Effect of Fluorination on the Properties of a Donor-Acceptor Copolymer for Use in Photovoltaic Cells and Transistors

被引：222

作者：

Bronstein, Hugo ^{[1
,2
]}

Frost, Jarvist M. ^{[1
,2
]}

Hadipour, Afshin ^{[3
]}

Kim, Youngju ^{[1
,2
]}

Nielsen, Christian B. ^{[1
,2
]}

Ashraf, Raja Shahid ^{[1
,2
]}

Rand, Barry P. ^{[3
]}

Watkins, Scott ^{[4
]}

McCulloch, Iain ^{[1
,2
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England

[2] Univ London Imperial Coll Sci Technol & Med, Ctr Plast Elect, London SW7 2AZ, England

[3] IMEC, B-3001 Louvain, Belgium

[4] CSIRO Mat Sci & Engn, Melbourne, Vic 3169, Australia

来源：

CHEMISTRY OF MATERIALS | 2013年 / 25卷 / 03期

关键词：

solar cells; conjugated polymer; OFET; fluorine; OPV; HETEROJUNCTION SOLAR-CELLS; OPEN-CIRCUIT VOLTAGE; HIGH-PERFORMANCE; SEMICONDUCTING POLYMERS; CONJUGATED POLYMERS; PALLADIUM NANOPARTICLES; INDACENODITHIOPHENE; DESIGN; BENZOTHIADIAZOLE;

D O I：

10.1021/cm301910t

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 novel indacenodithiophene (IDT) based donor-acceptor conjugated polymers for use in organic field effect transistors and photovoltaic devices are synthesized and characterized. The effect of inclusion of two fluorine atoms on the acceptor portion of the polymer is thoroughly investigated via a range of techniques. The inductively withdrawing and mesomerically donating properties of the fluorine atoms result in a decrease of the highest occupied molecular orbital (HOMO), with little effect on the lowest unoccupied molecular orbital (LUMO) as demonstrated through density functional theory (DFT) analysis. Inclusion of fluorine atoms also leads to a potentially more planar backbone through inter and intrachain interactions. Use of the novel materials in organic field effect transistor (OFET) and organic photovoltaic (OPV) devices leads to high mobilities around 0.1 cm(2)/(V s) and solar cell efficiencies around 4.5%.

引用

页码：277 / 285

页数：9

共 45 条

[21] New architecture for high-efficiency polymer photovoltaic cells using solution-based titanium oxide as an optical spacer [J].