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Core/Shell PbSe/PbS QDs TiO_2 Heterojunction Solar Cell

机译：核/壳PbSe / PbS QDs TiO_2异质结太阳能电池

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摘要

Quasi type-ll PbSe/PbS quantum dots (QDs) are employed in a solid state high efficiency QD/TiO2 heterojunction solar cell. The QDs are deposited using layer-by-layer deposition on a half-micrometer-thick anatase TiO2 nanosheet film with (001) exposed facets. Theoretical calculations show that the carriers in PbSe/PbS quasi type-Ⅱ QDs are delocalized over the entire core/shell structure, which results in better QD film conductivity compared to PbSe QDs. Moreover, PbS shell permits better stability and facile electron injection from the QDs to the TiO2 nanosheets. To complete the electricalcircuit of the solar cell, a Au film is evaporated as a back contact on top of the QDs. This PbSe/PbS QD/TiO_2 heterojunction solar cell produces a light to electric power conversion efficiency (77) of 4% with short circuit photocurrent (Jse) of 17.3 mA/cm~2. This report demonstrates highly efficient core/shell near infrared QDs in a QD/TiO_2 heterojunction solar cell.
机译：准II型PbSe / PbS量子点（QD）用于固态高效QD / TiO 2异质结太阳能电池中。使用逐层沉积在具有（001）暴露面的半微米厚的锐钛矿型TiO2纳米片薄膜上沉积QD。理论计算表明，PbSe / PbS准Ⅱ型量子点中的载流子在整个核/壳结构上是离域的，与PbSe量子点相比，QD薄膜的电导率更高。此外，PbS壳具有更好的稳定性和从QD到TiO2纳米片的便捷电子注入。为了完成太阳能电池的电路，Au薄膜作为QD顶部的背触点蒸发。这种PbSe / PbS QD / TiO_2异质结太阳能电池在短路光电流（Jse）为17.3 mA / cm〜2的情况下，可产生4％的光电转换效率（77）。该报告证明了QD / TiO_2异质结太阳能电池中的高效核/壳近红外QD。

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  • 来源
    《Advanced Functional Materials》 |2013年第21期|2736-2741|共6页
  • 作者

    Lioz Etgar; Diana Yanover; Richard Karel Capek; Roman Vaxenburg; Zhaosheng Xue; Bin Liu; Mohammad Khaja Nazeeruddin; Efrat Lifshitz; Michael Graetzel;

  • 作者单位

    Institute of Chemistry The Hebrew University of Jerusalem Jerusalem, 91904, Israel,Department of Sciences and Chemical Engineering Ecole Polytechnique Federale de Lausanne- EPFL, Lausanne, 1015, Switzerland;

    Schulich Faculty of Chemistry Solid State Institute Russell Berrie Nanotechnology Institute Grand Technion Energy Program, Technion, Haifa 32000, Israel;

    Schulich Faculty of Chemistry Solid State Institute Russell Berrie Nanotechnology Institute Grand Technion Energy Program, Technion, Haifa 32000, Israel;

    Schulich Faculty of Chemistry Solid State Institute Russell Berrie Nanotechnology Institute Grand Technion Energy Program, Technion, Haifa 32000, Israel;

    Department of Chemical and Biomolecular Engineering National University of Singapore, Singapore;

    Department of Chemical and Biomolecular Engineering National University of Singapore, Singapore;

    Department of Sciences and Chemical Engineering Ecole Polytechnique Federale de Lausanne- EPFL, Lausanne, 1015, Switzerland;

    Schulich Faculty of Chemistry Solid State Institute Russell Berrie Nanotechnology Institute Grand Technion Energy Program, Technion, Haifa 32000, Israel;

    Department of Sciences and Chemical Engineering Ecole Polytechnique Federale de Lausanne- EPFL, Lausanne, 1015, Switzerland;

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