All-in-One Lewis Base for Enhanced Precursor and Device Stability in Highly Efficient Perovskite Solar Cells,ACS Energy Letters

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All-in-One Lewis Base for Enhanced Precursor and Device Stability in Highly Efficient Perovskite Solar Cells
ACS Energy Letters ( IF 19.3 ) Pub Date : 2021-09-03 , DOI: 10.1021/acsenergylett.1c01465
Jun Zhu ₁ , Dong Hoe Kim _{2,

3} , Ji Dong Kim ₂ , Dong Geon Lee ₄ , Won Bin Kim ₄ , Shi wang Chen ₄ , Jun Young Kim ₄ , Jae Myeong Lee ₄ , Hyemin Lee ₂ , Gill Sang Han ₄ , Tae Kyu Ahn ₁ , Hyun Suk Jung ₄

Affiliation

With skyrocketing interest and achievement of tremendous research efforts, perovskite solar cells are on the verge of commercialization. However, the stabilities of precursors and devices provide challenges for commercialization. Many researchers have dealt with these issues separately. Here, we introduce novel diphthalic anhydride-based Lewis base additives that address the precursor and device stability difficulties simultaneously. The added Lewis bases showed excellent interactions with Pb²⁺ and FA⁺ cations in the precursor and perovskite crystal. Accordingly, the facile Lewis-base-added perovskite precursor exhibited 85% ambient storage stability, and the device retained 90% of its initial efficiency after 1,000 h of heating at 80 °C (thermal) or 50% relative humidity atmospheric testing without encapsulation. Furthermore, the interaction between the facile Lewis base and various cations suppressed the related grain boundary defects, thus improving the efficiency from 19.58% of the control device to 22.43% of the target device.

中文翻译：

用于增强高效钙钛矿太阳能电池前驱体和器件稳定性的多合一路易斯碱

随着人们对钙钛矿太阳能电池的兴趣和巨大研究成果的飞速增长，它正处于商业化的边缘。然而，前体和设备的稳定性为商业化带来了挑战。许多研究人员分别处理了这些问题。在这里，我们介绍了新型的基于双邻苯二甲酸酐的路易斯碱添加剂，可同时解决前体和器件稳定性难题。添加的路易斯碱与 Pb ²⁺和 FA ⁺显示出极好的相互作用前体和钙钛矿晶体中的阳离子。因此，简单的添加路易斯碱的钙钛矿前体表现出 85% 的环境储存稳定性，并且该器件在 80°C（热）或 50% 相对湿度大气测试下加热 1,000 小时后保持其初始效率的 90%，无需封装。此外，易路易斯碱与各种阳离子之间的相互作用抑制了相关的晶界缺陷，从而将效率从控制装置的 19.58% 提高到目标装置的 22.43%。

更新日期：2021-10-08

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