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首页> 外文期刊>Advanced energy materials >Propylammonium Chloride Additive for Efficient and Stable FAPbI_3 Perovskite Solar Cells
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Propylammonium Chloride Additive for Efficient and Stable FAPbI_3 Perovskite Solar Cells

机译：丙基氯化铵添加剂高效稳定的FAPBI_3钙钛矿太阳能电池

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摘要

To achieve high efficiency perovskite solar cells (PSCs) based on alpha-phase formamidinium lead iodide (FAPbI(3)), addition of methylammonium chloride (MACl) in the precursor solution is commonly used, mainly because of phase stability and improvement of grain size and crystallinity. However, the instability of MA in the perovskite limits the device long-term stability. In this report, n-propylammonium chloride (PACl) is proposed as an alternative to MACl for more stable and efficient FAPbI(3)-based PSCs. Perovskite grain size is increased after addition of PACl. Unlike the MA cation, the propylammonium cation passivates the grain boundary rather than being incorporated into the perovskite lattice due to larger ionic size, which minimizes the change in bandgap. Carrier lifetime is significantly increased by more than five times from 405 to 2110 ns with the PACl additive with negligible trap-mediated recombination, while only four times longer carrier lifetime is observed by MACl additive. As a result, a power conversion efficiency over 22.2% is achieved by 20 mol% PACl additive, which is one of the best efficiencies among the MA-free and Br-free PSCs. In addition, stability against moisture is much better for PACl than for MACl due to an in situ formed barrier at the bulk perovskite.
机译：为了基于α相甲脒铅（FAPBI（3））来实现高效钙钛矿太阳能电池（PSC），通常采用甲基氯化甲基氯化铵（MAC1），主要是由于相稳定性和晶粒尺寸的改善和结晶度。然而，MA在钙钛矿中的不稳定性限制了装置长期稳定性。在本报告中，提出了N-丙基氯化铵（PACL）作为更稳定和高效的FAPBI（3）的PSC的MAC1的替代方案。加入PACL后钙钛矿粒度增加。与马阳离子不同，丙基铵阳离子钝化晶界，而不是由于较大的离子尺寸掺入钙钛矿晶格中，这使得带隙的变化最小化。载体寿命从405至2110ns的载体寿命显着增加，具有可忽略的陷阱介导的重组，而通过MAC1添加剂观察到持续的载体寿命仅需要四倍倍。结果，通过20摩尔％的PACL添加剂实现了超过22.2％的功率转换效率，这是无马和无BR-FRSC的最佳效率之一。此外，由于在散装钙钛矿处于原位形成的屏障，对PACL的稳定性比PACL更好。

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  • 来源
    《Advanced energy materials》 |2021年第47期|2102538.1-2102538.10|共10页
  • 作者

    Zhang Yong; Li Yan; Zhang Lin; Hu Hanlin; Tang Zikang; Xu Baomin; Park Nam-Gyu;

  • 作者单位

    Southern Univ Sci & Technol Dept Mat Sci & Engn Shenzhen 518055 Peoples R China|Southern Univ Sci & Technol Shenzhen Engn Res & Dev Ctr Flexible Solar Cells Shenzhen 518055 Peoples R China|Sungkyunkwan Univ Sch Chem Engn Suwon 16419 South Korea|Sungkyunkwan Univ Ctr Antibonding Regulated Crystals Suwon 16419 South Korea;

    Southern Univ Sci & Technol Dept Mat Sci & Engn Shenzhen 518055 Peoples R China|Southern Univ Sci & Technol Shenzhen Engn Res & Dev Ctr Flexible Solar Cells Shenzhen 518055 Peoples R China|Univ Macau Inst Appl Phys & Mat Engn Macau 999078 Peoples R China;

    Cent South Univ Sch Phys & Elect Hunan Key Lab Super Microstruct & Ultrafast Proc Changsha 410083 Peoples R China;

    Shenzhen Polytech Hoffman Inst Adv Mat 7098 Liuxian Blvd Shenzhen 518055 Peoples R China;

    Univ Macau Inst Appl Phys & Mat Engn Macau 999078 Peoples R China;

    Southern Univ Sci & Technol Dept Mat Sci & Engn Shenzhen 518055 Peoples R China|Southern Univ Sci & Technol Shenzhen Engn Res & Dev Ctr Flexible Solar Cells Shenzhen 518055 Peoples R China;

    Sungkyunkwan Univ Sch Chem Engn Suwon 16419 South Korea|Sungkyunkwan Univ Ctr Antibonding Regulated Crystals Suwon 16419 South Korea;

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  • 关键词

    additive; high efficiency; perovskite solar cells; propylammonium chloride; stability;

    机译：添加剂;高效率;钙钛矿太阳能电池;氯化铵;稳定性;

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