Three-dimensional tetra(oligothienyl)silanes as donor material for organic solar cells

被引:99
作者
Roquet, Sophie [1 ]
de Bettignies, Remi [1 ]
Leriche, Philippe [1 ]
Cravino, Antonio [1 ]
Roncali, Jean [1 ]
机构
[1] Univ Angers, Grp Syst Conjugues Lineaires, CIMMA, CNRS,UMR 6200, F-49045 Angers, France
关键词
D O I
10.1039/b604261a
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Tetrahedral conjugated systems involving four conjugated oligothiophene chains fixed onto a central silicon node (1, 2) have been synthesized and used as donor materials in hetero-junction solar cells. Bilayer solar cells have been realized by thermal evaporation of compounds 1 and 2 as donors and N,N'-bis-tridecylperylenedicarboxyimide as an acceptor. Comparison of the performances of these devices to those of a reference system based on dihexylterthienyl (H3T) shows that despite comparable effective conjugation lengths, the 3D compounds 1 and 2 lead to a power conversion efficiency four-five times higher, suggesting better absorption of the incident light and better hole transport properties. Whereas fabrication of bulk hetero-junction with H3T was prevented by the lack of film forming properties, a prototype bulk hetero-junction based on compound 2 as the donor and [6,6]-phenyl-C-61-butyric acid methyl ester (PCBM) as the acceptor has been realized. A short-circuit current density of 1.13 mA cm(-2) and a power conversion efficiency of 0.30% has been measured under AM 1.5 simulated solar irradiation at 80 mW cm(-2).
引用
收藏
页码:3040 / 3045
页数:6
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