Regensburg 2016 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 37: Organic-Inorganic Systems II: Energy Level Alignment (organized by O)

CPP 37.1: Invited Talk

Wednesday, March 9, 2016, 10:30–11:00, S054

Energy level alignment mechanisms at hybrid inorganic/organic semiconductor interfaces — •Norbert Koch — Humboldt-Universität zu Berlin, Berlin, Germany — Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Berlin, Germany

Understanding the energy level alignment at hybrid inorganic/organic semiconductor interfaces is indispensable to devise methods that allow for level control. This is needed to achieve a desired functionality of that heterostructure, as for instance, a type-II alignment facilitates charge separation while a type-I alignment is suitable for energy transfer and radiative recombination. For the inorganic semiconductors ZnO and GaN, the use of interlayers, based on strong molecular acceptors and donors, can be employed to tune the energy level alignment with respect to an organic semiconductor deposited on top. Depending on the level alignment achieved in this way, the hybrid heterostructure functionality, e.g., energy or charge transfer, can be selected. Finally, the impact of the doping level of the semiconductors on interface energetics is discussed for a prototypical hybrid p-n-junction.