An Unfused-Core-Based Nonfullerene Acceptor Enables High-Efficiency Organic Solar Cells with Excellent Morphological Stability at High Temperatures

被引:466
作者
Li, Shuixing [1 ]
Zhan, Lingling [1 ]
Liu, Feng [2 ,3 ]
Ren, Jie [1 ]
Shi, Minmin [1 ]
Li, Chang-Zhi [1 ]
Russell, Thomas P. [4 ]
Chen, Hongzheng [1 ]
机构
[1] Zhejiang Univ, Dept Polymer Sci & Engn, State Key Lab Silicon Mat, MOE Key Lab Macromol Synth & Functionalizat, Hangzhou 310027, Zhejiang, Peoples R China
[2] Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China
[3] Shanghai Jiao Tong Univ, CICIFSA, Shanghai 200240, Peoples R China
[4] Univ Massachusetts, Dept Polymer Sci & Engn, Amherst, MA 01003 USA
基金
中国国家自然科学基金;
关键词
morphological stability; noncovalent interactions; nonfullerene acceptors; organic solar cells; unfused-core acceptors; OPEN-CIRCUIT VOLTAGE; NON-FULLERENE ACCEPTOR; RING ELECTRON-ACCEPTOR; LOW-BANDGAP POLYMER; 11-PERCENT EFFICIENCY; DESIGN; PERFORMANCE; PHOTOVOLTAICS; GAP; AGGREGATION;
D O I
10.1002/adma.201705208
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Most nonfullerene acceptors developed so far for high-performance organic solar cells (OSCs) are designed in planar molecular geometry containing a fused-ring core. In this work, a new nonfullerene acceptor of DF-PCIC is synthesized with an unfused-ring core containing two cyclopentadithiophene (CPDT) moieties and one 2,5-difluorobenzene (DFB) group. A nearly planar geometry is realized through the F center dot center dot center dot H noncovalent interaction between CPDT and DFB for DF-PCIC. After proper optimizations, the OSCs with DF-PCIC as the acceptor and the polymer PBDB-T as the donor yield the best power conversion efficiency (PCE) of 10.14% with a high fill factor of 0.72. To the best of our knowledge, this efficiency is among the highest values for the OSCs with nonfullerene acceptors owning unfused-ring cores. Furthermore, no obvious morphological changes are observed for the thermally treated PBDB-T:DF-PCIC blended films, and the relevant devices can keep approximate to 70% of the original PCEs upon thermal treatment at 180 degrees C for 12 h. This tolerance of such a high temperature for so long time is rarely reported for fullerene-free OSCs, which might be due to the unique unfused-ring core of DF-PCIC. Therefore, the work provides new idea for the design of new nonfullerene acceptors applicable in commercial OSCs in the future.
引用
收藏
页数:8
相关论文
共 52 条
[1]   Reduced voltage losses yield 10% efficient fullerene free organic solar cells with >1 V open circuit voltages [J].
Baran, D. ;
Kirchartz, T. ;
Wheeler, S. ;
Dimitrov, S. ;
Abdelsamie, M. ;
Gorman, J. ;
Ashraf, R. S. ;
Holliday, S. ;
Wadsworth, A. ;
Gasparini, N. ;
Kaienburg, P. ;
Yan, H. ;
Amassian, A. ;
Brabec, C. J. ;
Durrant, J. R. ;
McCulloch, I. .
ENERGY & ENVIRONMENTAL SCIENCE, 2016, 9 (12) :3783-3793
[2]  
Baran D, 2017, NAT MATER, V16, P363, DOI [10.1038/NMAT4797, 10.1038/nmat4797]
[3]   11.4% Efficiency non-fullerene polymer solar cells with trialkylsilyl substituted 2D-conjugated polymer as donor [J].
Bin, Haijun ;
Gao, Liang ;
Zhang, Zhi-Guo ;
Yang, Yankang ;
Zhang, Yindong ;
Zhang, Chunfeng ;
Chen, Shanshan ;
Xue, Lingwei ;
Yang, Changduk ;
Xiao, Min ;
Li, Yongfang .
NATURE COMMUNICATIONS, 2016, 7
[4]   Electrochemical Considerations for Determining Absolute Frontier Orbital Energy Levels of Conjugated Polymers for Solar Cell Applications [J].
Cardona, Claudia M. ;
Li, Wei ;
Kaifer, Angel E. ;
Stockdale, David ;
Bazan, Guillermo C. .
ADVANCED MATERIALS, 2011, 23 (20) :2367-2371
[5]   Stability of organic solar cells: challenges and strategies [J].
Cheng, Pei ;
Zhan, Xiaowei .
CHEMICAL SOCIETY REVIEWS, 2016, 45 (09) :2544-2582
[6]   Fused Nonacyclic Electron Acceptors for Efficient Polymer Solar Cells [J].
Dai, Shuixing ;
Zhao, Fuwen ;
Zhang, Qianqian ;
Lau, Tsz-Ki ;
Li, Tengfei ;
Liu, Kuan ;
Ling, Qidan ;
Wang, Chunru ;
Lu, Xinhui ;
You, Wei ;
Zhan, Xiaowei .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2017, 139 (03) :1336-1343
[7]   Fluorination-enabled optimal morphology leads to over 11% efficiency for inverted small-molecule organic solar cells [J].
Deng, Dan ;
Zhang, Yajie ;
Zhang, Jianqi ;
Wang, Zaiyu ;
Zhu, Lingyun ;
Fang, Jin ;
Xia, Benzheng ;
Wang, Zhen ;
Lu, Kun ;
Ma, Wei ;
Wei, Zhixiang .
NATURE COMMUNICATIONS, 2016, 7
[8]   Pronounced Effects of a Triazine Core on Photovoltaic Performance-Efficient Organic Solar Cells Enabled by a PDI Trimer-Based Small Molecular Acceptor [J].
Duan, Yuwei ;
Xu, Xiaopeng ;
Yan, He ;
Wu, Wenlin ;
Li, Zuojia ;
Peng, Qiang .
ADVANCED MATERIALS, 2017, 29 (07)
[9]   High-Performance Nonfullerene Polymer Solar Cells based on Imide-Functionalized Wide-Bandgap Polymers [J].
Fan, Baobing ;
Zhang, Kai ;
Jiang, Xiao-Fang ;
Ying, Lei ;
Huang, Fei ;
Cao, Yong .
ADVANCED MATERIALS, 2017, 29 (21)
[10]   Terminal π-π stacking determines three-dimensional molecular packing and isotropic charge transport in an A-π-A electron acceptor for non-fullerene organic solar cells [J].
Han, Guangchao ;
Guo, Yuan ;
Song, Xiaoxian ;
Wang, Yue ;
Yi, Yuanping .
JOURNAL OF MATERIALS CHEMISTRY C, 2017, 5 (20) :4852-4857