Hydrophobic Fluorinated Conjugated Polymer as a Multifunctional Interlayer for High-Performance Perovskite Solar Cells,ACS Photonics

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Hydrophobic Fluorinated Conjugated Polymer as a Multifunctional Interlayer for High-Performance Perovskite Solar Cells
ACS Photonics ( IF 6.5 ) Pub Date : 2021-10-26 , DOI: 10.1021/acsphotonics.1c00939
Yahong Li ₁ , Eng Liang Lim ₁ , Haibing Xie ₁ , Jing Song ₁ , Tengfei Kong ₁ , Yang Zhang ₁ , Mingqun Yang ₂ , Baoqi Wu ₂ , Chunhui Duan ₂ , Dongqin Bi ₁

Affiliation

It is known that the perovskite/hole transport layer (HTL) interface is a great limit to achieving high-performance perovskite solar cells (PSCs). Aiming to solve this problem, we introduce a naphthalene diimide (NDI)-based conjugated polymer bearing 3,4-difluorothiophene (PTzNDI-2FT) at the perovskite/HTL interface. We find that the PTzNDI-2FT interlayer combines multifunctions to passivate surface defects on the perovskite film, improve charge transport at the perovskite/HTL interface, and prevent penetration of the moisture and organic ion volatilization in the perovskite film. The champion device exhibits a power conversion efficiency of 23.2% under standard AM 1.5 G one sun illumination and offers excellent environmental, heat, and light stabilities.

中文翻译：

疏水性氟化共轭聚合物作为高性能钙钛矿太阳能电池的多功能中间层

众所周知，钙钛矿/空穴传输层（HTL）界面是实现高性能钙钛矿太阳能电池（PSC）的一大限制。为了解决这个问题，我们在钙钛矿/HTL 界面引入了一种基于萘二亚胺 (NDI) 的共轭聚合物，其带有 3,4-二氟噻吩 (PTzNDI-2FT)。我们发现 PTzNDI-2FT 夹层结合了多种功能来钝化钙钛矿薄膜上的表面缺陷，改善钙钛矿/HTL 界面的电荷传输，并防止钙钛矿薄膜中水分和有机离子挥发的渗透。冠军设备在标准 AM 1.5 G 单次阳光照射下的功率转换效率为 23.2%，并具有出色的环境、热和光稳定性。

更新日期：2021-11-17

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