物理化学学报 >> 2012, Vol. 28 >> Issue (07): 1797-1802.doi: 10.3866/PKU.WHXB201205081

材料物理化学 上一篇    

一维带状SnO2的电子传输性能

李晓宁1,2, 白守礼1, 杨文胜1, 陈霭璠1, 孙丽娜1, 林原2, 张敬波2,3   

  1. 1. 北京化工大学, 化工资源有效利用国家重点实验室, 北京 100029;
    2. 中国科学院化学研究所, 北京分子科学国家实验室, 北京 100190;
    3. 天津师范大学, 天津市功能分子结构与性能重点实验室, 天津 300387
  • 收稿日期:2012-03-02 修回日期:2012-05-08 发布日期:2012-06-07
  • 通讯作者: 白守礼, 张敬波 E-mail:jbzhang@iccas.ac.cn; baisl@mail.buct.edu.cn
  • 基金资助:

    国家自然科学基金(20873162, 51102011)和北京自然科学基金(8102028, 8112022)资助项目

Electron Transport Properties of One-Dimensional Structural SnO2 Belts

LI Xiao-Ning1,2, BAI Shou-Li1, YANG Wen-Sheng1, CHEN Ai-Fan1, SUN Li-Na1, LIN Yuan2, ZHANG Jing-Bo2,3   

  1. 1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China;
    2. Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China;
    3. Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Tianjin Normal University, Tianjin 300387, P. R. China
  • Received:2012-03-02 Revised:2012-05-08 Published:2012-06-07
  • Contact: BAI Shou-Li, ZHANG Jing-Bo E-mail:jbzhang@iccas.ac.cn; baisl@mail.buct.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20873162, 51102011) and Natural Science Foundation of Beijing, China (8102028, 8112022).

摘要:

采用水辅助化学气相沉积法制备了结晶性好的一维带状SnO2. 分别以小粒径锡粉和金修饰的小粒径锡粉作为反应原料制得带宽度不同的带状SnO2, 小粒径锡粉作为反应原料能提高带状SnO2的产率. 将所得SnO2带和SnO2纳米颗粒按不同比例混合配制成胶体, 采用刮涂法制备含不同比例纳米颗粒和纳米带的复合SnO2薄膜并组装染料敏化太阳能电池(DSSCs)来评价带状SnO2的电子输运性能. 组装的太阳能电池表现出与复合纳晶薄膜中一维SnO2带的带宽度和所含比例密切相关的光电性能. 通过强度调制光电流谱的测量确定复合SnO2薄膜的电子传输速率, 并进一步分析一维材料所具有的良好电子传输性能对光电流增加的贡献. 因为一维SnO2带在复合纳晶薄膜中作为电子输运的快速通道可以加快电子的输运速度, 所以以适宜的比例添加具有合适宽度的一维SnO2带可以明显提高太阳能电池的光电性能.

关键词: 二氧化锡一维带状结构, 电子传输, 复合纳晶薄膜, 染料敏化太阳能电池, 光电性能

Abstract:

Well-crystallized one-dimensional (1D) structural SnO2 belts are synthesized using a simple water-assisted chemical vapor deposition method. To increase the yield of SnO2 belts, small Sn particles with and without Au-modifications are used as source materials to grow different width SnO2 belts. Dye-sensitized solar cells (DSSCs) fabricated using the composite (nanoparticle/nanobelt) SnO2 thin films, are used to evaluate the electron transport properties of the SnO2 belts. Pastes containing different ratios of nanoparticles and belts are used to prepare the composite film by the doctor-blade method. The DSSCs exhibit different photovoltaic performances which are dependent on the nanoparticle/nanobelt ratio and width of the SnO2 belts in the thin film. The enhanced electron transport properties of the composite films containing the SnO2 belts is evaluated using intensity modulated photocurrent spectroscopy (IMPS). 1D SnO2 belts with a particular belt width improve the photovoltaic performance by providing electron paths to accelerate electron transport in the composite nanocrystalline thin films.

Key words: One-dimensional structural SnO2 belt, Electron transport, Composite nanocrystalline thin film, Dye-sensitized solar cell, Photovoltaic performance

MSC2000: 

  • O646