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首页> 外文期刊>Organic Electronics >Embedded organic hetero-junction and negative-differential-resistance photocurrent based on bias-assisted natural-drying of organic drops
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Embedded organic hetero-junction and negative-differential-resistance photocurrent based on bias-assisted natural-drying of organic drops

机译：基于有机液滴偏压自然干燥的嵌入式有机异质结和负微分电阻光电流

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摘要

This work reports a bias-assisted natural-drying method in film drop-casting for the formation of an interfacial layer inside the bulk organic film. The natural-drying facilitates phase segregation in the polymer blend, while the simultaneous substrate bias application induces host electronic states in the interfacial layer. Consequently, an embedded organic hetero-junction is formed between the interfacial layer and bulk film. The hetero-junction not only enhances the separation of photoexcited electron-hole (e_p - h_p) pairs, but also allows for the selective storage and extraction of photocarriers through the bias-induced host states. Unusual photocurrent with negative-differential-resistance (NDR) is thus obtained for the first time for organic optoelectronic devices. The typical peak-to-valley ratio of the NDR peak is ≥500, and the NDR behavior is stable for prolonged photocurrent measurements. The bias-assisted natural-drying method is simple and cost-effective, and can be used as a new approach to the design and control of organic interfaces.
机译：这项工作报道了在膜滴铸中使用偏压辅助的自然干燥方法，以在块状有机膜内部形成界面层。自然干燥有助于聚合物共混物中的相分离，而同时施加基材偏压会在界面层中引发主体电子态。因此，在界面层和块状膜之间形成了嵌入的有机异质结。异质结不仅增强了光激发电子-空穴对（e_p-h_p）的分离，还允许通过偏置诱导的宿主态选择性存储和提取光载流子。因此，有机光电器件首次获得了具有负微分电阻（NDR）的异常光电流。 NDR峰的典型峰谷比≥500，并且NDR行为对于长时间的光电流测量是稳定的。偏置辅助自然干燥方法简单且经济高效，可以用作有机界面设计和控制的新方法。

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  • 来源
    《Organic Electronics》 |2010年第9期|P.1543-1548|共6页
  • 作者

    Xian Ning Xie; Yuzhan Wang; Xingyu Gao; Kian Keat Lee; Chorng Haur Sow; Kian Ping Loh; Andrew Thye Shen Wee;

  • 作者单位

    NUS Nanoscience and Nanotechnology Initiative (NUSNN1), National University of Singapore. Singapore;

    Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 1I7542, Singapore;

    Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 1I7542, Singapore;

    NUS Nanoscience and Nanotechnology Initiative (NUSNN1), National University of Singapore. Singapore;

    NUS Nanoscience and Nanotechnology Initiative (NUSNN1), National University of Singapore. Singapore Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 1I7542, Singapore;

    NUS Nanoscience and Nanotechnology Initiative (NUSNN1), National University of Singapore. Singapore Department of Chemistry, National University of Singapore, Singapore;

    NUS Nanoscience and Nanotechnology Initiative (NUSNN1), National University of Singapore. Singapore Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 1I7542, Singapore;

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  • 正文语种 eng
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  • 关键词

    photo current negative differential; resistance; organic hetero-junction; bias-assissted drop casting;

    机译：光电流负微分;电阻;有机异质结;偏压辅助滴铸;

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