2011/07/08 by Qiming Peng, Peng, Qiming, Xianjie Li +3
Engineering · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Lanthanide and Transition Metal Complexes #Materials Science (cond-mat.mtrl-sci) #Molecular Junctions and Nanostructures #Organic Light-Emitting Diodes Research #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.1107.1550
17 pages, 5 figures
arxiv created 2011/07/08 · openalex publication_date 2011/07/08 · arxiv updated 2011/07/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We investigated the magnetic field effects (MFEs) in organic light-emitting diodes (OLEDs) through the transient electroluminescence (EL) method. The time-resolved MFEs on the emission were obtained for the first time, which would be a useful method to clarify the underlying mechanisms of the MFEs. The fluorescent dye doped tri-(8-hydroxyquinoline)-aluminum (Alq3) based OLEDs were fabricated. Then, the transient EL was measured both with and without a magnetic field. To explore the time-resolved MFEs on the emission of the device, the excitons population dynamics in the device have been analyzed by a kinetic model. Our results suggest that both the intersystem crossing between the singlet and triplet electron-hole pairs and the triplet-triplet annihilation perturbed by the external magnetic field cause the time-resolved MFEs.