Synthesis of copolymers based on benzo[1,2-b:4,5-b′]difuran and fluorinated quinoxaline derivatives and their photovoltaic properties

被引：14

作者：

Cong, Zhiyuan ^{[1
]}

Zhao, Baofeng ^{[1
]}

Wu, Haimei ^{[1
]}

Guo, Zhaoqi ^{[1
]}

Wang, Weiping ^{[1
]}

Luo, Guoping ^{[2
]}

Xu, Jin ^{[2
]}

Xia, Yangjun ^{[3
]}

Gao, Chao ^{[1
]}

An, Zhongwei ^{[1
]}

机构：

[1] Xian Modern Chem Res Inst, Xian 710065, Shaanxi, Peoples R China

[2] S China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China

[3] Lanzhou Jiaotong Univ, Lanzhou 730070, Peoples R China

来源：

POLYMER | 2015年 / 67卷

关键词：

Polymer solar cell; Bulk-heterojunction; Benzodifuran; POLYMER SOLAR-CELLS; OPEN-CIRCUIT VOLTAGE; BAND-GAP COPOLYMERS; POLYFLUORENE COPOLYMER; CONVERSION EFFICIENCY; MOLECULAR-WEIGHT; ENERGY-LEVELS; HOMO LEVEL; PERFORMANCE; DONOR;

D O I：

10.1016/j.polymer.2015.04.058

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Two alternating polymers based on two-dimensional conjugated benzo[1,2-b:4,5-b']difuran and fluorinated quinoxaline derivatives were synthesized. Their structures are poly{4,8-bis(2,3-(dioctyl)thiophen-5-yl)-benzo[1,2-b:4,5-b']difuran-alt-5,8-bis(thiophen-2-yl)-6-fluoro-2,3-bis(3-octyloxyphenyl) quinoxaline} (P1, mono F) and poly{4,8-bis(2,3-(dioctyl)thiophen-5-yl)-benzo[1,2-b:4,5-b']difuran-alt-5,8-bis(thiophen-2-yl)-6,7-difluoro-2,3-bis(3-octyloxyphenyl) quinoxaline} (P2, double F). UVvis absorption measurements show that the difluorinated polymer P2 exists a higher absorption in comparison with the mono fluorinated polymer P1 either in the solution or in the film. Electrochemical measurements confirm that the polymer P2 displays low energy levels (-5.30 eV and -3.25 eV) of both highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) in comparison with those of P1 (-5.25 eV and -3.20 eV). Photovoltaic cells with conventional device configuration of ITO/PEDOT:PSS/polymer:PC71BM/PFN/Al were fabricated. The power conversion efficiency (PCE) of the optimized polymer solar cells (PSCs) based on P1 reaches 2.22% with a current density of 5.28 mA/cm(2). However, a high PCE of 4.44% with a high current density of 8.74 mA/cm2 was obtained for the double fluorinated polymer P2 based device. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：55 / 62

页数：8

共 40 条

[1]

[Anonymous], 2014, Nature communications, DOI 10.1038/Ncomms6393

[2] Poly(diketopyrrolopyrrole-terthiophene) for Ambipolar Logic and Photovoltaics [J].

Bijleveld, Johan C. ;

Zoombelt, Arjan P. ;

Mathijssen, Simon G. J. ;

Wienk, Martijn M. ;

Turbiez, Mathieu ;

de Leeuw, Dago M. ;

Janssen, Rene A. J. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2009, 131 (46) :16616-+

[3]

Chen HC, 2013, POLYM CHEM-UK, V4, P3411, DOI [10.1039/C3PY00235G, 10.1039/c3py00235g]

[4] Prominent Short-Circuit Currents of Fluorinated Quinoxaline-Based Copolymer Solar Cells with a Power Conversion Efficiency of 8.0% [J].

Chen, Hsieh-Chih ;

Chen, Ying-Hsiao ;

Liu, Chi-Chang ;

Chien, Yun-Chen ;

Chou, Shang-Wei ;

Chou, Pi-Tai .

CHEMISTRY OF MATERIALS, 2012, 24 (24) :4766-4772

[5] A new benzo[1,2-b:4,5-b′]difuran-based copolymer for efficient polymer solar cells [J].

Chen, Xuewen ;

Liu, Bo ;

Zou, Yingping ;

Xiao, Lu ;

Guo, Xiuping ;

He, Yuehui ;

Li, Yongfang .

JOURNAL OF MATERIALS CHEMISTRY, 2012, 22 (34) :17724-17731

[6] A new donor-acceptor-donor polyfluorene copolymer with balanced electron and hole mobility [J].

Gadisa, Abay ;

Mammo, Wendimagegn ;

Andersson, L. Mattias ;

Admassie, Shimelis ;

Zhang, Fengling ;

Andersson, Mats R. ;

Inganas, Olle .

ADVANCED FUNCTIONAL MATERIALS, 2007, 17 (18) :3836-3842

[7]

He ZC, 2012, NAT PHOTONICS, V6, P591, DOI [10.1038/NPHOTON.2012.190, 10.1038/nphoton.2012.190]

[8] Largely Enhanced Efficiency with a PFN/Al Bilayer Cathode in High Efficiency Bulk Heterojunction Photovoltaic Cells with a Low Bandgap Polycarbazole Donor [J].

He, Zhicai ;

Zhang, Chen ;

Xu, Xiaofeng ;

Zhang, Lianjie ;

Huang, Liang ;

Chen, Junwu ;

Wu, Hongbin ;

Cao, Yong .

ADVANCED MATERIALS, 2011, 23 (27) :3086-+

[9] Benzodifuran-alt-thienothiophene based low band gap copolymers: substituent effects on their molecular energy levels and photovoltaic properties [J].

Huo, Lijun ;

Li, Zhaojun ;

Guo, Xia ;

Wu, Yue ;

Zhang, Maojie ;

Ye, Long ;

Zhang, Shaoqing ;

Hou, Jianhui .

POLYMER CHEMISTRY, 2013, 4 (10) :3047-3056

[10] Conjugated and Nonconjugated Substitution Effect on Photovoltaic Properties of Benzodifuran-Based Photovoltaic Polymers [J].