Baker, W. J. and Keevers, T. L. and Lupton, J. M. and McCamey, D. R. and Boehme, C.
Slow Hopping and Spin Dephasing of Coulombically Bound Polaron Pairs in an Organic Semiconductor at Room Temperature.
Physical Review Letters (PRL) 108 (26), p. 267601.
Other URL: http://link.aps.org/doi/10.1103/PhysRevLett.108.267601
Polaron pairs are intermediate electronic states that are integral to the optoelectronic conversion process in organic semiconductors. Here, we report on electrically detected spin echoes arising from direct quantum control of polaron pair spins in an organic light-emitting diode at room temperature. This approach reveals phase coherence on a microsecond time scale, and offers a direct way to probe charge recombination and dissociation processes in organic devices, revealing temperature-independent intermolecular carrier hopping on slow time scales. In addition, the long spin phase coherence time at room temperature is of potential interest for developing quantum-enhanced sensors and information processing systems which operate at room temperature.
|Date:||26 June 2012|
|Institutions:|| Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group John Lupton|
|Keywords:||DETECTED MAGNETIC-RESONANCE; LIGHT-EMITTING-DIODES; CONJUGATED POLYMER; FILMS |
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Partially|
|Deposited On:||14 Nov 2012 13:47|
|Last Modified:||15 Nov 2012 07:31|