Lock-up function of fluorine enhances photovoltaic performance of polythiophene

Three model polythiophenes,PTCBT,PTCFBT and PFTCBT,have been synthesized to investigate the effect of fluorination on photovoltaic performance of polythiothenes.Compared with PTCBT,PFTCBT with F atom on TC unit shows a narrower optical bandgap（1.79 eV）,higher crystallinity,and ideal morphology in th...

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Bibliographic Details
Published in:Science China. Chemistry 2017-02, Vol.60 (2), p.251-256
Main Authors: Jiao, Na, He, Dan, Qian, Liu, Lei, Zhongli, Ding, Liming
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Electrodes
Electrons
Energy conversion efficiency
Fluorination
Fluorine
F原子
Polymers
Polythiophene
Short circuit currents
光伏性能
光学带隙
功率转换效率
氟化
短路电流密度
聚噻吩
锁定功能
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Summary:Three model polythiophenes,PTCBT,PTCFBT and PFTCBT,have been synthesized to investigate the effect of fluorination on photovoltaic performance of polythiothenes.Compared with PTCBT,PFTCBT with F atom on TC unit shows a narrower optical bandgap（1.79 eV）,higher crystallinity,and ideal morphology in the active layer,leading to a higher short-circuit current density（J SC ）of 11.84 mA/cm~2 and a power conversion efficiency（PCE）of 5.93%.The lock-up function of fluorine enhances polythiophene backbone planarity and molecular packing.
ISSN:1674-7291
1869-1870
DOI:10.1007/s11426-016-0244-3