Lead(II) 2-Ethylhexanoate for Simultaneous Modulated Crystallization and Surface Shielding to Boost Perovskite Solar Cell Efficiency and Stability,Advanced Materials

当前位置： X-MOL 学术 › Adv. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Lead(II) 2-Ethylhexanoate for Simultaneous Modulated Crystallization and Surface Shielding to Boost Perovskite Solar Cell Efficiency and Stability
Advanced Materials ( IF 27.4 ) Pub Date : 2023-02-17 , DOI: 10.1002/adma.202211006
Tengteng Yang ₁ , Wangen Zhao ₁ , Yan Yang ₁ , Wenliang Huang ₁ , Kui Zhao ₁ , Shengzhong Frank Liu _{1,

2,

3}

Affiliation

The bulk and surface of a perovskite light-harvesting layer are two pivotal aspects affecting its carrier transport and long-term stability. In this work, lead(II) 2-ethylhexanoate (LDE) is introduced via an antisolvent process into perovskite films to change the reaction kinetics of the crystallization process, resulting in a high-quality perovskite film. Meanwhile, a carboxyl functional group with a long alkyl chain coordinates with the Pb cation, reducing the defect density related to unsaturated Pb atoms. Moreover, the long alkyl chains form a protecting layer at the surface of the perovskite film to prevent chemical attack by water and air, prolonging the lifetime of perovskite devices. Consequently, the assembled device demonstrates a power conversion efficiency (PCE) of 24.84%. Both of the thermal and operational stability are significantly improved due to reduced ion-migration channels.

中文翻译：

用于同步调制结晶和表面屏蔽以提高钙钛矿太阳能电池效率和稳定性的 2-乙基己酸铅 (II)

钙钛矿光捕获层的体积和表面是影响其载流子传输和长期稳定性的两个关键方面。在这项工作中，通过反溶剂工艺将 2-乙基己酸铅 (II) (LDE) 引入钙钛矿薄膜中，以改变结晶过程的反应动力学，从而产生高质量的钙钛矿薄膜。同时，具有长烷基链的羧基官能团与铅阳离子配位，降低了与不饱和铅原子相关的缺陷密度。此外，长烷基链在钙钛矿薄膜表面形成保护层，防止水和空气的化学侵蚀，延长钙钛矿器件的使用寿命。因此，组装后的设备表现出 24.84% 的功率转换效率 (PCE)。

更新日期：2023-02-17

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南