中文版 | English
CSpace
Volatile Additive Strategy Triggering 17.48% Efficient Post-Treatment-Free Organic Solar Cells
Zhang, Guangquan1,2; Hu, Dingqin1,2,3; Tang, Hua1,2; Song, Hang1,2; Duan, Shengnan4; Kan, Zhipeng5; Lu, Shirong1,2,6
2022-12-25
摘要Active layer morphology is critical to determine the photovoltaic performance of organic solar cells (OSCs), and additive-assisted morphology optimization is one of the most widely used strategies to fine tune the donor-acceptor network in the active layer. However, the postprocessing procedures and additive residues require additional efforts to maintain the device performance. Herein, a low-cost, simple structural design and volatile solid additive 2,5-diiodothiophene is demonstrated to effectively optimize the active layer morphology and prompt the photoelectric conversion efficiency (PCE) of OSCs without any post-treatment, outperforming the devices fabricated with the prototypical volatile additive 1,4-diiodobenzene. The 2,5-diiodothiophene (DIT)-optimized PM6:Y6 binary OSCs obtain a PCE of 17.48%, accompanied with reduced trap-assisted charge recombination and balanced charge carrier mobility. In addition, we notice that the bromide and chlorine analogues of DIT can enhance the device performance to a certain extent as well. The findings suggest that the post-treatment-free nature of the thiophene-based processing additives are promising candidates for tuning the active layer morphology, providing simple processability for large-scale fabrication of OSCs.
关键词nonfullerene acceptors organic solar cells post-treatment free processes volatilizable additives
DOI10.1002/solr.202200994
发表期刊SOLAR RRL
ISSN2367-198X
页码7
通讯作者Hu, Dingqin(hudingqin@cigit.ac.cn) ; Lu, Shirong(lushirong@cigit.ac.cn)
收录类别SCI
WOS记录号WOS:000903698100001
语种英语