2018/03/16 by H. Malissa, R. Miller, Douglas Baird +15 · 1 citation
Chemistry · Engineering · Materials Science · Physics and Astronomy · #Atomic physics #Charge (physics) #Charge carrier #Chemistry #Computational chemistry #Condensed matter physics #Coupling (piping) #Density functional theory #Electron paramagnetic resonance #Magnetism in coordination complexes #Materials science #Nuclear magnetic resonance #Organic Light-Emitting Diodes Research #Organic and Molecular Conductors Research #Physics #Quantum mechanics #Resonance (particle physics) #Spin (aerodynamics) #Spins #Spin–orbit interaction #Thermodynamics #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.97.161201
published as Phys. Rev. B 97, 161201 (2018) · 6 pages, 4 figures
arxiv created 2018/03/16 · openalex created_date 2018/03/29 · openalex publication_date 2018/04/09 · arxiv updated 2018/04/18 · openalex updated_date 2026/08/06
Spin-orbit coupling (SOC) effects on charge carriers in organic light emitting diodes (OLEDs) impact spin lifetimes, spin-transport properties, and magnetic-field effects. Previous attempts to measure SOC in organic semiconductors have been indirect. Here, the authors utilize quantum chemistry to predict the effect of SOC on magnetic resonance line shapes as determined by the microscopic -tensor. To test the predictions, they measure electrically detected magnetic resonance on OLEDs at high fields of up to 12T. The results indicate that the structural disorder of the polymer has only weak influence on SOC and that spin-related phenomena in OLEDs are fundamentally monomolecular in nature.