期刊
PHYSICAL REVIEW LETTERS
卷 108, 期 26, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.267601
关键词
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资金
- Department of Energy [DESC0000909]
- Australian Research Council [DP1093526]
- Utah MRSEC, NSF [DMR 1121252]
- Australian Research Council [DP1093526] Funding Source: Australian Research Council
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [0953225] Funding Source: National Science Foundation
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.
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