Energy Level Alignment and Interactions at Potential Contacts for Spin Injection into Organic Semiconductors

• Published in: Advanced engineering materials Vol. 11; no. 4; pp. 285 - 290
• Main Authors: Grobosch, Mandy, Dörr, Katrin, Gangineni, Ramesh B., Knupfer, Martin
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01.04.2009; WILEY‐VCH Verlag; Wiley-VCH
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Electron and ion emission by liquids and solids; impact phenomena; Electronic transport in condensed matter; Exact sciences and technology; Interface; Interfaces, heterostructures, nanostructures; Magnetic properties and materials; Magnetotransport phenomena, materials for magnetotransport; Manganites; Organic semiconductor; Photoemission; Photoemission and photoelectron spectra; Physics; Spin polarized transport; Spintronic; Photoelectron spectra; Energy levels; Frontier orbital; Metallophthalocyanine; Interface electron state; Organic semiconductors; Spin injection; Manganites; Copper complexes
• ISSN: 1438-1656; 1527-2648
• DOI: 10.1002/adem.200800240

The present study provides the interface electronic properties between La0.7Sr0.3MnO3 and two archetype organic semiconductors, CuPc and α‐6T using a combined X‐ray‐ and ultraviolet photoelectron spectroscopy. La0.7Sr0.3MnO3 is a ferromagnetic metal and can be used to inject spin‐polarized current into organic semiconductors. The energy level alignment depends on the cleaning procedure that is applied to the La0.7Sr0.3MnO3 surface prior to deposition of the organic semiconductor.