Modeling of positive and negative organic magnetoresistance in organic light-emitting diodes

Sijie Zhang, N. J. Rolfe, P. Desai, P. Shakya, A. J. Drew, T. Kreouzis, W. P. Gillin
2012 Physical Review B  
The organic magnetoresistance of aluminium tris(8-hydroxyquinoline) based organic light-emitting diodes has been modeled using the triplet polaron interaction coupled with exciton dissociation. We have demonstrated that each of the processes is proportional to the exciton concentration over a wide range of operating conditions for a number of devices with a wide range of layer thicknesses. This work demonstrates that using a magnetic field to perturb the operation of a working organic device is
more » ... g organic device is particularly valuable in that it provides a new technique for studying a range of processes affecting current transport such as polaron trapping, triplet-polaron interactions, and exciton dissociation in fully working devices.
doi:10.1103/physrevb.86.075206 fatcat:a77i5fo7r5exzciy3syapybyly