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首页> 外文期刊>RSC Advances >Reduced surface defects of organometallic perovskite by thermal annealing for highly efficient perovskite solar cells
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Reduced surface defects of organometallic perovskite by thermal annealing for highly efficient perovskite solar cells

机译：通过热退火减少有机金属钙钛矿的表面缺陷，从而形成高效钙钛矿太阳能电池

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The surface defects of the organometallic perovskite play an important role in the photovoltaic performance of solar cells, which depress the conversion efficiency and cause photocurrent hysteresis. As a key step in fabricating perovskite solar cells, the heating step possibly modifies the surface defects, which in turn leads to the modified device performance. In this context, the surface defects of the organometallic perovskite (CH3NH3PbI3) and their modification by thermal annealing are investigated. It is revealed that the surface defects create electron traps which can be reduced by thermal annealing. Consequently, the perovskite solar cells exhibit improved conversion efficiency from 10.9% to 17.1% with the thermal annealing temperature of the perovskite increasing from 60 degrees C to 130 degrees C. The photocurrent hysteresis of the solar cells is also subdued. This work provides further insights into the function of thermal annealing by modifying surface defects, which also favors the exploration of the perovskite solar cells with high-efficiency and eliminated photocurrent hysteresis.
机译：钙钛矿型有机金属的表面缺陷在太阳能电池的光伏性能中起着重要作用，这会降低转换效率并引起光电流滞后。作为制造钙钛矿太阳能电池的关键步骤，加热步骤可能会改变表面缺陷，进而导致器件性能发生变化。在本文中，研究了有机金属钙钛矿（CH3NH3PbI3）的表面缺陷及其通过热退火的改性。发现表面缺陷产生电子陷阱，该电子陷阱可以通过热退火来减少。因此，随着钙钛矿的热退火温度从60℃增加到130℃，钙钛矿太阳能电池表现出从10.9％提高到17.1％的转化效率。太阳能电池的光电流滞后也得到抑制。这项工作通过修改表面缺陷为热退火的功能提供了进一步的见解，这也有助于探索钙钛矿型太阳能电池的高效率并消除了光电流滞后。

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