High-performance all-polymer solar cells with only 0.47 eV energy loss

作者:Wu, Q (Wu, Qiang)[ 1 ] ; Wang, W (Wang, Wei)[ 1 ] ; Wang, T (Wang, Tao)[ 1 ] ; Sun, R (Sun, Rui)[ 1 ] ; Guo, J (Guo, Jing)[ 1 ] ; Wu, Y (Wu, Yao)[ 1 ] ; Jiao, XC (Jiao, Xuechen)[ 4,5 ] ; Brabec, CJ (Brabec, Christoph J.)[ 6 ] ; Li, YF (Li, Yongfang)[ 2 ] ; Min, J (Min, Jie)[ 1,2,3 ]

SCIENCE CHINA-CHEMISTRY

卷: 63 期: 10 页: 1449-1460 特刊: SI

DOI: 10.1007/s11426-020-9785-7

出版年:OCT 2020

在线发表日期: JUL 2020

文献类型:Article

摘要

The field of all-polymer solar cells (all-PSCs) has experienced rapid development during the past few years, mainly driven by the development of efficient polymer acceptors. However, the power conversion efficiencies (PCEs) of the all-PSCs are still limited by insufficient light absorption of the donor/acceptor blend and large energy loss in devices. We herein designed a polymer acceptor PYT1 constructed n-type molecular acceptor Y5-C20 as the key building block and blended it with a polymer donor PM6 to obtain an all-polymer photoactive layer. The optimized PM6:PYT1 all-PSCs achieved a record higher PCE of 13.43% with a very low energy loss of 0.47 eV and a photoresponse of up to 900 nm compared with the Y5-C20 based device with a best PCE of 9.42%. Furthermore, the PCEs of the PM6:PYT1 all-PSCs are relatively insensitive to the 1-chloronaphthalene (CN) additive contents and active layer thickness. Our results also highlight the effect of CN additive on PM6:PYT1 morphology,i.e., charge generation, and transport find an optimized balance, and radiative and non-radiative loss is simultaneously reduced in the blend. This work promotes the development of high-performance polymer acceptors and heralds a brighter future of all-PSCs for commercial applications.

关键词

作者关键词:all-polymer solar cells; polymer acceptor; absorption coefficient; energy loss; mechanical stability

KeyWords Plus:BANDGAP POLYMER; ACCEPTOR; EFFICIENCY; MORPHOLOGY; DONOR

作者信息

通讯作者地址:

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

Chinese Academy of Sciences Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China.

Zhengzhou University Zhengzhou Univ, Minist Educ, Key Lab Mat Proc & Mold, Zhengzhou 450002, 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: Min, J (通讯作者)

Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China.

通讯作者地址: Min, J (通讯作者)

Zhengzhou Univ, Minist Educ, Key Lab Mat Proc & Mold, Zhengzhou 450002, Peoples R China.

地址:

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

[ 2 ]‎ Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China

[ 3 ]‎ Zhengzhou Univ, Minist Educ, Key Lab Mat Proc & Mold, Zhengzhou 450002, Peoples R China

[ 4 ]‎ Monash Univ, Dept Mat Sci & Engn, Clayton, Vic, Australia

[ 5 ]‎ Australian Synchrotron, Clayton, Vic, Australia

[ 6 ]‎ Friedrich Alexander Univ Erlangen Nurnberg, Inst Mat Elect & Energy Technol I MEET, Erlangen, Germany

电子邮件地址:min.jie@whu.edu.cn