高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (9): 1422.

• 论文 • 上一篇    下一篇

有机/聚合物材料体系能带结构的表征──电化学方法研究

宋文波1, 陈旭1, 吴芳2, 田文晶2, 马淤光2, 许宏鼎1   

  1. 1. 吉林大学化学系;
    2. 超分子结构与谱学开放实验室, 长春 130023
  • 收稿日期:1999-09-02 出版日期:2000-09-24 发布日期:2000-09-24
  • 通讯作者: 许宏鼎(1936年出生),男,教授,博士生导师,从事电分析化学研究.
  • 基金资助:

    国家自然科学基金(批准号:597905001)资助

Electrochemical Determination of the Energy Level of Organic/Polymeric Materials

SONG Wen-Bo1, CHEN Xu1, WU Fang2, TIAN Wen-Jing2, MA Yu-Guang2, XU Hong-Ding1   

  1. 1. Department of Chemistry;
    2. Jilin University, Changchun 130023, China
  • Received:1999-09-02 Online:2000-09-24 Published:2000-09-24

摘要: 以8-羟基喹啉铝和聚(N-乙烯基)咔唑为例,采用多种电化学方法确立了有机聚合物半导体材料的最高占有轨道和最低空轨道能级的位置,所得数据与光电子发射法表征结果一致.用电化学方法测得的带隙Egel与吸收光谱法得到的Egopt吻合.用测得的能带结构参数为依据研制的电致发光器件的发光性能很高.

关键词: 电化学表征方法, 能带结构, 带隙, 最高占有轨道和最低空轨道的能级

Abstract: We focus on the study of energy level structure of organic systems(taking AlQ3 for example) using two newly developed electrochemical methods(derivative voltammetry and coulomb-potential spectroscopy), and devote our attention to comparing the accuracy of these new methods with conventional methods. The experimental values of the HOMOand the LUMOpositions of AlQ3 and PVKare in good agreement with the results determined by the photoemission analysis. The experimental band gap values for AlQ3 and PVKobtained via two new methods are also in excellent agreement with the band gap values deduced by the optical absorption spectroscopy. The resulting organic/polymeric electroluminescent devices based on matching energy level of organic/polymeric system exhibit a high luminescent efficiency.

Key words: Electrochemical method, Energy band structrue, Band gap, Energy level of ELUMO and EHOMO

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