Enhancing Performance and Stability of Perovskite Solar Cells with a Novel Formamidine Group Additive,Small

当前位置： X-MOL 学术 › Small › 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.)

Enhancing Performance and Stability of Perovskite Solar Cells with a Novel Formamidine Group Additive
Small ( IF 13.0 ) Pub Date : 2024-06-06 , DOI: 10.1002/smll.202402557
Jing Zhang ₁ , Yutong She ₁ , Yujie Zhu ₁ , Hang Su _{1,

2} , Xinxin Zheng ₁ , Yuyin Yao ₁ , Deng Li ₁ , Shengzhong (Frank) Liu _{1,

2,

3}

Affiliation

Perovskite materials, particularly FAPbI₃, have emerged as promising candidates for solar energy conversion applications. However, these materials are plagued by well-known defects and suboptimal film quality. Enhancing crystallinity and minimizing defect density are therefore essential steps in the development of high-performance perovskite solar cells. In this study, 1H-Pyrazole-1-carboximidamide hydrochloride (PCH) is introduced into FAPbI₃ perovskite films. The molecular structure of PCH features a pyrazole ring bonded to formamidine (FA). The FA moiety of PCH facilitated the incorporation of this additive into the film lattice, while the negatively charged pyrazole ring effectively passivated positively charged iodine vacancies. The presence of PCH led to the fabrication of an FAPbI₃ device with improved crystallinity, a smoother surface, and reduced defect density, resulting in enhanced V_oc and fill factor. A record power conversion efficiency of 24.62% is achieved, along with exceptional stability under prolonged air exposure and thermal stress. The findings highlight the efficacy of PCH as a novel additive for the development of high-performance perovskite solar cells.

中文翻译：

使用新型甲脒基添加剂提高钙钛矿太阳能电池的性能和稳定性

钙钛矿材料，特别是FAPbI ₃ ，已成为太阳能转换应用的有前途的候选材料。然而，这些材料存在众所周知的缺陷和薄膜质量不佳的问题。因此，提高结晶度和最小化缺陷密度是开发高性能钙钛矿太阳能电池的重要步骤。在这项研究中，1H-吡唑-1-甲酰亚胺盐酸盐（PCH）被引入FAPbI ₃钙钛矿薄膜中。 PCH 的分子结构具有与甲脒 (FA) 键合的吡唑环。 PCH 的 FA 部分促进了该添加剂并入薄膜晶格中，而带负电的吡唑环有效地钝化了带正电的碘空位。 PCH的存在使得FAPbI ₃器件的制造具有改进的结晶度、更光滑的表面和降低的缺陷密度，从而提高了V _oc和填充因子。功率转换效率达到创纪录的 24.62%，并且在长期空气暴露和热应力下具有出色的稳定性。这些发现强调了 PCH 作为开发高性能钙钛矿太阳能电池的新型添加剂的功效。

更新日期：2024-06-06

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