Figure 1 | Scientific Reports

Figure 1

From: Organic heterojunctions: Contact-induced molecular reorientation, interface states and charge re-distribution

Figure 1

Schematic energy level diagrams for organic/organic heterojunctions with a bottom electrode.

(a) In the case of vacuum level alignment at the electrode/organic and at the organic/organic interface the electrostatic potential ϕ (equivalent to work function) is constant. (b,c) Fermi level pinning occurs for both charge carrier types across an interlayer of unpinned material and results in a linear change of the electrostatic potential ϕ in the unpinned materials and shows energy level bending inside the pinned material. Charge transfer is indicated by the plus and minus signs for the respective areas where the sheet charge density is present.

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