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首页> 外文期刊>Advanced Functional Materials >Nucleation and Crystallization Control via Polyurethane to Enhance the Bendability of Perovskite Solar Cells with Excellent Device Performance
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Nucleation and Crystallization Control via Polyurethane to Enhance the Bendability of Perovskite Solar Cells with Excellent Device Performance

机译：通过聚氨酯进行成核和结晶控制，以增强钙钛矿型太阳能电池的弯曲性能，并具有出色的器件性能

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摘要

Solar cells based on mixed organic-inorganic halide perovskites are promising photovoltaic technologies with low-cost and fantastic power conversion efficiency (PCE). Enhancing the nucleation and regulating the crystallization rate of perovskite films and improving the bendability of brittle hybrid grains are crucial to improving the photovoltaic performance of flexible perovskite solar cells (PVSCs). Here, a simple approach is first introduced for fabricating perovskite films with full coverage and larger crystalline size by incorporating the elastomer polyurethane (PU) into the perovskite precursor solution to both retard the crystallization rate and improve the bendability. Shiny, smooth perovskite films are obtained with compact, micrometer-sized crystalline grains that exhibit excellent photoelectric performances. The PVSCs fabricated by incorporating PU into the perovskite precursor offer an impressive PCE of 18.7% with almost no photocurrent hysteresis and excellent stability in ambient air. More importantly, the elastomer PU additive crosslinks the grain boundaries between neighboring perovskite crystals to form a PU network that effectively improves the bendability of the perovskite films.
机译：基于混合的有机-无机卤化物钙钛矿的太阳能电池是有前途的光伏技术，具有低成本和出色的功率转换效率（PCE）。增强钙钛矿薄膜的成核和调节钙钛矿薄膜的结晶速率以及改善脆性杂化晶粒的可弯曲性对于提高柔性钙钛矿太阳能电池（PVSC）的光伏性能至关重要。在这里，首先引入一种简单的方法，通过将弹性体聚氨酯（PU）掺入钙钛矿前体溶液中来制造具有完全覆盖率和较大晶体尺寸的钙钛矿薄膜，从而既降低了结晶速度又提高了可弯曲性。获得具有致密，微米级晶粒的闪亮，光滑的钙钛矿薄膜，该晶粒具有出色的光电性能。通过将PU掺入钙钛矿前体中制成的PVSC提供了令人印象深刻的18.7％的PCE，几乎没有光电流滞后，并且在环境空气中具有出色的稳定性。更重要的是，弹性体PU添加剂使相邻的钙钛矿晶体之间的晶界交联，形成可有效改善钙钛矿薄膜弯曲性的PU网络。

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  • 来源
    《Advanced Functional Materials》 |2017年第41期|1703061.1-1703061.9|共9页
  • 作者

    Huang Zengqi; Hu Xiaotian; Liu Cong; Tan Licheng; Chen Yiwang;

  • 作者单位

    Nanchang Univ, Coll Chem, 999 Xuefu Ave, Nanchang 330031, Jiangxi, Peoples R China|Nanchang Univ, Inst Polymers, Jiangxi Prov Key Lab New Energy Chem, 999 Xuefu Ave, Nanchang 330031, Jiangxi, Peoples R China;

    Chinese Acad Sci ICCAS, Inst Chem, Key Lab Green Printing, 2 Zhongguancun Beiyi St, Beijing 100190, Peoples R China;

    Nanchang Univ, Coll Chem, 999 Xuefu Ave, Nanchang 330031, Jiangxi, Peoples R China;

    Nanchang Univ, Coll Chem, 999 Xuefu Ave, Nanchang 330031, Jiangxi, Peoples R China|Nanchang Univ, Inst Polymers, Jiangxi Prov Key Lab New Energy Chem, 999 Xuefu Ave, Nanchang 330031, Jiangxi, Peoples R China;

    Nanchang Univ, Coll Chem, 999 Xuefu Ave, Nanchang 330031, Jiangxi, Peoples R China|Nanchang Univ, Inst Polymers, Jiangxi Prov Key Lab New Energy Chem, 999 Xuefu Ave, Nanchang 330031, Jiangxi, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    bendability; crystallization; perovskite; polyurethane; solar cells;

    机译：弯曲性;结晶;钙钛矿;聚氨酯;太阳能电池;

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