Systematic Fluorination of P3HT: Synthesis of P(3HT-co-3H4FT)s by Direct Arylation Polymerization, Characterization, and Device Performance in OPVs
Systematic Fluorination of P3HT: Synthesis of P(3HT-co-3H4FT)s by Direct Arylation Polymerization, Characterization, and Device Performance in OPVs
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DOI：
10.1021/acs.macromol.6b00386
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发表时间：
2016-04
期刊：
影响因子：
5.5
通讯作者：
Patrick D. Homyak;Yao Liu;Jared D. Harris;Feng Liu;Kenneth R. Carter;Thomas P. Russell;E. Bryan Coughlin
中科院分区：
文献类型：
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作者：
Patrick D. Homyak;Yao Liu;Jared D. Harris;Feng Liu;Kenneth R. Carter;Thomas P. Russell;E. Bryan Coughlin
我们提出了一种策略，以调整p3ht为基础的共聚物的物理性质，通过纳入一个氟化噻吩重复单元。描述了一系列氟化聚噻吩P（3HT-co-3H4FT）材料的合成和表征，其中聚合物主链中氟化重复单元的百分比系统地从0到100%不等。这些P(3HT-co-3H4FT)s （P0, P25, P50， P75和P100）通过直接芳基化聚合（DArP）法合成。通过改变两种单体的进料比，可以精确控制氟化重复单元（3H4FT）的百分比。随着氟化程度的增加，聚合物的电子性能受到强烈影响，与P0相比，P100的EHOMO水平下降了0.4 eV。采用GIWAXS和TEM对其结晶度和形貌进行了表征。薄膜聚合物/多氯联苯体积异质结共混物的透射电镜分析表明，氟化程度的增加不会导致更强的相分离。有机ph值……
We present a strategy for tuning physical properties of P3HT-based copolymers by incorporating a fluorinated thiophene repeat unit. The synthesis and characterization of a series of fluorinated polythiophene P(3HT-co-3H4FT) materials are described, where the percentage of fluorinated repeat units in the polymer backbone is systematically varied from 0 to 100%. These P(3HT-co-3H4FT)s (P0, P25, P50, P75, and P100) were synthesized via direct arylation polymerization (DArP) methods. By varying the feed ratio of the two monomers, the percent of fluorinated repeat units (3H4FT) could be precisely controlled. As fluorination is increased, there is a strong effect on the electronic properties of the polymers, evidenced by a 0.4 eV drop in the EHOMO level for P100 when compared to P0. GIWAXS and TEM were used to determine the crystallinity and morphology. TEM analysis of thin film polymer/PCBM bulk-heterojunction blends indicates that increased fluorination does not result in stronger phase separation. Organic ph...