Ultrafast laser-annealing of perovskite films for efficient perovskite solar cells,Energy & Environmental Science

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Ultrafast laser-annealing of perovskite films for efficient perovskite solar cells
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2019-11-29 , DOI: 10.1039/c9ee02324k
Peng You _{1,

2,

3,

4} , Guijun Li _{1,

2,

3,

4} , Guanqi Tang _{1,

2,

3,

4} , Jiupeng Cao _{1,

2,

3,

4} , Feng Yan _{1,

2,

3,

4}

Affiliation

Perovskite solar cells have attracted much attention recently for their high efficiency, ease of preparation and low cost. Here, we report a novel laser-annealing method for perovskite films at a low substrate temperature by scanning laser spots on the film surfaces. An ultrafast crystallization process within a few seconds is realized under a laser with a high intensity and a fast scanning speed. Because the crystalline perovskite phase has a stronger light absorption than the amorphous phase, the fast laser annealing can induce a higher temperature in the former and lead to the selective growth of large perovskite grains. Under optimum conditions, perovskite films with high crystallinity are successfully fabricated, resulting in perovskite solar cells with high power conversion efficiency and good stability. Moreover, a faster laser-annealing process of perovskite films is achieved by using a linear laser beam, which is expected to be a promising technique for the mass production of large-scale perovskite solar cells.

中文翻译：

钙钛矿薄膜的超快激光退火，可实现高效钙钛矿太阳能电池

钙钛矿太阳能电池近来以其高效率，易于制备和低成本而备受关注。在这里，我们报告了一种新型的激光退火方法，用于通过扫描膜表面上的激光点在较低的基板温度下对钙钛矿膜进行退火。在具有高强度和快速扫描速度的激光下，可以在几秒钟内实现超快结晶过程。因为结晶钙钛矿相比非晶相具有更强的光吸收性，所以快速的激光退火可以在前者中诱发更高的温度，并导致大钙钛矿晶粒的选择性生长。在最佳条件下，成功地制备了具有高结晶度的钙钛矿薄膜，从而形成了具有高功率转换效率和良好稳定性的钙钛矿太阳能电池。而且，

更新日期：2019-11-29

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