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首页> 外文期刊>Advanced Functional Materials >Pulsed Laser Ablation Based Synthesis of PbS-Quantum Dot-Decorated One-Dimensional Nanostructures and Their Direct Integration into Highly Efficient Nanohybrid Heteroj unction-Based Solar Cells
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Pulsed Laser Ablation Based Synthesis of PbS-Quantum Dot-Decorated One-Dimensional Nanostructures and Their Direct Integration into Highly Efficient Nanohybrid Heteroj unction-Based Solar Cells

机译：基于脉冲激光烧蚀的PbS量子点修饰的一维纳米结构的合成及其直接集成到高效的基于纳米杂化结的太阳能电池中

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摘要

The pulsed laser deposition (PLD) technique is used for the direct fabrication of nanohybrid heteroju notions (NH-HJs) solar cells exhibiting high PCE and excellent stability in air without any encapsulation and/or resorting to any surface treatment, ligand engineering and/or post-synthesis processing. The NH-HJs are achieved through the PLD-based decoration of hydrothermally-grown one-dimensional TiO_2 nanorods (TiO_2-NRs) by PbS quantum dots (PbS-QDs). By optimizing both the amount of PbS-QDs (via the number of laser ablation pulses) and the length of the TiO_2-NRs, it is possible to achieve optimal NH-Hjs based PV devices with high power conversion efficiency (PCE) of 4.85%. This high PCE is found to occur for an optimal length of the NRs (=290 nm) which coincides with the average penetration depth of PbS-QDs into the porous TiO_2-NRs matrix, leading thereby to the formation of the largest extent of NH-HJs. Most importantly, the PCE of these novel devices is found to be fairly stable for several months under ambient air. The addition of single-wall carbon nanotubes (SWCNTs) onto the TiO_2-NRs prior to their decoration by PbS-QDs is shown to further enhance their PCE to a value as high as 5.3%, because of additional light absorption and improved charge collection ensured by SWCNTs.
机译：脉冲激光沉积（PLD）技术用于直接制造具有高PCE和在空气中具有出色稳定性的纳米混合异质概念（NH-HJs）太阳能电池，而无需进行任何封装和/或借助任何表面处理，配体工程和/或合成后处理。 NH-HJs是通过PbS量子点（PbS-QDs）对水热生长的一维TiO_2纳米棒（TiO_2-NRs）进行基于PLD的装饰而实现的。通过优化PbS-QD的数量（通过激光烧蚀脉冲的数量）和TiO_2-NRs的长度，可以实现最佳的基于NH-Hjs的PV器件，其高功率转换效率（PCE）为4.85％ 。发现这种高PCE发生在NRs的最佳长度（= 290 nm）时，这与PbS-QDs向多孔TiO_2-NRs基体中的平均渗透深度一致，从而导致形成最大程度的NH- HJ。最重要的是，发现这些新型设备的PCE在环境空气中可稳定几个月。已显示在用PbS-QDs装饰之前，在TiO_2-NRs上添加单壁碳纳米管（SWCNTs）可以进一步将其PCE值提高到5.3％，因为可以确保更多的光吸收和改善的电荷收集能力由SWCNTs。

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  • 来源
    《Advanced Functional Materials》 |2014年第26期|4042-4050|共9页
  • 作者

    I. Ka; B. Gonfa; V. Le Borgne; D. Ma; M. A El Khakani;

  • 作者单位

    Institut National de la Recherche Scientifique INRS-Energie, Materiaux et Telecommunications 1650, Blvd. Lionel-Boulet C.P. 1020J3X-1S2, Varennes, Qc, Canada;

    Institut National de la Recherche Scientifique INRS-Energie, Materiaux et Telecommunications 1650, Blvd. Lionel-Boulet C.P. 1020J3X-1S2, Varennes, Qc, Canada;

    Institut National de la Recherche Scientifique INRS-Energie, Materiaux et Telecommunications 1650, Blvd. Lionel-Boulet C.P. 1020J3X-1S2, Varennes, Qc, Canada;

    Institut National de la Recherche Scientifique INRS-Energie, Materiaux et Telecommunications 1650, Blvd. Lionel-Boulet C.P. 1020J3X-1S2, Varennes, Qc, Canada;

    Institut National de la Recherche Scientifique INRS-Energie, Materiaux et Telecommunications 1650, Blvd. Lionel-Boulet C.P. 1020J3X-1S2, Varennes, Qc, Canada;

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