Raman scattering from organic light emitting diodes

Abstract

We present Raman studies from working organic light emitting diodes (OLEDs) fabricated from a single layer of para-hexaphenyl (PHP). The OLEDs were fabricated on patterned ITO substrates with Al cathode. The Raman intensity ratio, I 1280/I 1220, increases with current injection. This is interpreted in terms of a conformational change where the phenyl rings become more aromatic (benzenoid) upon charge injection. Further, capacitance vs. voltage measurements indicate the presence of interface states.

Department(s)

JVIC-Center for Biomedical and Life Sciences
Physics, Astronomy, and Materials Science

Document Type

Conference Proceeding

DOI

https://doi.org/10.1063/1.1994486

Publication Date

6-30-2005

Journal Title

AIP Conference Proceedings

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