1,4-Di(3-alkoxy-2-thienyI)-2,5-difluorophenylene: A Building Block Enabling High-Performance Polymer Semiconductors with Increased Open-Circuit Voltages

Chen, Jianhua1,2,4,5; Yan, Zhenglong1,2,7; Tang, Linjing1,2; Uddin, Mohammad Afsar3; Yu, Jianwei1,2; Zhou, Xin1,2; Yang, Kun1,2; Tang, Yumin1,2; Shin, Tae Joo6; Woo, Han Young3; Guo, Xugang1,2

2018-07-24

10.1021/acs.macromol.8b00975

MACROMOLECULES   影响因子和分区

0024-9297

1520-5835

A new building block, 1,4-di(3-alkoxy-2-thienyl)-2,5-difluorophenylene (DOTFP) with several desirable features such as high backbone planarity, suitably lying highest occupied molecular orbital (HOMO), and good solubility, was developed by inserting an electron-deficient difluorophenylene into the 3,3'-dialkoxy-2,2'-bithiophene (BTOR) unit. Three regioregular D-A(1)-D-A2 type polymers based on DOTFP and benzothiadiazole (BT) derivatives were synthesized and characterized by comparing with a D-A type BTOR-based polymer. The content of highly electron-rich alkoxythiophene is reduced by half in the DOTFP-based polymers versus that of the BTOR-based polymer analogue, which results in a deeper HOMO level and benefits high open-circuit voltage (V-oc) in polymer solar cells (PSCs). Consequently, the DOTFP-ffBT-based solar cells exhibited a significantly improved power conversion efficiency (PCE) of 8.7% and an increased V-oc of 0.84 V compared to the BTOR-ffBT-based solar cells with a PCE of 2.6% and a V-oc of 0.49 V. Additionally, the DOTFP-based polymers showed improved charge transport properties and film morphology than the BTOR-based polymer BTOR-ffBT, resulting in simultaneous enhancement of the short-circuit current (J(sc)) and fill factor (FF) in PSCs. These results demonstrate the great promise of the DOTFP building block for the construction of high-performance photovoltaic polymer semiconductors with increased V(oc)s.

SCI ; EI

英语

NI期刊

第一 ; 通讯

NRF of Korea[2016M1A2A2940911] ; NRF of Korea[20100020209]

Polymer Science

Polymer Science

WOS:000440105200034

AMER CHEMICAL SOC

20183105633870

Molecular orbitals ; Open circuit voltage ; Polymer solar cells ; Solar cells ; Timing circuits

Solar Cells:702.3 ; Pulse Circuits:713.4 ; Physical Chemistry:801.4 ; Polymeric Materials:815.1

CHEMISTRY

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, 1088 Xueyuan Rd, Shenzhen 518055, Guangdong, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen Key Lab Printed Organ Elect, 1088 Xueyuan Rd, Shenzhen 518055, Guangdong, Peoples R China
3.Korea Univ, Dept Chem, Seoul 136713, South Korea
4.Nankai Univ, Coinnovat Ctr Chem & Chem Engn Tianjin, Inst Polymer Chem, Coll Chem,Key Lab Funct Polymer Mat, Tianjin 300071, Peoples R China
5.Nankai Univ, Coinnovat Ctr Chem & Chem Engn Tianjin, Inst Polymer Chem, Coll Chem,State Key Lab Med Chem Biol, Tianjin 300071, Peoples R China
6.UNIST, UNIST Cent Res Facil UCRF, Ulsan 689798, South Korea
7.Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China

Chen, Jianhua,Yan, Zhenglong,Tang, Linjing,et al. 1,4-Di(3-alkoxy-2-thienyI)-2,5-difluorophenylene: A Building Block Enabling High-Performance Polymer Semiconductors with Increased Open-Circuit Voltages[J]. MACROMOLECULES,2018,51(14):5352-5363.

Chen, Jianhua.,Yan, Zhenglong.,Tang, Linjing.,Uddin, Mohammad Afsar.,Yu, Jianwei.,...&Guo, Xugang.(2018).1,4-Di(3-alkoxy-2-thienyI)-2,5-difluorophenylene: A Building Block Enabling High-Performance Polymer Semiconductors with Increased Open-Circuit Voltages.MACROMOLECULES,51(14),5352-5363.

Chen, Jianhua,et al."1,4-Di(3-alkoxy-2-thienyI)-2,5-difluorophenylene: A Building Block Enabling High-Performance Polymer Semiconductors with Increased Open-Circuit Voltages".MACROMOLECULES 51.14(2018):5352-5363.