Enhancing Perovskite Solar Cell Performance through Femtosecond Laser Polishing,Solar RRL

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Enhancing Perovskite Solar Cell Performance through Femtosecond Laser Polishing
Solar RRL ( IF 6.0 ) Pub Date : 2020-05-20 , DOI: 10.1002/solr.202000189
Wenchi Kong _{1,

2} , Chen Zhao _{1,

2} , Jun Xing _{1,

2} , Yuting Zou _{1,

2} , Tao Huang _{1,

2} , Feng Li ₃ , Jianjun Yang ₁ , Weili Yu ₁ , Chunlei Guo _{1,

4}

Affiliation

Nonradiative recombination loss is a key process that determines the performance of perovskite solar cells, and how to control it is significant for the research and development of perovskites. Generally, traditional chemical modification/passivation methods are complicated and prone to secondary contamination. Herein, femtosecond (fs) laser polishing as a promising technique is demonstrated to ameliorate the surface of perovskite films, reduce nonradiative recombination loss, and improve solar cell performance. The high‐intensity fs laser pulses can remove around 20 nm‐thick perovskite top layer through an ionization process, help to decrease the grain boundary density, and enlarge the grain size of perovskite films after recrystallization. It is believed that fs laser polishing is a time‐effective and highly precise technique that is suitable for large‐scale device production, thus will trigger more applications in optoelectronics.

中文翻译：

通过飞秒激光抛光提高钙钛矿太阳能电池的性能

非辐射复合损失是决定钙钛矿太阳能电池性能以及控制钙钛矿太阳能电池性能的关键过程。通常，传统的化学修饰/钝化方法很复杂，容易产生二次污染。在本文中，飞秒（fs）激光抛光被证明是一种有前途的技术，可以改善钙钛矿薄膜的表面，减少非辐射复合损失并提高太阳能电池的性能。高强度fs激光脉冲可通过电离过程去除大约20 nm厚的钙钛矿顶层，有助于降低晶界密度，并在重结晶后增大钙钛矿膜的晶粒尺寸。

更新日期：2020-05-20

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