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Synthesis and characterization of plasmon resonant gold nanoparticles and graphene for photovoltaics

机译：光伏等离振子共振金纳米粒子和石墨烯的合成与表征

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摘要

Here we discuss the use in solar cells of graphene grown by chemical vapor deposition (CVD) and of plasmonic gold nanoparticles (Au NPs) deposited by sputtering. The Au NPs have been coupled with a-Si heterojunction solar cells, with an organic active layer used in organic photovoltaics, and with graphene. Extensive characterization of those three systems by the optical technique of spectroscopic ellipsometry, which is suitable to monitor and analyze the plasmon resonance of the Au NPs, by the microstructural technique of Raman spectroscopy, which is suitable to analyze graphene properties and doping, and by atomic force microscopy has been carried out. Those techniques highlighted interactions between Au NPs and silicon, polymer and graphene, which lead to variation in the plasmon resonance of Au NPs and consequently in the characteristics of the Au NPs/Si, Au NPs/polymer and Au NPs/graphene hybrids. Specifically, we found that an optimal size and density of Au NPs are able to enhance the efficiency of c-Si/a-Si heterojunction solar cells and that exceeding with Au NPs size and density causes device shortcut because of interface interdiffusion between silicon and gold. To discuss organic photovoltaics, Au NPs have been combined with an electro-donating conjugated polymer, the poly[1,4bis(2-thienyl)-2,5-bis-(2-ethyl-hexyloxyphenylenes)]. We found that there is a strong correlation between the thickness and morphology of the organic active layer, which affects the energy and amplitude of the Au NPs plasmon resonance. Finally, Au NPs have been deposited on graphene. We found that Au NPs show the plasmon resonance in the region where graphene is transparent and also yield p-type doping of graphene decreasing its sheet resistance.
机译：在这里，我们讨论通过化学气相沉积（CVD）生长的石墨烯和通过溅射沉积的等离子体金纳米颗粒（Au NPs）在太阳能电池中的用途。 Au NP已与a-Si异质结太阳能电池，用于有机光伏的有机活性层以及石墨烯耦合。通过适合于监测和分析Au NPs的等离子体共振的光谱椭圆光学技术，适合于分析石墨烯性质和掺杂的原子光谱技术以及原子分析对这三个系统进行了广泛的表征力显微镜已进行。这些技术突出了金纳米颗粒与硅，聚合物和石墨烯之间的相互作用，这导致金纳米颗粒的等离子体共振变化，从而导致金纳米颗粒/硅，金纳米颗粒/聚合物和金纳米颗粒/石墨烯杂化体的特性发生变化。具体来说，我们发现最佳的Au NP尺寸和密度能够提高c-Si / a-Si异质结太阳能电池的效率，而超过Au NPs的尺寸和密度会由于硅和金之间的界面相互扩散而导致器件捷径。 。为了讨论有机光伏，Au NP已与供电子共轭聚合物聚[1,4双（2-噻吩基）-2,5-双-（2-乙基己氧基苯）]结合在一起。我们发现有机活性层的厚度和形态之间有很强的相关性，这影响了Au NPs等离子体激元共振的能量和幅度。最后，金纳米颗粒已经沉积在石墨烯上。我们发现Au NPs在石墨烯透明的区域显示了等离子体共振，并且还产生了石墨烯的p型掺杂，从而降低了其薄层电阻。

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  • 来源
    《Materials Science and Engineering》 |2013年第9期|559-567|共9页
  • 作者

    M.M. Giangregorio; M. Losurdo; G.V. Bianco; E. Dilonardo; P. Capezzuto; G. Bruno;

  • 作者单位

    Institute of Methodology and of Plasmas, IMIP-CNR, Department of Chemistry, University of Bari, via Orabona, 4 70126 Bari, Italy;

    Institute of Methodology and of Plasmas, IMIP-CNR, Department of Chemistry, University of Bari, via Orabona, 4 70126 Bari, Italy;

    Institute of Methodology and of Plasmas, IMIP-CNR, Department of Chemistry, University of Bari, via Orabona, 4 70126 Bari, Italy;

    Institute of Methodology and of Plasmas, IMIP-CNR, Department of Chemistry, University of Bari, via Orabona, 4 70126 Bari, Italy;

    Institute of Methodology and of Plasmas, IMIP-CNR, Department of Chemistry, University of Bari, via Orabona, 4 70126 Bari, Italy;

    Institute of Methodology and of Plasmas, IMIP-CNR, Department of Chemistry, University of Bari, via Orabona, 4 70126 Bari, Italy;

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  • 正文语种 eng
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  • 关键词

    Cold nanoparticles; Graphene; Surface plasmon resonance; Solar cells; Si heterojunction; Ellipsometry;

    机译：冷纳米颗粒;石墨烯表面等离子体共振;太阳能电池;硅异质结;椭偏仪;

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