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Stabilization of Precursor Solution and Perovskite Layer by Addition of Sulfur

机译：通过添加硫稳定前体溶液和钙钛矿层

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摘要

Efficient perovskite solar cells (PSCs) are mainly fabricated by a solution coating processes. However, the efficiency of such devices varies significantly with the aging time of the precursor solution used to fabricate them, which includes a mixture of perovskite components, especially methylammonium (MA), and formamidinium (FA) cations. Herein, how the inorganic-organic hybrid perovskite precursor solution of (FAPbI(3))(0.95)(MAPbBr(3))(0.05) degrades over time and how such degradation can be effectively inhibited is reported on, and the associated mechanism of degradation is discussed. Such degradation of the precursor solution is closely related to the loss of MA cations dissolved in the FA solution through the deprotonation of MA to volatile methylamine (CH3NH2). Addition of elemental sulfur (S-8) drastically stabilizes the precursor solution owing to amine-sulfur coordination, without compromising the power conversion efficiency (PCE) of the derived PSCs. Furthermore, sulfur introduced to stabilize the precursor solution results in improved PSC stability.
机译：高效的Perovskite太阳能电池（PSC）主要由溶液涂布方法制造。然而，这种装置的效率随着用于制造它们的前体溶液的老化时间而变化，其包括钙钛矿组分，尤其是甲基铵（MA）和甲脒（FA）阳离子的混合物。在本文中，无机 - 有机杂交钙钛矿前体溶液（Fapbi（3））（0.95）（Mapbbr（3））（0.05）随时间降解，并且如何有效地抑制这种降解，以及相关机制讨论了劣化。前体溶液的这种降解与溶解在FA溶液中的MA阳离子的损失密切相关，所述马来溶解在FA溶液中以挥发甲胺（CH 3 NH 2）。由于胺 - 硫的协调，添加元素硫（S-8）的添加稳定性稳定性溶液，而不会影响衍生的PSC的功率转换效率（PCE）。此外，引入的硫稳定前体溶液导致PSC稳定性改善。

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  • 来源
    《Advanced energy materials》 |2019年第17期|1803476.1-1803476.8|共8页
  • 作者

    Min Hanul; Kim Gwisu; Paik Min Jae; Lee Seungwoon; Yang Woon Seok; Ung Minsu; Seok Sang Il;

  • 作者单位

    UNIST Perovtron Res Ctr Dept Energy Engn Sch Energy & Chem Engn Ulsan 44919 South Korea;

    UNIST Perovtron Res Ctr Dept Energy Engn Sch Energy & Chem Engn Ulsan 44919 South Korea;

    UNIST Perovtron Res Ctr Dept Energy Engn Sch Energy & Chem Engn Ulsan 44919 South Korea;

    UNIST Perovtron Res Ctr Dept Energy Engn Sch Energy & Chem Engn Ulsan 44919 South Korea;

    UNIST Perovtron Res Ctr Dept Energy Engn Sch Energy & Chem Engn Ulsan 44919 South Korea;

    UNIST Perovtron Res Ctr Dept Energy Engn Sch Energy & Chem Engn Ulsan 44919 South Korea;

    UNIST Perovtron Res Ctr Dept Energy Engn Sch Energy & Chem Engn Ulsan 44919 South Korea;

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  • 正文语种 eng
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  • 关键词

    perovskite solar cells; precursor solutions; stabilization; sulfur;

    机译：Perovskite太阳能电池;前体溶液;稳定;硫;

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