Ternary All-Polymer Solar Cells With 8.5% Power Conversion Efficiency and Excellent Thermal Stability

Liu, Xi1,2; Zhang, Chaohong3,4; Pang, Shuting2; Li, Ning3,5; Brabec, Christoph J.3,5; Duan, Chunhui2; Huang, Fei2; Cao, Yong2

2020-04-21

10.3389/fchem.2020.00302

Frontiers in Chemistry   影响因子和分区

2296-2646

All-polymer solar cells (all-PSCs) composed of polymer donors and acceptors have attracted widespread attention in recent years. However, the broad and efficient photon utilization of polymer:polymer blend films remains challenging. In our previous work, we developed NOE10, a linear oligoethylene oxide (OE) side-chain modified naphthalene diimide (NDI)-based polymer acceptor which exhibited a power conversion efficiency (PCE) of 8.1% when blended with a wide-bandgap polymer donor PBDT-TAZ. Herein, we report a ternary all-PSC strategy of incorporating a state-of-the-art narrow bandgap polymer (PTB7-Th) into the PBDT-TAZ:NOE10 binary system, which enables 8.5% PCEs within a broad ternary polymer ratio. We further demonstrate that, compared to the binary system, the improved photovoltaic performance of ternary all-PSCs benefits from the combined effect of enhanced photon absorption, more efficient charge generation, and balanced charge transport. Meanwhile, similar to the binary system, the ternary all-PSC also shows excellent thermal stability, maintaining 98% initial PCE after aging for 300 h at 65 degrees C. This work demonstrates that the introduction of a narrow-bandgap polymer as a third photoactive component into ternary all-PSCs is an effective strategy to realize highly efficient and stable all-PSCs.

all-polymer solar cells ternary solar cells power conversion efficiency thermal stability Forster resonant energy transfer

SCI

英语

其他

Ministry of Science and Technology[2019YFA0705900][2017YFA0206600] ; National Natural Science Foundation of China[21875072][21520102006] ; scientific research startup funds for high-level talents of Wuyi University[AL2019003] ; Natural Science Foundation of Guangdong Province[2019A1515110944][2019A1515010848] ; Youth Innovation Talent Project for the Universities of Guangdong Province[2019KQNCX161] ; DFG[SFB 953][182849149]

Chemistry

Chemistry, Multidisciplinary

WOS:000531621300001

FRONTIERS MEDIA SA

Web of Science

1.Wuyi Univ, Sch Text Mat & Engn, Jiangmen, Peoples R China
2.South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou, Peoples R China
3.Friedrich Alexander Univ Erlangen Nurberg, Inst Mat Elect & Energy Technol I MEET, Erlangen, Germany
4.Southern Univ Sci & Technol, SUSTech Acad Adv Interdisciplinary Studies, Shenzhen, Peoples R China
5.Helmholtz Inst Erlangen Nurnberg Renewable Energy, Erlangen, Germany

Liu, Xi,Zhang, Chaohong,Pang, Shuting,et al. Ternary All-Polymer Solar Cells With 8.5% Power Conversion Efficiency and Excellent Thermal Stability[J]. Frontiers in Chemistry,2020,8.

Liu, Xi.,Zhang, Chaohong.,Pang, Shuting.,Li, Ning.,Brabec, Christoph J..,...&Cao, Yong.(2020).Ternary All-Polymer Solar Cells With 8.5% Power Conversion Efficiency and Excellent Thermal Stability.Frontiers in Chemistry,8.

Liu, Xi,et al."Ternary All-Polymer Solar Cells With 8.5% Power Conversion Efficiency and Excellent Thermal Stability".Frontiers in Chemistry 8(2020).