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首页> 外文期刊>Advanced energy materials >The Role of Hydrogen from ALD-Al_2O_3 in Kesterite Cu_2ZnSnS_4 Solar Cells: Grain Surface Passivation
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The Role of Hydrogen from ALD-Al_2O_3 in Kesterite Cu_2ZnSnS_4 Solar Cells: Grain Surface Passivation

机译：ALD-Al_2O_3中的氢在Kesterite Cu_2ZnSnS_4太阳能电池中的作用：晶粒表面钝化

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摘要

In this research, a new route of surface passivation is reported by introducing hydrogen from the atomic layer deposited (ALD) Al2O3 layer into pure sulfide Cu2ZnSnS4 (CZTS) solar cells. Different amounts of hydrogen are incorporated into the Cu2ZnSnS4/CdS interface through controlling the thickness of the ALD-Al2O3 layer. The device with three cycles of ALD-Al2O3 yields the highest efficiency of 8.08% (without antireflection coating) with improved open-circuit voltage of up to 70 mV. With closer examination on the passivation route of ALD-Al2O3, it is revealed by the surface chemisty study that the Al2O3 can be etched away by ammonium hydroxide in the CdS buffer deposition process. Instead, the hydrogen is detected within a shallow depth from the CZTS surface, and makes a significant difference in the measured distribution of contact potential difference and device performance. This may be interpreted by the effect of hydrogen passivation of the CZTS surface by curing dangling bonds at the surface of CZTS grains. This work may provide a new direction of further improving the performance of kesterite solar cells.
机译：在这项研究中，通过将氢从原子层沉积（ALD）Al2O3层引入纯硫化物Cu2ZnSnS4（CZTS）太阳能电池中，报道了一种新的表面钝化途径。通过控制ALD-Al2O3层的厚度，将不同量的氢掺入Cu2ZnSnS4 / CdS界面。具有三个ALD-Al2O3循环的器件产生的最高效率为8.08％（不带抗反射涂层），并且开路电压高达70 mV。通过仔细研究ALD-Al2O3的钝化途径，表面化学研究表明，在CdS缓冲液沉积过程中，Al2O3可以被氢氧化铵蚀刻掉。取而代之的是，在距CZTS表面较浅的深度内检测到氢，并在接触电势差和器件性能的测量分布中产生了显着差异。这可以通过固化CZTS晶粒表面的悬空键对CZTS表面进行氢钝化的效果来解释。这项工作可以为进一步改善硅藻土太阳能电池的性能提供新的方向。

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  • 来源
    《Advanced energy materials》 |2018年第23期|1701940.1-1701940.7|共7页
  • 作者

    Park Jongsung; Huang Jialiang; Yun Jaesung; Liu Fangyang; Ouyang Zi; Sun Heng; Yan Chang; Sun Kaiwen; Kim Kyung; Seidel Jan; Chen Shiyou; Green Martin A.; Hao Xiaojing;

  • 作者单位

    Univ New South Wales, Sch Photovolta & Renewable Energy Engn, Sydney, NSW 2052, Australia;

    Univ New South Wales, Sch Photovolta & Renewable Energy Engn, Sydney, NSW 2052, Australia;

    Univ New South Wales, Sch Photovolta & Renewable Energy Engn, Sydney, NSW 2052, Australia;

    Univ New South Wales, Sch Photovolta & Renewable Energy Engn, Sydney, NSW 2052, Australia;

    Univ New South Wales, Sch Photovolta & Renewable Energy Engn, Sydney, NSW 2052, Australia;

    Univ New South Wales, Sch Photovolta & Renewable Energy Engn, Sydney, NSW 2052, Australia;

    Univ New South Wales, Sch Photovolta & Renewable Energy Engn, Sydney, NSW 2052, Australia;

    Univ New South Wales, Sch Photovolta & Renewable Energy Engn, Sydney, NSW 2052, Australia;

    Univ New South Wales, Sch Photovolta & Renewable Energy Engn, Sydney, NSW 2052, Australia;

    Univ New South Wales, Sch Mat Sci Engn, Sydney, NSW 2052, Australia;

    East China Normal Univ, Sch Informat Sci & Technol, Shanghai 200241, Peoples R China;

    Univ New South Wales, Sch Photovolta & Renewable Energy Engn, Sydney, NSW 2052, Australia;

    Univ New South Wales, Sch Photovolta & Renewable Energy Engn, Sydney, NSW 2052, Australia;

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  • 正文语种 eng
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  • 关键词

    Al2O3; atomic layer deposition; Cu2ZnSnS4; hydrogen; passivation;

    机译：Al2O3;原子层沉积;Cu2ZnSnS4;氢;钝化;

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