The Influence of Backbone Fluorination on the Dielectric Constant of Conjugated Polythiophenes

被引:20
|
作者
Boufflet, Pierre [1 ,2 ]
Bovo, Gianluca [2 ,3 ]
Occhi, Luca [2 ,3 ]
Yuan, Hua-Kang [2 ,3 ]
Fei, Zhuping [1 ,2 ]
Han, Yang [1 ,2 ]
Anthopoulos, Thomas D. [2 ,3 ]
Stavrinou, Paul N. [4 ]
Heeney, Martin [1 ,2 ]
机构
[1] Imperial Coll London, Dept Chem, London SW7 2AZ, England
[2] Imperial Coll London, Ctr Plast Elect, London SW7 2AZ, England
[3] Imperial Coll London, Dept Phys, London SW7 2AZ, England
[4] Univ Oxford, Dept Engn Sci, Parks Rd, Oxford OX1 3PJ, England
来源
ADVANCED ELECTRONIC MATERIALS | 2018年 / 4卷 / 10期
基金
英国工程与自然科学研究理事会;
关键词
block copolymers; conjugated polymers; dielectric constant; fluorination; OPEN-CIRCUIT VOLTAGE; SOLAR-CELL; POLYMERS; THIOPHENE; MORPHOLOGY; SEPARATION; COPOLYMER; BEHAVIOR; RECOMBINATION; SUBSTITUENTS;
D O I
10.1002/aelm.201700375
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The ability to modify or enhance the dielectric constant of semiconducting polymers can prove valuable for a range of optoelectronic and microelectronic applications. In the case of organic photovoltaics, increasing the dielectric constant of the active layer has often been suggested as a method to control charge generation, recombination dynamics, and ultimately, the power conversion efficiencies. In this contribution, the impact that the degree and pattern of fluorination has on the dielectric constant of poly(3-octylthiophene) (P3OT), a more soluble analogue of the widely studied conjugated material poly(3-hexylthiophene), is explored. P3OT and its backbone-fluorinated analogue, F-P3OT, are compared along with a block and alternating copolymer version of these materials. It is found that the dielectric constant of the polymer thin films increases as the degree of backbone fluorination increases, in a trend consistent with density functional theory calculations of the dipole moment.
引用
收藏
页数:8
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