Preparation of One-dimensional Axial Organic-inorganic Heterojunction and Its Schottky Behavior

doi:10.6023/A12080591

Acta Chimica Sinica ›› 2012, Vol. 70 ›› Issue (22): 2337-2341.DOI: 10.6023/A12080591 Previous Articles Next Articles

Article

一维轴向有机无机异质结肖特基二极管的制备及性能研究

朱伟钢^a,b, 张德忠^a, 付红兵^a

a 北京分子科学国家实验室中国科学院化学研究所北京 100190;
b 中国科学院研究生院北京 100049

投稿日期:2012-08-24 发布日期:2012-11-14
通讯作者: 付红兵 E-mail:hongbing.fu@iccas.ac.cn
基金资助:
项目受国家自然科学基金(Nos. 90301010, 20873163, 20803085, 20925309)、中国科学院百人计划和国家重点基础研究发展计划(No. 2011CB808402)资助.

Preparation of One-dimensional Axial Organic-inorganic Heterojunction and Its Schottky Behavior

Zhu Weigang^a,b, Zhang Dezhong^a, Fu Hongbing^a

a Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190;
b Graduate University of the Chinese Academy of Sciences, Beijing 100049

Received:2012-08-24 Published:2012-11-14
Supported by:
Project supported by the National Natural Science Foundation of China (Nos. 90301010, 20873163, 20803085, 20925309), the Chinese Academy of Sciences ("100 Talents" program), and the National Research Fund for Fundamental Key Project 973 (No. 2011CB808402).

Preparation of one-dimensional organic-inorganic hybrid materials has always been a difficult problem, innovative performance and broad application prospects make it a hotspot in recent years. In this work, the organic conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) and inorganic metal silver (Ag) segmented nanowires were successfully synthesized through a electrochemical deposition method in the porous anodic alumina oxide (AAO) templates. In a typical experiment, firstly a thin layer of platinum was evaporated on one side of AAO templates served as anode in a two electrode electrochemical cell, while platinum was served as cathode. PEDOT nanowires were deposited into the AAO templates in 0.1 mol/L 3,4-ethylenedioxythiophene (EDOT) and 0.02 mol/L 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM]PF₆) acetonitrile solution by applying a voltage of 3 V for 20 min. Then the AAO templates contained PEDOT nanowires as a cathode was placed in another Ag⁺ containing solution, Ag blocks were deposited into the AAO templates at a current of 1 mA for 20 min. So the PEDOT-Ag segmented nanowires embedded AAO templates were acquired. Finally, aligned segmented PEDOT-Ag nanowires were obtained by dissolving the templates with 6 mol/L NaOH for 6 h and repeatedly rinsed with distilled water until the pH of the solution was 7. The morphology and structure of a single PEDOT-Ag nanowire were characterized using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The result showed that the sliver nanowire was grown epitaxially on the amorphous PEDOT nanowire. Using the top contact electrode method, we studied the I-V characteristic curves of single PEDOT nanowire and single PEDOT-Ag heterojunction nanowire. The results revealed that the single heterojunction nanowire showed a Schottky diode behavior, the forward turn-on voltage was 0.3 V, and the reverse breakdown voltage was 1.5 V. A Schottky junction formed at PEDOT/Ag interface due to the difference in work functions of two materials. To our surprise, the forward current of the Schottky diode reached microamp. Moreover, we believed that this novel nanoscale Schottky device with low turn-on voltage and huge forward current would be applied in the field of electronics, optics and catalysis.

Key words: poly(3,4-ethylenedioxythiophene), silver, organic/inorganic hybrid, Schottky diode

Cite this article

Zhu Weigang, Zhang Dezhong, Fu Hongbing. Preparation of One-dimensional Axial Organic-inorganic Heterojunction and Its Schottky Behavior[J]. Acta Chimica Sinica, 2012, 70(22): 2337-2341.

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一维轴向有机无机异质结肖特基二极管的制备及性能研究

Preparation of One-dimensional Axial Organic-inorganic Heterojunction and Its Schottky Behavior

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