Steady Enhancement in Photovoltaic Properties of Fluorine Functionalized Quinoxaline-Based Narrow Bandgap Polymer

Wu, Zhonglian1; Jiang, Huanxiang2; Wang, Xingzhu3,4; Yan, Lei3; Zeng, Wei3; Wu, Xiu-Gang5; Zhuang, Haiyu1; Zhu, Wen1; Yang, Renqiang2

2019-01

10.3390/molecules24010054

MOLECULES   影响因子和分区

1420-3049

To investigate the influence of fluoride phenyl side-chains onto a quinoxaline (Qx) unit on the photovoltaic performance of the narrow bandgap (NBG) photovoltaic polymers, herein, two novel NBG copolymers, PBDTT-DTQx and PBDTT-DTmFQx, were synthesized and characterized. 2-ethylhexylthiothiophene-substituted benzodithiophene (BDTT), 2,3-diphenylquinoxaline (DQx) [or 2,3-bis(3-fluorophenyl)quinoxaline (DmFQx)] and 2-ethylhexylthiophene (T) were used as the electron donor (D) unit, electron-withdrawing acceptor (A) unit and -bridge, respectively. Compared to non-fluorine substituted PBDTT-DTQx, fluoride PBDTT-DTmFQx exhibited a wide UV-Vis absorption spectrum and high hole mobility. An enhanced short-circuit current (J(sc)) and fill factor (FF) simultaneously gave rise to favorable efficiencies in the polymer/PC71BM-based polymer solar cells (PSCs). Under the illumination of AM 1.5G (100 mW cm(-2)), a maximum power conversion efficiency (PCE) of 6.40% was achieved with an open-circuit voltage (V-oc) of 0.87 V, a J(sc) of 12.0 mA cm(-2) and a FF of 61.45% in PBDTT-DTmFQx/PC71BM-based PSCs, while PBDTT-DTQx-based devices also exhibited a PCE of 5.43%. The excellent results obtained demonstrate that PBDTT-DTmFQx by fluorine atom engineering could be a promising candidate for organic photovoltaics.

polymer solar cells bulk heterojunction quinoxaline narrow bandgap conjugated polymer synthesis

SCI

英语

通讯

Hunan 2011 Collaborative Innovation Center of Chemical Engineering & Technology with Environmental Benignity and Effective Resource Utilization, Science and Technology Program of Huizhou City[2017X0202012]

Biochemistry & Molecular Biology ; Chemistry

Biochemistry & Molecular Biology ; Chemistry, Multidisciplinary

WOS:000457150200054

MDPI

CHEMISTRY

Web of Science

1.Jiangsu Univ Technol, Sch Mat Engn, Changzhou 213001, Peoples R China
2.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Peoples R China
3.Xiangtan Univ, Coll Chem, Xiangtan 411105, Peoples R China
4.Southern Univ Sci & Technol, Shenzhen 518055, Peoples R China
5.Changzhou Univ, Jiangsu Key Lab Environm Friendly Polymer Mat, Sch Mat Sci & Engn, Changzhou 213164, Peoples R China

Wu, Zhonglian,Jiang, Huanxiang,Wang, Xingzhu,et al. Steady Enhancement in Photovoltaic Properties of Fluorine Functionalized Quinoxaline-Based Narrow Bandgap Polymer[J]. MOLECULES,2019,24(1).

Wu, Zhonglian.,Jiang, Huanxiang.,Wang, Xingzhu.,Yan, Lei.,Zeng, Wei.,...&Yang, Renqiang.(2019).Steady Enhancement in Photovoltaic Properties of Fluorine Functionalized Quinoxaline-Based Narrow Bandgap Polymer.MOLECULES,24(1).

Wu, Zhonglian,et al."Steady Enhancement in Photovoltaic Properties of Fluorine Functionalized Quinoxaline-Based Narrow Bandgap Polymer".MOLECULES 24.1(2019).