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Stability and Dark Hysteresis Correlate in NiO-Based Perovskite Solar Cells

机译：NiO基钙钛矿太阳能电池的稳定性和黑暗滞后现象相关

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摘要

In perovskite solar cells (PSCs), the interfaces are a weak link with respect to degradation. Electrochemical reactivity of the perovskite's halides has been reported for both molecular and polymeric hole selective layers (HSLs), and here it is shown that also NiO brings about this decomposition mechanism. Employing NiO as an HSL in p-i-n PSCs with power conversion efficiency (PCE) of 16.8%, noncapacitive hysteresis is found in the dark, which is attributable to the bias-induced degradation of perovskite/NiO interface. The possibility of electrochemically decoupling NiO from the perovskite via the introduction of a buffer layer is explored. Employing a hybrid magnesium-organic interlayer, the noncapacitive hysteresis is entirely suppressed and the device's electrical stability is improved. At the same time, the PCE is improved up to 18% thanks to reduced interfacial charge recombination, which enables more efficient hole collection resulting in higher V-oc and FF.
机译：在钙钛矿太阳能电池（PSC）中，界面是降解方面的薄弱环节。钙钛矿卤化物对分子和聚合物空穴选择层（HSL）的电化学反应都有报道，这里表明NiO也会引起这种分解机理。在功率转换效率（PCE）为16.8％的p-i-n PSC中使用NiO作为HSL，在黑暗中发现了非电容性磁滞现象，这归因于钙钛矿/ NiO界面的偏压诱导降解。探索了通过引入缓冲层使NiO与钙钛矿发生电化学脱偶联的可能性。采用混合镁有机中间层，可以完全抑制非电容性磁滞现象，并改善器件的电稳定性。同时，由于减少了界面电荷的重组，PCE改善了18％，从而可以更有效地收集空穴，从而提高V-oc和FF。

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  • 来源
    《Advanced energy materials》 |2019年第31期|1901642.1-1901642.10|共10页
  • 作者

    Di Girolamo Diego; Matteocci Fabio; Kosasih Felix Utama; Chistiakova Ganna; Zuo Weiwei; Divitini Giorgio; Korte Lars; Ducati Caterina; Di Carlo Aldo; Dini Danilo; Abate Antonio;

  • 作者单位

    Univ Roma La Sapienza, Dept Chem, Piazzale Aldo Moro 5, I-00185 Rome, Italy;

    Univ Roma Tor Vergata, Dept Elect Engn, CHOSE Ctr Hybrid & Organ Solar Energy, Via Politecn 1, I-00133 Rome, Italy;

    Univ Cambridge, Dept Mat Sci & Met, 27 Charles Babbage Rd, Cambridge CB3 0FS, England;

    Helmholtz Zentrum Berlin Mat & Energie GmbH, Inst Silicon Photovolta, Kekulestr 5, D-12489 Berlin, Germany;

    Helmholtz Zentrum Berlin Mat & Energie GmbH, Inst Silicon Photovolta, Kekulestr 5, D-12489 Berlin, Germany;

    Univ Cambridge, Dept Mat Sci & Met, 27 Charles Babbage Rd, Cambridge CB3 0FS, England;

    Helmholtz Zentrum Berlin Mat & Energie GmbH, Inst Silicon Photovolta, Kekulestr 5, D-12489 Berlin, Germany;

    Univ Cambridge, Dept Mat Sci & Met, 27 Charles Babbage Rd, Cambridge CB3 0FS, England;

    Univ Roma Tor Vergata, Dept Elect Engn, CHOSE Ctr Hybrid & Organ Solar Energy, Via Politecn 1, I-00133 Rome, Italy|Natl Univ Sci & Technol NUST MISiS, LASE, Leninskiy Prospect 6, Moscow 119049, Russia;

    Univ Roma La Sapienza, Dept Chem, Piazzale Aldo Moro 5, I-00185 Rome, Italy;

    Helmholtz Zentrum Berlin Mat & Energie GmbH, Inst Silicon Photovolta, Kekulestr 5, D-12489 Berlin, Germany|Fuzhou Univ, Inst Adv Energy Mat, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350002, Fujian, Peoples R China|Univ Naples Federico II, Dept Chem Mat & Prod Engn, Piazzale Tecchio 80, I-80125 Naples, Italy;

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  • 正文语种 eng
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  • 关键词

    hysteresis; interface engineering; NiO; perovskite solar cells; stability;

    机译：滞后;界面工程;NIO;钙钛矿太阳能电池;稳定性;

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