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    武素丽

    • 教授     博士生导师   硕士生导师
    • 性别:女
    • 毕业院校:大连理工大学
    • 学位:博士
    • 所在单位:化工学院
    • 学科:应用化学. 精细化工
    • 办公地点:西部校区实验楼E-422
    • 联系方式:13842603107
    • 电子邮箱:wusuli@dlut.edu.cn

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    Effectively Utilizing NIR Light Using Direct Electron Injection from Up-Conversion Nanoparticles to the TiO2 Photoanode in Dye-Sensitized Solar Cells

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    论文类型:期刊论文

    发表时间:2013-12-17

    发表刊物:ADVANCED FUNCTIONAL MATERIALS

    收录刊物:SCIE、Scopus

    卷号:23

    期号:47

    页面范围:5910-5915

    ISSN号:1616-301X

    关键字:electron injection; up-conversion nanoparticles; nano-heterostructures; dye-sensitized solar cells; efficiency

    摘要:TiO2/NaYF4:Yb3+,Er3+ nano-heterostructures are prepared in situ on the TiO2 photoanode of dye-sensitized solar cells (DSCs). Transmission electron microscopy (TEM) and high-resolution (HR)-TEM confirm the formation of TiO2/NaYF4:Yb3+,Er3+ nano-heterostructures. The up-converted fluorescence spectrum of the photoanode containing the nano-heterostructure confirms electron injection from NaYF4:Yb3+,Er3+ to the condution band (CB) of TiO2. When using a photoanode containing the nano-heterostructure in a DSC, the overall efficiency () of the device is 17% higher than that of a device without the up-conversion nanoparticles (UCNPs) and 13% higher than that of a device containing mixed TiO2 and UCNPs. Nano-heterostructures of TiO2/NaYF4:Yb3+,Tm3+ and TiO2/NaYF4:Yb3+,Ho3+ can also be prepared in situ on TiO2 photoanodes. The overall efficiency of the device containing TiO2/NaYF4:Yb3+,Ho3+ nano-heterostructures is 15% higher than the control device without UCNPs. When nano-heterostructures of TiO2/NaYF4:Yb3+,Tm3+ are used, the open-circuit voltage (V-oc) and the short-circuit current density (J(sc)) are all slightly decreased. The effect of the different UCNPs results from the different energy levels of Er3+, Tm3+, and Ho3+. These results demonstrate that utilizing the UCNPs with the apporpriate energy levels can lead to effective electron injection from the UCNPs to the CB of TiO2, effectively improving the photocurrent and overall efficiency of DSCs while using NIR light.