Figure 1
From: Substrate-dependent electronic structure and film formation of MAPbI3 perovskites
Overview over the UPS data taken on the four different substrate PEIE (a), ITO (b), PEDOT:PSS (c), and MoO3 (d); onto these, the perovskite MAPbI3 was incrementally evaporated with d being the deposited (intended) layer thickness. The left-hand panels show the changes in sample work function which are marked by grey dashed lines. The right-hand panels show the occupied DOS; here, the VB onset is marked by black vertical lines. The black dashed lines indicate changes in substrate specific features, showing that band bending is taking place. In (d) the appearance of gap states is marked by a gray area.
