直接纳米晶籽晶可实现FAPbI3太阳能电池的埋入界面钝化和增强结晶
{"_":"Direct Nanocrystal Seeding Enables Buried Interface Passivation and Enhanced Crystallization for FAPbI Solar Cells.","sub":["3"]}
摘要(中文译文)
基于FAPbI的钙钛矿因其接近理想的光学带隙而被视为有前景的吸收层材料。然而，FAPbI的晶格应变和本征相不稳定性常常产生严重的界面缺陷，这些缺陷充当非辐射复合中心，从而限制了器件性能和稳定性。本文展示了一种简便有效的策略，即直接将CsPbBr纳米晶（NCs）共混到前驱体溶液中。这一简单添加实现了结晶调控与缺陷钝化的同步进行。准原位监测表明，引入的CsPbBr NCs发生部分离子化，导致未溶解的NCs作为种子用于自下而上的结晶控制，而离子化物种则特别钝化埋底界面，二者共存。这促成了高质量且稳定的钙钛矿薄膜的制备。相应的太阳能电池实现了24.63%的最高功率转换效率，显著优于对照器件（22.89%）以及使用等浓度CsBr和PbBr的器件（23.68%）。此外，封装器件在光照下连续最大功率点跟踪1000小时后仍保持其初始效率的80%以上。
Abstract
FAPbI-based perovskites are regarded as promising absorber materials owing to their near-ideal optical bandgap. However, lattice strain and intrinsic phase instability of FAPbI often generate severe interfacial defects, which act as nonradiative recombination. This consequently limits device performance and stability. Herein, a facile and effective strategy is demonstrated by directly blending CsPbBr nanocrystals (NCs) into the precursor solution. This simple addition achieves the simultaneous modulation of crystallization and defect passivation. Quasi-in-situ monitoring reveals that the introduced CsPbBr NCs partially ionize, leading to the coexistence of undissolved NCs acting as seeds for bottom-up crystallization control and ionized species that particularly passivate the buried interface. This results in the production of high-quality and stable perovskite films. Corresponding solar cells deliver a champion power conversion efficiency of 24.63%, significantly outperforming control devices (22.89%) and those with equivalent concentrations of CsBr and PbBr (23.68%). Moreover, the encapsulated devices retain over 80% of their initial efficiency after 1000 h of continuous maximum power point tracking under illumination.
如何引用
AMA
Chenyuan Shang, Fangzhou Liu, Cuncun Wu, Yan Guan, Xian Zhang, Xiaolong Li, et al. {"_":"Direct Nanocrystal Seeding Enables Buried Interface Passivation and Enhanced Crystallization for FAPbI Solar Cells.","sub":["3"]}. Small (Weinheim an der Bergstrasse, Germany). 2026; doi:10.1002/smll.74279.
APA
Chenyuan Shang, Fangzhou Liu, Cuncun Wu, Yan Guan, Xian Zhang, Xiaolong Li, et al (2026). {"_":"Direct Nanocrystal Seeding Enables Buried Interface Passivation and Enhanced Crystallization for FAPbI Solar Cells.","sub":["3"]}. Small (Weinheim an der Bergstrasse, Germany). https://doi.org/10.1002/smll.74279
GB/T 7714
Chenyuan Shang, Fangzhou Liu, Cuncun Wu, Yan Guan, Xian Zhang, Xiaolong Li, et al. {"_":"Direct Nanocrystal Seeding Enables Buried Interface Passivation and Enhanced Crystallization for FAPbI Solar Cells.","sub":["3"]}[J]. Small (Weinheim an der Bergstrasse, Germany), 2026 doi:10.1002/smll.74279.
在 PubMed增强版 阅读全文
翻译全文 · AI 文献问答 · PDF 原文下载 · 引用导出