without HPMCP modification.
