Facile Method of Solvent-Flushing To Building Component Distribution within Photoactive Layers for High-Performance Organic Solar Cells

被引:10
作者
Zeng, Rui [2 ]
Du, Shuxian [2 ]
Gong, Yongshuai [1 ]
Bai, Yiming [2 ]
Hu, Siqian [3 ]
Hayat, Tasawar [4 ]
Alsaedi, Ahmed [4 ]
Tan, Zhan'ao [1 ]
机构
[1] Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Enginec, Beijing 100029, Peoples R China
[2] North China Elect Power Univ, State Key Lab Alternate Elect Power Syst Renewabl, Beijing 102206, Peoples R China
[3] Jianghan Univ, Minist Educ, Key Lab Optoelect Chem Mat & Devices, Wuhan 430056, Peoples R China
[4] King Abdulaziz Univ, Fac Sci, NAAM Res Grp, Jeddah 21589, Saudi Arabia
基金
中国国家自然科学基金;
关键词
organic solar cell; concentration distribution; charge transport; solvent flushing; photoactive layer; PROCESSED TITANIUM CHELATE; BUFFER LAYER; POLYMER; FULLERENE; MORPHOLOGY; EFFICIENCY; BLEND; FILMS;
D O I
10.1021/acsami.0c07173
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Suitable donor and acceptor distribution in the blended photoactive layer benefits the charge transfer and exciton separation to boost the performance of organic solar cells (OSCs). Herein, we propose a universal solvent-flushing method for building component distribution in photoactive layers based on the different solubilities of the donor and acceptor in acetylacetone (Acac). The donor and acceptor concentration distribution through the photoactive layers is investigated by the time-of-flight secondary-ion mass spectroscopy, and the surface concentration changes are examined by contact angle measurements and atomic force microscopy tests. The charge-transfer properties of OSCs before and after Acac flushing are further investigated by the rectification ratio and light intensity-dependent J(sc) and V-oc, measurements. For inverted OSCs based on PBDB-TF:IT-4F, the power conversion efficiency (PCE) enhances from 12.87 to 14.05%, and for a PBDB-TF:Y6-based device, the PCE also significantly increases from 15.40 to 16.51% because of greatly enhanced J(sc) and FF, benefited from enhanced charge transport and suppressed charge recombination by solvent-flushing. Our findings suggest that solvent-flushing is a simply processed and easily controlled method to achieve vertical component distribution in photoactive layers to boost the performance of OSCs.
引用
收藏
页码:31459 / 31466
页数:8
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