The Energy Level Alignment at the CH₃NH₃PbI₃/Pentacene Interface was resolved experimentally.

The downward band bending and the dipole found at the pentacene side would favorably drive holes away from the interface into pentacene.

A ∼0.7 eV offset between pentacene HOMO and CH₃NH₃PbI₃ VBM would be in favor of hole transfer whereas a ∼1.35 eV offset between pentacene LUMO and CH₃NH₃PbI₃ CBM should efficiently block the unwanted electron transfer from perovskite to pentacene.

Pentacene could be a viable hole transfer material candidate on perovskite to be explored in perovskite devices.