期刊
ADVANCED FUNCTIONAL MATERIALS
卷 31, 期 35, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202103847
关键词
anchoring based self-assembly; bonding strength; hole transporting materials; monolayer; perovskite solar cells
类别
资金
- National Natural Science Foundation of China [21822504, 21706070]
- Shanghai Municipal Science and Technology Major Project [2018SHZDZX03]
- Programmer of Introducing Talents of Discipline to Universities [B16017]
- Shanghai Science and Technology Committee [17ZR1407400]
- China Association of Science and Technology [2017QNRC001]
- [TP2016018]
Anchoring-based self-assembly using strong anchoring groups can improve the assembly rate, density, and compactness of monolayers for perovskite solar cells, leading to enhanced charge collection and suppressed interfacial recombination. Prototype PSCs based on optimal monolayers achieved a high PCE of 21.43% and maintained 90% of initial PCE after three months, demonstrating the practical utility of the ASA strategy for scaling-up.
Anchoring-based self-assembly (ASA) has emerged as a material-saving and highly scalable strategy to fabricate charge-transporting monolayers for perovskite solar cells (PSCs). However, the interfacial hole-extraction and electron-blocking performances are highly dependent on the compactness of the ASA monolayers, which has been largely ignored though it is very crucial to the efficiency and stability of PSCs. Here, strategically designed hole-transporting molecules with different anchoring groups are incorporated to investigate the effect of bonding strength on monolayer quality and correlate these with the performance of p-i-n structured PSCs. It is unraveled that the anchoring groups with a stronger bonding strength are advantageous for improving the assembly rate, density, and compactness of ASA monolayer, thus enhancing charge collection and suppressing interfacial recombination. The prototypical PSCs based on optimal ASA monolayer achieve a high power conversion efficiency (PCE) of 21.43% (0.09 cm(2)). More encouragingly, when enlarging the device area by tenfold, a comparable PCE of 20.09% (1.0 cm(2)) can be obtained, suggesting that the ASA strategy is practically useful for scaling-up. The robust anchoring of the ASA monolayer also enhances devices stability, retaining 90% of initial PCE after three months. This study provides important insights into the ASA charge-transporting monolayers for efficient and stable PSCs.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据