Novel unsymmetrical squaraine-based small molecules for organic solar cells

被引:21
作者
Chen, Yao [1 ,2 ,3 ]
Wang, Gang [2 ,3 ]
Yang, Lin [1 ]
Wu, Jianglin [1 ]
Melkonyan, Ferdinand S. [2 ,3 ]
Huang, Yan [1 ]
Lu, Zhiyun [1 ]
Marks, Tobin J. [1 ,2 ,3 ,4 ]
Facchet, Antonio [2 ,3 ,5 ]
机构
[1] Sichuan Univ, Coll Chem, Key Lab Green Chem & Technol, Minist Educ, Chengdu 610064, Sichuan, Peoples R China
[2] Northwestern Univ, Dept Chem, 2145 Sheridan Rd, Evanston, IL 60208 USA
[3] Northwestern Univ, Argonne Northwestern Solar Energy Res Ctr ANSER, 2145 Sheridan Rd, Evanston, IL 60208 USA
[4] Northwestern Univ, Dept Mat Sci & Engn, 2145 Sheridan Rd, Evanston, IL 60208 USA
[5] Flexterra Inc, 8025 Lamon Ave, Skokie, IL 60077 USA
基金
中国国家自然科学基金;
关键词
OPEN-CIRCUIT VOLTAGE; SOLID-STATE STRUCTURE; BAND-GAP POLYMER; PHOTOVOLTAIC EFFICIENCY; FLUORINE SUBSTITUTION; CARRIER MOBILITY; PERFORMANCE; ACCEPTOR; DONORS; DESIGN;
D O I
10.1039/c7tc04639a
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A new unsymmetrical squaraine dye (USQ) series for organic solar cells (OSC) is synthesized by a simple route without using highly toxic reagents. These USQs exhibit a low bandgap of 1.57 eV and HOMO energies of B similar to -5.2-5.3 eV. Despite the very simple molecular structures, OSC devices based on these USQs exhibit an impressive open-circuit voltage of 0.92 V and power conversion efficiencies (PCEs) approaching 5%, achieved without using any additives or post film deposition treatment. The results indicate that USQs are promising materials for sustainable energy applications.
引用
收藏
页码:847 / 854
页数:8
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