Impact of the alkyl side chain position on the photovoltaic properties of solution-processable organic molecule donor materials

被引:8
作者
Zhang, J. [1 ]
Zhu, X. W. [2 ]
He, C. [3 ]
Bin, H. J. [3 ]
Xue, L. W. [3 ]
Wang, W. G. [3 ]
Yang, Y. K. [3 ]
Yuan, N. Y. [1 ]
Ding, J. N. [1 ]
Wei, Z. X. [2 ]
Zhang, Z. -G. [3 ]
Li, Y. F. [3 ]
机构
[1] Changzhou Univ, Sch Mat Sci & Engn, Jiangsu Collaborat Innovat Ctr Photovolta Sci & E, Changzhou 213164, Jiangsu, Peoples R China
[2] Natl Ctr Nanosci & Technol, Beijing 100190, Peoples R China
[3] Chinese Acad Sci, Beijing Natl Lab Mol Sci, CAS Key Lab Organ Solids, Inst Chem, Beijing 100190, Peoples R China
基金
中国博士后科学基金; 中国国家自然科学基金;
关键词
POLYMER SOLAR-CELLS; LOW-BAND-GAP; ELECTRON-ACCEPTOR; HYBRID SYSTEMS; PERFORMANCE; EFFICIENCY; OLIGOTHIOPHENE; COPOLYMERS; SERIES; RING;
D O I
10.1039/c6ta03695c
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
Two new A-D-A structured organic molecules with bithienyl-substituted benzodithiophene (BDT) as the core and donor unit, indenedione (ID) as the end group and acceptor unit, 3,3 ''-dihexyl-2,2':5',2 ''-terthiophene (3T(3-Hex)) or 4,4 ''-dihexyl-2,2':5',2 ''-terthiophene (3T(4-Hex)) as the pi bridge, BDT-3T(3-Hex)-ID and BDT-3T(4-Hex)-ID, were designed and synthesized. The two compounds with the alkyl side chains at different positions in the pi bridge backbone which are applied in solution-processable organic solar cells (OSCs) as donor materials have the same molecular weight and a similar structure, but exhibit different optical and photovoltaic properties. The BDT-3T(4-Hex)-ID film shows a broad absorption band from 400 nm to 750 nm with an absorption peak about 20 nm red-shifted compared to that of BDT-3T( 3-Hex)-ID in solution, benefitting from the outward alkyl side chain in its structure. The power conversion efficiency (PCE) of the solution-processed OSC based on a blend of BDT-3T(4-Hex)-ID and PC71BM (1.25 : 1, w/w) reached 6.55% with a J(sc) of 10.54 mA cm(-2), a V-oc of 0.87 V and a FF of 71.4%, under the illumination of AM 1.5, 100 mW cm(-2). In comparison, the PCE of the OSC based on BDT-3T( 3-Hex)-ID as the donor is 1.06% under the same experimental conditions.
引用
收藏
页码:11747 / 11753
页数:7
相关论文
共 55 条
[1]  
[Anonymous], J AM CHEM SOC
[2]   Impact of the Alkyl Side Chains on the Optoelectronic Properties of a Series of Photovoltaic Low-Band-Gap Copolymers [J].
Biniek, Laure ;
Fall, Sadiara ;
Chochos, Christos L. ;
Anokhin, Denis V. ;
Ivanov, Dimitri A. ;
Leclerc, Nicolas ;
Leveque, Patrick ;
Heiser, Thomas .
MACROMOLECULES, 2010, 43 (23) :9779-9786
[3]  
Boese R, 1999, ANGEW CHEM INT EDIT, V38, P988, DOI 10.1002/(SICI)1521-3773(19990401)38:7<988::AID-ANIE988>3.0.CO
[4]  
2-0
[5]   Linear Side Chains in Benzo[1,2-b:4,5-b′]dithiophene-Thieno[3,4-c]pyrrole-4,6-dione Polymers Direct Self-Assembly and Solar Cell Performance [J].
Cabanetos, Clement ;
El Labban, Abdulrahman ;
Bartelt, Jonathan A. ;
Douglas, Jessica D. ;
Mateker, William R. ;
Frechet, Jean M. J. ;
McGehee, Michael D. ;
Beaujuge, Pierre M. .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2013, 135 (12) :4656-4659
[6]   Highly p-Extended Copolymers with Diketopyrrolopyrrole Moieties for High-Performance Field-Effect Transistors [J].
Chen, Huajie ;
Guo, Yunlong ;
Yu, Gui ;
Zhao, Yan ;
Zhang, Ji ;
Gao, Dong ;
Liu, Hongtao ;
Liu, Yunqi .
ADVANCED MATERIALS, 2012, 24 (34) :4618-4622
[7]   Effect of tetrahydroquinoline dyes structure on the performance of organic dye-sensitized solar cells [J].
Chen, Ruikui ;
Yang, Xichuan ;
Tian, Haining ;
Wang, Xiuna ;
Hagfeldt, Anders ;
Sun, Licheng .
CHEMISTRY OF MATERIALS, 2007, 19 (16) :4007-4015
[8]   Solution-processed new porphyrin-based small molecules as electron donors for highly efficient organic photovoltaics [J].
Chen, Song ;
Xiao, Liangang ;
Zhu, Xunjin ;
Peng, Xiaobing ;
Wong, Wai-Kwok ;
Wong, Wai-Yeung .
CHEMICAL COMMUNICATIONS, 2015, 51 (77) :14439-14442
[9]   Aldehyde end-capped terthiophene with aggregation-induced emission characteristics [J].
Cheng, Jun ;
Liang, Xiaozhong ;
Cao, Yaxiong ;
Guo, Kunpeng ;
Wong, Wai-Yeung .
TETRAHEDRON, 2015, 71 (34) :5634-5639
[10]   Star-shaped perylene-oligothiophene-triphenylamine hybrid systems for photovoltaic applications [J].
Cremer, J ;
Bäuerle, P .
JOURNAL OF MATERIALS CHEMISTRY, 2006, 16 (09) :874-884