高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (11): 2038-2044.doi: 10.7503/cjcu20170021

• 物理化学 • 上一篇    下一篇

Au掺杂对TiO2薄膜表面态及电荷传输性能的影响

郑家伟1,2, 姜玲1, 丁勇1,3, 莫立娥1, 丁有才1,2, 胡林华1(), 戴松元1,3()   

  1. 1. 中国科学院合肥物质科学研究院应用技术研究所, 中国科学院光伏与节能材料重点实验室, 合肥230088
    2. 中国科学技术大学研究生院科学岛分院, 合肥 230026
    3. 华北电力大学新型薄膜太阳电池北京市重点实验室, 北京 102206
  • 收稿日期:2017-01-10 出版日期:2017-11-10 发布日期:2017-10-30
  • 作者简介:联系人简介: 戴松元, 男, 博士, 教授, 博士生导师, 主要从事薄膜太阳电池研究. E-mail: sydai@ipp.ac.cn。胡林华, 男, 博士, 研究员, 博士生导师, 主要从事薄膜太阳电池研究. E-mail: lhhu@rntek.cas.cn
  • 基金资助:
    国家高技术研究发展计划项目(批准号: 2015AA050602)、 中国科学院国际合作局对外合作重点项目(批准号: GJHZ1607)、 国家自然科学基金(批准号: U1205112, 51572080, 21273242)和安徽省自然科学基金(批准号: 1508085SMF224)资助

Influence of Au Doping on the Surface States and Charge Transport in TiO2 Films

ZHENG Jiawei1,2, JIANG Ling1, DING Yong1,3, MO Lie1, DING Youcai1,2, HU Linhua1,*(), DAI Songyuan1,3,*()   

  1. 1. Key Laboratory of Photovoltaic and Energy Conservation Materials, CAS, Institute of Applied Technology,Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230088, China
    2. Science Island Branch of Graduate School, University of Science & Technology of China,University of Science and Technology of China, Hefei 230026, China
    3. Beijing Key Laboratory of Novel Thin Film Solar Cells, North China Electric Power University, Beijing 102206, China
  • Received:2017-01-10 Online:2017-11-10 Published:2017-10-30
  • Contact: HU Linhua,DAI Songyuan E-mail:lhhu@rntek.cas.cn;sydai@ipp.ac.cn
  • Supported by:
    † Supported by the National High Technology Research and Development Program of China(No.2015AA050602), the External Cooperation Program of BIC, Chinese Academy of Sciences(No.GJHZ1607), the National Natural Science Foundation of China(Nos.U1205112, 51572080, 21273242) and the Natural Science Foundation of Anhui Province, Chian(No.1508085SMF224)

摘要:

采用两步法合成了不同Au掺杂量的TiO2薄膜材料, 并通过循环伏安(CV)和电化学阻抗谱(EIS)探究了不同Au掺杂量TiO2薄膜的表面态数量及其在禁带中的分布情况. 借助强度调制光电流/电压谱(IMPS/IMVS)研究了薄膜内电子传输时间和寿命及界面电荷转移性能等. 结果表明, 适量Au(摩尔分数0.2%)的掺入可有效降低薄膜的表面态数量, 优化表面态分布情况, 提高电子在TiO2/染料/电解质界面的电阻, 从而改善电子的传输性能, 提升太阳电池的光电转换效率.

关键词: 表面态, 金掺杂, 二氧化钛薄膜, 电荷传输, 太阳电池

Abstract:

Nanoblocky TiO2 with different contents of Au doping was synthesized by two-step method. Cyclic voltammetry and electrochemical impedance spectroscopy were used to investigate the influence of Au doping on the number and distribution of surface states in the films. Meanwhile, intensity-modulated photocurrent/photovoltage spectroscopy was used to study the electron transfer and recombination process. The results show that Au doping can effectively reduce the surface states in TiO2 films and optimize the energy distribution. Furthermore, in-depth characterizations indicate that Au doping(molar fraction, 0.2%) can increase the charge transfer resistance at the interfaces of dyed-TiO2/electrolyte. Overall, the cell performance was relatively dependent on the effect of surface states essentially.

Key words: Surface state, Au Doping, TiO2 Film, Charge transport, Solar cell

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