Unlocking amplified magneto-photocurrent using multi-field manipulation in nonfullerene organic bulk heterojunction systems

An effective manipulation of polaron pairs (PPs) for realizing amplified magneto-photocurrent (AMPC) is of critical importance toward the development of low power consumption and high-performance organic spin-optoelectronic devices, for instance magneto-photo-volatile memories. By far, it is challen...

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Veröffentlicht in:The Journal of chemical physics 2024-10, Vol.161 (13)
Hauptverfasser: Hu, Jiaji, Kan, Lixuan, Xie, Yongchao, Zhang, Xiangpeng, Jiang, Linze, Li, Yang, Li, Jing, Zhu, Xixiang, Yu, Haomiao, Li, Jinpeng, Duan, Wubiao, Wang, Kai
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Sprache:eng
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Zusammenfassung:An effective manipulation of polaron pairs (PPs) for realizing amplified magneto-photocurrent (AMPC) is of critical importance toward the development of low power consumption and high-performance organic spin-optoelectronic devices, for instance magneto-photo-volatile memories. By far, it is challenging and there is a lack of method to reach AMPC. The typical magneto-photocurrent due to the light–matter interanion is primarily for unveiling the spin-dependent electron–hole dissociation in organic solar cells. Herein, we achieved an AMPC of ∼140% in nonfullerene organic bulk heterojunction systems at room temperature. We found that the amplification can be effectively triggered by a multi-field to a large number of photogenerated PPs at intermediate charge transfer states. We further postulate that, at steady state, they may experience a cyclic photophysical process due to the triplet-exciton polaron interaction. This study paves the way for the realization of AMPC in the organic spin-optoelectronic system.
ISSN:0021-9606
1089-7690
1089-7690
DOI:10.1063/5.0227273