高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (6): 1908.doi: 10.7503/cjcu20200795

• 物理化学 • 上一篇    下一篇

基于电化学重氮还原的碳膜电极表面修饰及功函调控

许晓娜1,3, 史成乾2, 丁小海1, 薛俊红1, 王冬1, 田丽贤1, 李柏力1, 朱艳英1,2,3, 于曦1()   

  1. 1.天津大学理学院, 天津市分子光电科学重点实验室, 2. 天津纳米颗粒与纳米系统国际研究中心, 天津 300072
    3.南开大学现代光学研究所, 天津市微尺度光信息科学与技术重点实验室,天津 300350
    4.燕山大学理学院, 秦皇岛 066004
  • 收稿日期:2020-11-06 出版日期:2021-06-10 发布日期:2021-06-08
  • 通讯作者: 于曦 E-mail:xi.yu@tju.edu.cn
  • 基金资助:
    国家自然科学基金(11774255);天津市自然科学基金(18JCQNJC02600)

Surface Modification and Work Function Control of Carbon Film Electrode Based on Electrochemical Diazonium Reduction

XU Xiaona1,3, SHI Chengqian2, DING Xiaohai1, XUE Junhong1, WANG Dong1, TIAN Lixian1, LI Baili1, ZHU Yanying1,2,3, YU Xi1()   

  1. 1.Tianjin Key Laboratory of Molecular Optoelectronic Sciences,School of Science
    2.Tianjin International Center for Nano Particles and Nano System,Tianjin University,Tianjin 300072,China
    3.Tianjin Key Laboratory of Micro?scale Optical Information Science and Technology,Institute of Modern Optics,Nankai University,Tianjin 300350,China
  • Received:2020-11-06 Online:2021-06-10 Published:2021-06-08
  • Contact: YU Xi E-mail:xi.yu@tju.edu.cn
  • About author:The authors contributed to this work equally.|The authors contributed to this work equally.
  • Supported by:
    the National Natural Science Foundation of China(11774255);the Natural Science Foundation of Tianjin, China(18JCQNJC02600)

摘要:

基于高温裂解光刻胶制备的碳薄膜(PPF)是一种新型的性能优异的碳基电极. 为了拓展其在功能器件中的应用, 利用电化学重氮还原法在PPF电极表面生长了三氟甲基苯胺重氮盐(CF3-PD)和对氨基苯甲醚重氮盐(OCH3-PD)两种组分的混合膜. 通过调节两组分溶液在混合膜中的摩尔浓度比例, 实现了对PPF电极功函的可控调节. 紫外光电子能谱(UPS)和开尔文探针显微镜(KPFM)对修饰前后PPF电极功函(?)的表征表明, 随着混合溶液中CF3-PD组分的摩尔分数从0增至100%, PPF电极的?(4.75 eV)从4.5 eV梯度增至5.14 eV. 研究结果实现了可在一定范围内“定制”PPF电极功函, 为碳膜电极在分子光电器件中的应用奠定了基础.

关键词: 碳膜电极, 重氮还原反应, 混合分子层, 功函数

Abstract:

Pyrolyzed photoresist films(PPF) is a new type of carbon-based electrode material of excellent and modulable performance. To facilitate its applications in organic electronic devices, we modulated the work function(?) of the PPF via the electrochemical diazonium reduction method to grow mixed layer containing two components, trifluoromethyl(CF3-PD) and p-anisidine(OCH3-PD) on the surface of the PPF electrode. By adjusting the relative concentration of the two-components in the solution, gradient work functions of the PPF electrode were obtained. Work functions of the modified PPF electrodes were characterized by means of UV photoelectron spectroscopy(UPS) and Kelvin probe microscope(KPFM). The results show that as the concentration of the CF3-PD component in the mixed solution increases from 0 to 100%, the work function of the PPF electrode(?=4.75 eV) increases gradually from 4.5 eV to 5.14 eV. Our work has realized the tunable work functions of PPF electrodes and provided possibility for the further applications of PPF electrodes for molecular optoelectronic devices.

Key words: Carbon film electrode, Diazo reduction, Mixed molecular layer, Work function

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