Fig. 3: Structural and optoelectronic analysis of as-received C60 powders and their films.
From: Sublimed C60 for efficient and repeatable perovskite-based solar cells
a HRTEM image of the highly molecularly crystalline region of thermally cycled C60 with low and b high magnification. c Zoom-in filtered HRTEM images showing possible fullerene derivatives. d DOS of pristine perovskite, perovskite/C60, and perovskite/C124 structures. e Charge density difference (CDD) distributions of perovskite/fullerene slabs. The charge delocalization is homogeneously distributed along the C60 molecule while the charges in C124 are distributed locally just above the surface, which can hinder the charge transfer along the z-axis.
