Spin dependent transport in organic light-emitting diodes

TL;DR

This paper uses EDMR to investigate spin-dependent processes in organic LEDs, revealing insights into microscopic charge and exciton dynamics, interface effects, and electric fields in operational devices.

Contribution

It demonstrates the application of EDMR to probe molecular orbitals and interfaces in organic LEDs, providing new understanding of spin-dependent mechanisms.

Findings

EDMR can probe molecular orbitals of charge

Reveals microscopic origin of spin-dependent processes

Provides insights into interfaces and exciton formation

Abstract

Electrically Detected Magnetic Resonance (EDMR) was used to study a series of multilayer organic devices based on aluminum (III) 8-hydroxyquinoline. These devices were designed to identify the micoscopic origin of different spin dependent process, i.e. hopping and exciton formation. EDMR is demonstrated to probe molecular orbitals of charge, and thus indirectly explore interfaces, exciton formation, charge accumalation and electric fields in operating organic based devices.