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首页> 外文期刊>Advanced Functional Materials >Band Engineering via Gradient Molecular Dopants for CsFA Perovskite Solar Cells
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Band Engineering via Gradient Molecular Dopants for CsFA Perovskite Solar Cells

机译：CSFA钙钛矿太阳能电池梯度分子掺杂剂带工程

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摘要

Perovskites with the multi-cation composition of cesium (Cs), methylammonium (MA), and formamidinium (FA) (CsMAFA) are pursued for their high power conversion efficiencies, but they are limited by their thermal stability. To withstand damp-heat accelerated aging MA-free compositions such as CsFA are of interest, but these exhibit lower carrier diffusion lengths and thus lesser performance in photovoltaic devices. A band engineering strategy that overcomes limited carrier diffusion within inverted perovskite solar cells based on CsFA is reported. A joint experimental-computational study shows that treating the perovskite with an n-type molecular dopant increases band bending, shaping the electric field across the active layer to overcome limited diffusive transport. Using this strategy, CsFA solar cell devices with stabilized power conversion efficiencies of 20.3%, a high value for devices using CsFA active layers, are fabricated.
机译：培养具有铯（Cs），甲基（MA）和甲脒（FA）（CSMAFA）的多阳离子组成的钙钛矿，但它们的高功率转化效率，但它们受到其热稳定性的限制。为了承受抑制热加速的老化的衰老，例如CSFA的无马的组合物，但这些表现出较低的载流子扩散长度，从而表现出光伏器件中的较小性能。报道了一种基于CSFA的倒置钙钛矿太阳能电池内克服有限载流子扩散的带工程策略。联合实验 - 计算研究表明，用n型分子掺杂剂处理钙钛矿，增加带弯曲，在活性层上形成电场以克服有限的漫射运输。使用该策略，CSFA太阳能电池器件具有稳定的电力转换效率为20.3％，使用CSFA有源层的器件的高值进行制造。

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  • 来源
    《Advanced Functional Materials》 |2021年第18期|2010572.1-2010572.5|共5页
  • 作者

    Huang Ziru; Wei Mingyang; Proppe Andrew Harald; Chen Hao; Chen Bin; Hou Yi; Ning Zhijun; Sargent Edward;

  • 作者单位

    Univ Toronto Dept Elect & Comp Engn 35 St George St St George ON M5S 1A4 Canada;

    Univ Toronto Dept Elect & Comp Engn 35 St George St St George ON M5S 1A4 Canada;

    Univ Toronto Dept Elect & Comp Engn 35 St George St St George ON M5S 1A4 Canada;

    ShanghaiTech Univ Sch Phys Sci & Technol Shanghai 201210 Peoples R China;

    Univ Toronto Dept Elect & Comp Engn 35 St George St St George ON M5S 1A4 Canada;

    Univ Toronto Dept Elect & Comp Engn 35 St George St St George ON M5S 1A4 Canada;

    ShanghaiTech Univ Sch Phys Sci & Technol Shanghai 201210 Peoples R China;

    Univ Toronto Dept Elect & Comp Engn 35 St George St St George ON M5S 1A4 Canada;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    carrier transport; CsFA; doping; perovskites; solar cells;

    机译：载体运输;CSFA;兴奋剂;钙钛矿;太阳能电池;

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