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Planar perovskite solar cells with long-term stability using ionic liquid additives

机译：Planar Perovskite太阳能电池，具有使用离子液体添加剂的长期稳定性

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摘要

Solar cells based on metal halide perovskites are one of the most promising photovoltaic technologies(1-4). Over the past few years, the long-term operational stability of such devices has been greatly improved by tuning the composition of the perovskites(5-9), optimizing the interfaces within the device structures(10-13), and using new encapsulation techniques(14,15). However, further improvements are required in order to deliver a longer-lasting technology. Ion migration in the perovskite active layer-especially under illumination and heat-is arguably the most difficult aspect to mitigate(16-18). Here we incorporate ionic liquids into the perovskite film and thence into positive-intrinsic-negative photovoltaic devices, increasing the device efficiency and markedly improving the long-term device stability. Specifically, we observe a degradation in performance of only around five per cent for the most stable encapsulated device under continuous simulated full-spectrum sunlight for more than 1,800 hours at 70 to 75 degrees Celsius, and estimate that the time required for the device to drop to eighty per cent of its peak performance is about 5,200 hours. Our demonstration of long-term operational, stable solar cells under intense conditions is a key step towards a reliable perovskite photovoltaic technology.
机译：基于金属卤化物Perovskites的太阳能电池是最有前途的光伏技术（1-4）之一。在过去几年中，通过调整钙钛矿的组成（5-9），优化装置结构（10-13）内的接口，并使用新的封装技术，从而大大改善了这种装置的长期操作稳定性。 （14,15）。但是，需要进一步改进以提供更长持久的技术。在钙钛矿活性层中的离子迁移 - 尤其是在照明和热量下可以说是减轻（16-18）的最困难的方面。在这里，我们将离子液体掺入钙钛矿膜中，然后进入正固着阴性光伏器件，增加了器件效率并显着提高了长期装置的稳定性。具体而言，我们在连续模拟全频谱阳光下的最稳定的封装装置的性能下观察到的性能下降约为5％，在70至75摄氏度下超过1,800小时，并估计设备掉落所需的时间百分之八十百分之八十次左右约5200小时。我们在强烈条件下的长期运行，稳定的太阳能电池的演示是朝着可靠的钙钛矿光伏技术的关键步骤。

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  • 来源
    《Nature》 |2019年第7764期|245-250|共6页
  • 作者

    Bai Sai; Da Peimei; Li Cheng; Wang Zhiping; Yuan Zhongcheng; Fu Fan; Kawecki Maciej; Liu Xianjie; Sakai Nobuya; Wang Jacob Tse-Wei; Huettner Sven; Buecheler Stephan; Fahlman Mats; Gao Feng; Snaith Henry J.;

  • 作者单位

    Univ Oxford Clarendon Lab Oxford England|Linkoping Univ Dept Phys Chem & Biol IFM Linkoping Sweden;

    Univ Oxford Clarendon Lab Oxford England;

    Univ Bayreuth Dept Chem Bayreuth Germany|Xiamen Univ Sch Elect Sci & Engn Xiamen Fujian Peoples R China;

    Univ Oxford Clarendon Lab Oxford England;

    Linkoping Univ Dept Phys Chem & Biol IFM Linkoping Sweden;

    Empa Lab Nanoscale Mat Sci Dubendorf Switzerland|Univ Basel Dept Phys Basel Switzerland;

    Linkoping Univ Dept Phys Chem & Biol IFM Linkoping Sweden;

    Univ Oxford Clarendon Lab Oxford England;

    CSIRO Energy Mayfield West NSW Australia;

    Univ Bayreuth Dept Chem Bayreuth Germany;

    Empa Swiss Fed Labs Mat Sci & Technol Lab Thin Films & Photovolta Dubendorf Switzerland;

    Linkoping Univ Dept Phys Chem & Biol IFM Linkoping Sweden;

    Univ Oxford Clarendon Lab Oxford England|Linkoping Univ Dept Phys Chem & Biol IFM Linkoping Sweden;

    Univ Oxford Clarendon Lab Oxford England;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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