首页> 外文期刊>Advanced Functional Materials >Tailoring Crystal Structure of FA_(0.83)Cs_(0.17)Pbl_3 Perovskite Through Cuanidinium Doping for Enhanced Performance and Tunable Hysteresis of Planar Perovskite Solar Cells
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Tailoring Crystal Structure of FA_(0.83)Cs_(0.17)Pbl_3 Perovskite Through Cuanidinium Doping for Enhanced Performance and Tunable Hysteresis of Planar Perovskite Solar Cells

机译:通过铜掺杂调整FA_(0.83)Cs_(0.17)Pbl_3钙钛矿的晶体结构以提高平面钙钛矿太阳能电池的性能和可调节滞后性

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摘要

Current-voltage hysteresis of perovskite solar cells (PSCs) has raised the concern of accurate performance measurement in practice. Although various theories have been proposed to elucidate this phenomenon, the origin of hysteresis is still an open question. Herein, the use of guanidinium cation (Gu(+))-dopant is demonstrated to tailor the crystal structure of mixed-cation formamidinium-cesium lead triiodide (FA(0.83)Cs(0.17)PbI(3)) perovskite, resulting in an improved energy conversion efficiency and tunable current-voltage hysteresis characteristic in planar solar cells. Particularly, when the concentration of Gu-dopant for the perovskite film increases, the normal hysteresis initially observed in the pristine PSC is first suppressed with 2%-Gu-dopant, then changed to inverted hysteresis with a higher Gu-dopant. The hysteresis tunability behavior is attributed to the interplay of charge/ion accumulation and recombination at interfaces in the PSC. Furthermore, compared to the cell without Gu(+)-dopant, the optimal content of 2% Gu(+)-dopant also increases the device efficiency by 14%, reaching over 17% under one sun illumination.
机译:钙钛矿太阳能电池(PSC)的电流-电压磁滞已引起人们对实际性能测量的关注。尽管提出了各种理论来阐明这种现象,但是磁滞的起源仍然是一个悬而未决的问题。在这里,已证明使用胍阳离子(Gu(+))-掺杂剂可以定制混合阳离子甲ami-铯三碘化铅(FA(0.83)Cs(0.17)PbI(3))钙钛矿的晶体结构。改进了平面太阳能电池的能量转换效率和可调的电流-电压磁滞特性。特别地,当钙钛矿膜的Gu-掺杂剂的浓度增加时,最初在原始PSC中观察到的正常磁滞首先被2%-Gu-掺杂剂抑制,然后变为具有更高的Gu-掺杂剂的反向磁滞。磁滞可调谐性行为归因于PSC界面处电荷/离子累积和重组的相互作用。此外,与不添加Gu(+)掺杂剂的电池相比,添加2%Gu(+)掺杂剂的最佳含量还可将器件效率提高14%,在一次阳光照射下可达到17%以上。

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  • 来源
    《Advanced Functional Materials》 |2019年第1期|1806479.1-1806479.10|共10页
  • 作者单位

    Queensland Univ Technol, Sch Chem Phys & Mech Engn, Fac Sci & Engn, Brisbane, Qld 4001, Australia;

    Queensland Univ Technol, Sch Chem Phys & Mech Engn, Fac Sci & Engn, Brisbane, Qld 4001, Australia;

    Queensland Univ Technol, Sch Chem Phys & Mech Engn, Fac Sci & Engn, Brisbane, Qld 4001, Australia;

    Queensland Univ Technol, Sch Chem Phys & Mech Engn, Fac Sci & Engn, Brisbane, Qld 4001, Australia;

    Queensland Univ Technol, Sch Chem Phys & Mech Engn, Fac Sci & Engn, Brisbane, Qld 4001, Australia;

    Univ Jaume 1, Inst Adv Mat INAM, Castellon de La Plana 12006, Spain;

    Univ Jaume 1, Inst Adv Mat INAM, Castellon de La Plana 12006, Spain;

    Univ Queensland, Sch Chem & Mol Sci, St Lucia, Qld 4072, Australia;

    Queensland Univ Technol, Sch Chem Phys & Mech Engn, Fac Sci & Engn, Brisbane, Qld 4001, Australia;

    CSIRO Energy, Mayfield West, NSW 2304, Australia;

    Queensland Univ Technol, Sch Chem Phys & Mech Engn, Fac Sci & Engn, Brisbane, Qld 4001, Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    band energy alignment; efficiency enhancement; guanidinium ion doping; perovskite solar cells; tunable hysteresis;

    机译:带能对准;效率增强;胍鎓离子掺杂;钙钛矿太阳能电池;可调谐磁滞;

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