Metal-Organic Hybrid Interface States of A Ferromagnet/Organic Semiconductor Hybrid Junction as Basis For Engineering Spin Injection in Organic Spintronics
2012 (English)In: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 22, no 5, 989-997 p.Article in journal (Refereed) Published
Electrons in organic semiconductors (OSC) possess remarkably long spin relaxation times. Hybrid spintronic devices that combine OSC with ferromagnetic (FM) substrates are therefore expected to provide a route to devices with improved and new functionalities. A crucial role is played by the FM-OSC interface which governs the spin injection into the OSC. Using spin-resolved photoelectron spectroscopy and ab initio calculations we study here such possible injection channels in metal phthalocyanines (MPc). We report the first direct observation of the successful engineering of different spin-selective hybrid interface states at the Fermi level of a FM-OSC hybrid junction only by changing the central metal atom of a MPc. Our results demonstrate that tailoring the chemical interaction at the FM-OSC interface is a promising way to modify the spin injection channels and thus the spin injection capability.
Place, publisher, year, edition, pages
2012. Vol. 22, no 5, 989-997 p.
organic electronics, hybrid materials, electronic structure
IdentifiersURN: urn:nbn:se:uu:diva-172031DOI: 10.1002/adfm.201102297ISI: 000300931500011OAI: oai:DiVA.org:uu-172031DiVA: diva2:513414