Phthalimide-Based High Mobility Polymer Semiconductors for Efficient Nonfullerene Solar Cells with Power Conversion Efficiencies over 13%

Yu, Jianwei1,2,3,4; Chen, Peng1,2; Koh, Chang Woo1,2,5; Wang, Hang1,2,3,4; Yang, Kun1,2; Zhou, Xin1,2; Liu, Bin1,2; Liao, Qiaogan1,2; Chen, Jianhua1,2; Sun, Huiliang1,2; Woo, Han Young5; Zhang, Shiming3,4; Guo, Xugang1,2

2019-01-23

10.1002/advs.201801743

Advanced Science   影响因子和分区

2198-3844

2198-3844

Highly efficient nonfullerene polymer solar cells (PSCs) are developed based on two new phthalimide-based polymers phthalimide-difluorobenzothiadiazole (PhI-ffBT) and fluorinated phthalimide-ffBT (ffPhI-ffBT). Compared to all high-performance polymers reported, which are exclusively based on benzo[1,2-b:4,5-b']dithiophene (BDT), both PhI-ffBT and ffPhI-ffBT are BDT-free and feature a D-A(1)-D-A(2) type backbone. Incorporating a second acceptor unit difluorobenzothiadiazole leads to polymers with low-lying highest occupied molecular orbital levels (approximate to-5.6 eV) and a complementary absorption with the narrow bandgap nonfullerene acceptor IT-4F. Moreover, these BDT-free polymers show substantially higher hole mobilities than BDT-based polymers, which are beneficial to charge transport and extraction in solar cells. The PSCs containing difluorinated phthalimide-based polymer ffPhI-ffBT achieve a substantial PCE of 12.74% and a large V-oc of 0.94 V, and the PSCs containing phthalimide-based polymer PhI-ffBT show a further increased PCE of 13.31% with a higher J(sc) of 19.41 mA cm(-2) and a larger fill factor of 0.76. The 13.31% PCE is the highest value except the widely studied BDT-based polymers and is also the highest among all benzothiadiazole-based polymers. The results demonstrate that phthalimides are excellent building blocks for enabling donor polymers with the state-of-the-art performance in nonfullerene PSCs and the BDT is not necessary for constructing such donor polymers.

difluorobenzothiadiazole high mobility polymers high power conversion efficiencies nonfullerene polymer solar cells phthalimide

SCI ; EI

英语

第一 ; 通讯

NRF of Korea[2016M1A2A2940911] ; NRF of Korea[2015M1A2A2057506]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000456385900018

WILEY

20185106256055

Conversion efficiency ; Efficiency ; Molecular orbitals ; Narrow band gap semiconductors ; Polymer solar cells ; Solar cells

Energy Conversion Issues:525.5 ; Physical Chemistry:801.4 ; Polymeric Materials:815.1 ; Production Engineering:913.1

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.Nanjing Tech Univ NanjingTech, Key Lab Flexible Elect, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, 30 South Puzhu Rd, Nanjing 211816, Jiangsu, Peoples R China
4.Nanjing Tech Univ NanjingTech, Inst Adv Mat, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, 30 South Puzhu Rd, Nanjing 211816, Jiangsu, Peoples R China
5.Korea Univ, Res Inst Nat Sci, Dept Chem, Seoul 136713, South Korea

Yu, Jianwei,Chen, Peng,Koh, Chang Woo,et al. Phthalimide-Based High Mobility Polymer Semiconductors for Efficient Nonfullerene Solar Cells with Power Conversion Efficiencies over 13%[J]. Advanced Science,2019,6(2).

Yu, Jianwei.,Chen, Peng.,Koh, Chang Woo.,Wang, Hang.,Yang, Kun.,...&Guo, Xugang.(2019).Phthalimide-Based High Mobility Polymer Semiconductors for Efficient Nonfullerene Solar Cells with Power Conversion Efficiencies over 13%.Advanced Science,6(2).

Yu, Jianwei,et al."Phthalimide-Based High Mobility Polymer Semiconductors for Efficient Nonfullerene Solar Cells with Power Conversion Efficiencies over 13%".Advanced Science 6.2(2019).