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首页> 外文期刊>RSC Advances >Efficient promotion of charge separation and suppression of charge recombination by blending PCBM and its dimer as electron transport layer in inverted perovskite solar cells
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Efficient promotion of charge separation and suppression of charge recombination by blending PCBM and its dimer as electron transport layer in inverted perovskite solar cells

机译：通过将PCBM及其二聚体混合作为倒钙钛矿太阳能电池中的电子传输层，有效促进电荷分离和抑制电荷重组

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Organic–inorganic hybrid perovskite solar cells have achieved great success in recent years. Meanwhile, inverted structured device is an important branch in perovskite photovoltaics owing to its peculiar advantages of low-temperature fabrication process and non-hysteresis behavior. In this kind of device, the electron transport material, as well as the interface between perovskite and electron transport layer (ETL), plays a crucial role in photoelectric conversion process. We report that the utilization of the fullerene derivative blend, PCBM and its dumb-belled dimer, as electron transport material in inverted perovskite solar cells, which could significantly enhance the photovoltaic performances. The morphology of ETL can be regulated by changing the admixing ratio of PCBM and its dimer. Moreover, the steady-state/time-resolved fluorescence and transient photovoltage decay measurements indicate that the optimization of perovskite/ETL interface through an appropriate fullerene blend is beneficial to promote charge separation and suppress charge recombination.
机译：有机无机杂交钙钛矿太阳能电池近年来取得了巨大的成功。同时，倒置结构装置是由于其低温制造工艺和非滞后行为的特殊优点而成为钙钛矿光伏的重要分支。在这种装置中，电子传输材料以及钙钛矿和电子传输层（EtL）之间的界面在光电转换过程中起着至关重要的作用。我们认为，利用富勒烯衍生物共混物，PCBM及其哑铃二聚体，作为倒钙钛矿太阳能电池中的电子传输材料，这可以显着提高光伏性能。通过改变PCBM及其二聚体的混合比来调节ETL的形态。此外，稳态/时间分辨荧光和瞬态光电衰减测量表明，通过适当的富勒烯共混物优化钙钛矿/ EtL界面有利于促进电荷分离和抑制电荷重组。

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