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首页> 外文期刊>Journal of Materials Chemistry, C. materials for optical and electronic devices >Negative magnetoconductance effects in amorphous copper phthalocyanine thin film: trap-assisted bipolaron formation
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Negative magnetoconductance effects in amorphous copper phthalocyanine thin film: trap-assisted bipolaron formation

机译：非晶态铜酞菁薄膜中的负磁导效应：陷阱辅助双极化子形成

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摘要

Negative magnetoconductance (MC) effects have been observed over a large temperature range from room temperature to 20 K in amorphous copper phthalocyanine (CuPc) thin film. It is found that the negative MC increases when the temperature decreases. The corresponding current density-voltage characteristics of the device at different temperatures reveal that this negative MC is related to the presence of traps in CuPc thin film. Moreover, the magnitude of negative MC scales with current density for nearly three orders. Based on these results, trap-assisted bipolaron formation, a developed mechanism based on bipolaron, has been proposed. We suggest that traps existing in CuPc thin film can assist the formation of bipolarons through lowering the formation energy. This model is further confirmed by the negative MC responses with light illumination.
机译：在从室温到20 K的较大温度范围内，非晶铜酞菁（CuPc）薄膜中已观察到负磁导（MC）效应。发现随着温度降低，负MC增大。器件在不同温度下的相应电流密度-电压特性表明，该负MC与CuPc薄膜中陷阱的存在有关。此外，负MC的大小与电流密度成比例，接近三个数量级。基于这些结果，提出了基于双极子的陷阱辅助双极子形成机制。我们建议存在于CuPc薄膜中的陷阱可以通过降低形成能来协助双极化子的形成。该模型进一步被光照下的负MC响应所证实。

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