4.7 Article

Perylene-Based Conjugated Polymers for Efficient and Stable Perovskite Solar Cells: The Superior Role of the Alkyl Side Chain over Oligo(ethylene glycol)

期刊

MACROMOLECULES
卷 56, 期 17, 页码 6712-6721

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acs.macromol.3c01021

关键词

-

向作者/读者索取更多资源

Two high HOMO energy level hole-transporting conjugated polymers, p-NP-E-BOC6-E and p-NP-E-BO2EG-E, were synthesized through direct arylation polymerization. The presence of the (2-methoxyethoxy)ethoxy side chain in p-NP-E-BOC6-E results in higher hole mobility, while hexyloxy in p-NP-E-BO2EG-E leads to higher hole density and enhanced conductivity. Both polymers exhibited hole density-dependent mobility and conductivity. When used as the hole transport layer in perovskite solar cells, p-NP-E-BOC6-E demonstrated higher efficiency and better operational and storage stability compared to p-NP-E-BO2EG-E.
We synthesized two high HOMO energy level hole-transporting conjugated polymers, p-NP-E-BOC6-E and p-NP-E-BO2EG-E, through direct arylation polymerization. Copolymerization of 3,10-dibromo-1-(2-octyldodecyl)-1H-phenanthro[1,10,9,8-cdefg]carbazole with either 5,5 & PRIME;-(2,5-bis(hexyloxy)-1,4-phenylene)bis(3,4-ethylenedioxythiophene) or 5,5 & PRIME;-(2,5-bis(2-(2-methoxyethoxy)ethoxy)-1,4-phenylene)bis(3,4-ethylenedioxythiophene) yields the desired polymers. The presence of the (2-methoxyethoxy)ethoxy side chain, offering enhanced flexibility, results in higher hole mobility at the same hole density, probably due to a reduced p-p stacking distance within the conjugated backbone. Hexyloxy, exhibiting a stronger electron-donating ability than 2-methoxyethoxy-ethoxy, leads to higher hole density and enhanced conductivity under identical processing conditions. Moreover, both polymers display hole density-dependent mobility and conductivity. Notably, p-NP-E-BOC6-E exhibits a higher glass transition temperature and lower diffusion coefficient for external species, including 4-tert-butylpyridinium, bis(trifluoromethanesulfonyl)imide, HI, and H2O. When employed as the p-doped hole transport layer in perovskite solar cells, p-NP-E-BOC6-E achieves an average efficiency of 21.6%, while p-NP-E-BO2EG-E reaches 20.4%. Remarkably, p-NP-E-BOC6-E demonstrates improved long-term operational stability and storage stability at 85 & DEG;C compared to p-NP-E-BO2EG-E. These findings emphasize the superior role of alkyl groups over oligo(ethylene glycol) in designing hole-transporting conjugated polymers for perovskite solar cells.

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。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据