Displacement Current Induced by Electron Spin Resonance in Organic Semiconductor
Displacement Current Induced by Electron Spin Resonance in Organic Semiconductor
复制标题
有机半导体中电子自旋共振引起的位移电流
DOI：
10.1080/15421406.2015.1105048
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发表时间：
2015
影响因子：
0.7
通讯作者：
Takayuki Nakajima
中科院分区：
文献类型：
--
作者：
Katsuichi Kanemoto;Takayuki Nakajima
利用电检测磁共振技术研究了聚合物二极管的电子自旋共振(ESR)跃迁引起的电流。结果表明，聚合物二极管在光激励下表现出很强的ESR感应电流。ESR电流表现出调制谐振条件的尖峰时间响应，并被认为是位移电流的结果。研究发现，位移电流的大小取决于用于有源层的聚合物。载流子的俘获和去俘获过程有望决定位移电流的时间分布，这表明具有浅陷阱能级的材料将适合应用于基于自旋的器件。
A current induced by electron spin resonance (ESR) transitions is investigated for polymer diodes using electrically detected magnetic resonance techniques. Polymer diodes under photoexcitation are shown to exhibit a strong ESR-induced current. The ESR current exhibits a spiked time response for modulation of the resonance condition and is concluded to result from a displacement current. The magnitude of the displacement current is found to vary depending on polymers used for active layers. Trapping and de-trapping processes of carriers are expected to determine the time profile of the displacement current, suggesting that materials with shallow trap levels would be suitable for applications to spin-based devices.