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A rectifying diode with hysteresis effect from an electroactive hybrid of carbazole-functionalized polystyrene with CdTe nanocrystals via electrostatic interaction

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Abstract

One of the strategies to tune current-voltage behaviors in organic diodes is to combine field-induced charge transfer processes with schottky barrier. According to this principle, a rectifying diode with hysteresis effect was fabricated utilizing a hybrid of electroactive polystyrene derivative covalently tethered with electron-donor carbazole moieties and electrostatic linked with electron-acceptor CdTe nanocrystals. Current-voltage characteristics show an electrical switching behavior with some hysteresis is only observed under a negative bias, with three orders of On/Off current ratio. The hybrid material based rectifier exhibits a rectification ratio of six and its maximum rectified output current is about 5 × 10−5 A. The asymmetric switching is interpreted as the result of both field induced charge transfer and schottky barrier, capable of reducing the misreading of cross-bar memory. Meanwhile, chemical doping of CdTe nanocrystals instead of physical blend favor their uniform dispersion in matrix and stable operation of device.

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Authors and Affiliations

  1. Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing, 210046, China

    JuQing Liu, Ting Jiang, ZongQiong Lin, ShuFen Chen, LingHai Xie, QuLi Fan, QiDan Ling & Wei Huang

  2. School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore

    XiaoYing Qi & Hua Zhang

Authors
  1. JuQing Liu
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  2. XiaoYing Qi
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  3. Ting Jiang
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  4. ZongQiong Lin
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  5. ShuFen Chen
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  6. LingHai Xie
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  7. QuLi Fan
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  8. QiDan Ling
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  9. Hua Zhang
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  10. Wei Huang
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Correspondence to LingHai Xie or Wei Huang.

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Liu, J., Qi, X., Jiang, T. et al. A rectifying diode with hysteresis effect from an electroactive hybrid of carbazole-functionalized polystyrene with CdTe nanocrystals via electrostatic interaction. Sci. China Chem. 53, 2324–2328 (2010). https://doi.org/10.1007/s11426-010-4095-8

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  • DOI: https://doi.org/10.1007/s11426-010-4095-8

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