Fluorinated End Group Enables High-Performance All-Polymer Solar Cells with Near-Infrared Absorption and Enhanced Device Efficiency over 14%

作者:Yu, H (Yu, Han)[ 1,2,3,4 ] ; Qi, ZY (Qi, Zhenyu)[ 2,3 ] ; Yu, JW (Yu, Jianwei)[ 5 ] ; Xiao, YQ (Xiao, Yiqun)[ 6 ] ; Sun, R (Sun, Rui)[ 1 ] ; Luo, ZH (Luo, Zhenghui)[ 2,3 ] ; Cheung, AMH (Cheung, Andy Man Hong)[ 2,3 ] ; Zhang, JQ (Zhang, Jianquan)[ 2,3 ] ; Sun, HL (Sun, Huiliang)[ 7 ] ; Zhou, WT (Zhou, Wentao)[ 2,3 ] ; Chen, SS (Chen, Shangshang)[ 2,3 ] ; Guo, XG (Guo, Xugang)[ 7 ] ; Lu, XH (Lu, Xinhui)[ 6 ] ; Gao, F (Gao, Feng)[ 5 ] ; Min, J (Min, Jie)[ 1 ] ; Yan, H (Yan, He)[ 2,3,4,8 ] 

ADVANCED ENERGY MATERIALS

文献号: 2003171

DOI: 10.1002/aenm.202003171

Early access icon在线发表日期: DEC 2020

文献类型:Article; Early Access

摘要

Fluorination of end groups has been a great success in developing efficient small molecule acceptors. However, this strategy has not been applied to the development of polymer acceptors. Here, a dihalogenated end group modified by fluorine and bromine atoms simultaneously, namely IC-FBr, is first developed, then employed to construct a new polymer acceptor (named PYF-T) for all-polymer solar cells (all-PSCs). In comparison with its non-fluorinated counterpart (PY-T), PYF-T exhibits stronger and red-shifted absorption spectra, stronger molecular packing and higher electron mobility. Meanwhile, the fluorination on the end groups down-shifts the energy levels of PYF-T, which matches better with the donor polymer PM6, leading to efficient charge transfer and small voltage loss. As a result, an all-PSC based on PM6:PYF-T yields a higher power conversion efficiency (PCE) of 14.1% than that of PM6:PY-T (11.1%), which is among the highest values for all-PSCs reported to date. This work demonstrates the effectiveness of fluorination of end-groups in designing high-performance polymer acceptors, which paves the way toward developing more efficient and stable all-PSCs.

关键词

作者关键词:all‐ polymer solar cells; fluorinated end groups; polymer acceptors; polymers; solar cells

KeyWords Plus:ACCEPTORS

作者信息

通讯作者地址:

Wuhan University Wuhan Univ, Inst Adv Studies, Wuhan 430072, Peoples R China.

Hong Kong University of Science & Technology Hong Kong Univ Sci & Technol, Dept Chem, Guangdong Hong Kong Macao Joint Lab, Optoelect & Magnet Funct Mat Energy Inst,Kowloon, Clear Water Bay, Hong Kong 999077, Peoples R China.

Hong Kong University of Science & Technology Hong Kong Univ Sci & Technol, Hong Kong Branch, Chinese Natl Engn Res Ctr Tissue Restorat & Recon, Kowloon, Clear Water Bay, Hong Kong 999077, Peoples R China.

Hong Kong Univ Sci & Technol Shenzhen, Res Inst, 9 Yuexing First RD,Hitech Pk, Shenzhen 518057, Peoples R China.

Linkoping University Linkoping Univ, Dept Phys Chem & Biol IFM, S-58183 Linkoping, Sweden.

Chinese University of Hong Kong Chinese Univ Hong Kong, Dept Phys, Hong Kong 999077, Peoples R China.

South China University of Technology South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Peoples R China.

通讯作者地址: Min, J (通讯作者)

Wuhan Univ, Inst Adv Studies, Wuhan 430072, Peoples R China.

通讯作者地址: Yan, H (通讯作者)

Hong Kong Univ Sci & Technol, Dept Chem, Guangdong Hong Kong Macao Joint Lab, Optoelect & Magnet Funct Mat Energy Inst,Kowloon, Clear Water Bay, Hong Kong 999077, Peoples R China.

通讯作者地址: Luo, ZH; Yan, H (通讯作者)

Hong Kong Univ Sci & Technol, Hong Kong Branch, Chinese Natl Engn Res Ctr Tissue Restorat & Recon, Kowloon, Clear Water Bay, Hong Kong 999077, Peoples R China.

通讯作者地址: Yan, H (通讯作者)

Hong Kong Univ Sci & Technol Shenzhen, Res Inst, 9 Yuexing First RD,Hitech Pk, Shenzhen 518057, Peoples R China.

通讯作者地址: Gao, F (通讯作者)

Linkoping Univ, Dept Phys Chem & Biol IFM, S-58183 Linkoping, Sweden.

通讯作者地址: Lu, XH (通讯作者)

Chinese Univ Hong Kong, Dept Phys, Hong Kong 999077, Peoples R China.

通讯作者地址: Yan, H (通讯作者)

South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Peoples R China.

地址:

[ 1 ]‎ Wuhan Univ, Inst Adv Studies, Wuhan 430072, Peoples R China

[ 2 ]‎ Hong Kong Univ Sci & Technol, Dept Chem, Guangdong Hong Kong Macao Joint Lab, Optoelect & Magnet Funct Mat Energy Inst,Kowloon, Clear Water Bay, Hong Kong 999077, Peoples R China

[ 3 ]‎ Hong Kong Univ Sci & Technol, Hong Kong Branch, Chinese Natl Engn Res Ctr Tissue Restorat & Recon, Kowloon, Clear Water Bay, Hong Kong 999077, Peoples R China

[ 4 ]‎ Hong Kong Univ Sci & Technol Shenzhen, Res Inst, 9 Yuexing First RD,Hitech Pk, Shenzhen 518057, Peoples R China

[ 5 ]‎ Linkoping Univ, Dept Phys Chem & Biol IFM, S-58183 Linkoping, Sweden

[ 6 ]‎ Chinese Univ Hong Kong, Dept Phys, Hong Kong 999077, Peoples R China

[ 7 ]‎ Southern Univ Sci & Technol SUSTech, Dept Mat Sci & Engn, 1088 Xueyuan Rd, Shenzhen 518055, Guangdong, Peoples R China

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

电子邮件地址:luozheng@ust.hk; xhlu@phy.cuhk.edu.hk; feng.gao@liu.se; min.jie@whu.edu.cn; hyan@ust.hk