Journal ArticleDOI
Efficient Nonfullerene Polymer Solar Cells Enabled by a Novel Wide Bandgap Small Molecular Acceptor.
Guangjun Zhang,Guofang Yang,He Yan,Joo-Hyun Kim,Harald Ade,Wenlin Wu,Xiaopeng Xu,Yuwei Duan,Qiang Peng +8 more
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TLDR
A wide bandgap small molecular acceptor, SFBRCN, containing a 3D spirobifluorene core flaked with a 2,1,3-benzothiadiazole (BT) and end-capped with highly electron-deficient RCN units, has been successfully synthesized as a small molecularacceptor (SMA) for nonfullerene polymer solar cells (PSCs).Abstract:
A wide bandgap small molecular acceptor, SFBRCN, containing a 3D spirobifluorene core flaked with a 2,1,3-benzothiadiazole (BT) and end-capped with highly electron-deficient (3-ethylhexyl-4-oxothiazolidine-2-yl)dimalononitrile (RCN) units, has been successfully synthesized as a small molecular acceptor (SMA) for nonfullerene polymer solar cells (PSCs). This SMA exhibits a relatively wide optical bandgap of 2.03 eV, which provides a complementary absorption to commonly used low bandgap donor polymers, such as PTB7-Th. The strong electron-deficient BT and RCN units afford SFBRCN with a low-lying LUMO (lowest unoccupied molecular orbital) level, while the 3D structured spirobifluorene core can effectively suppress the self-aggregation tendency of the SMA, thus yielding a polymer:SMA blend with reasonably small domain size. As the results of such molecular design, SFBRCN enables nonfullerene PSCs with a high efficiency of 10.26%, which is the highest performance reported to date for a large bandgap nonfullerene SMA.read more
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Journal ArticleDOI
Non-fullerene acceptors for organic solar cells
TL;DR: Non-fullerene acceptors (NFAs) are currently a major focus of research in the development of bulk-heterojunction organic solar cells (OSCs) as mentioned in this paper.
Journal ArticleDOI
Nonfullerene Acceptor Molecules for Bulk Heterojunction Organic Solar Cells
Guangye Zhang,Jingbo Zhao,Philip C. Y. Chow,Kui Jiang,Jianquan Zhang,Zonglong Zhu,Jie Zhang,Fei Huang,He Yan,He Yan +9 more
TL;DR: Progress is summarized, aiming to describe the molecular design strategy, to provide insight into the structure-property relationship, and to highlight the challenges the field is facing, with emphasis placed on most recent nonfullerene acceptors that demonstrated top-of-the-line photovoltaic performances.
Journal ArticleDOI
Over 14% Efficiency in Organic Solar Cells Enabled by Chlorinated Nonfullerene Small-Molecule Acceptors.
Hao Zhang,Huifeng Yao,Junxian Hou,Jie Zhu,Jianqi Zhang,Wanning Li,Runnan Yu,Bowei Gao,Shaoqing Zhang,Jianhui Hou,Jianhui Hou +10 more
TL;DR: Chlorination demonstrates effective ability in enhancing the device performance and facile synthesis route, which both deserve further exploitation in the modification of photovoltaic materials.
Journal ArticleDOI
Realizing Over 13% Efficiency in Green-Solvent-Processed Nonfullerene Organic Solar Cells Enabled by 1,3,4-Thiadiazole-Based Wide-Bandgap Copolymers
TL;DR: Two novel wide-bandgap copolymers, PBDT-TDZ and PBDTS- TDZ, are developed based on 1,3,4-thiadiazole (TDZ) and benzo[1,2-b:4,5-b']dithiophene (BDT) building blocks, which exhibit the stronger optical absorption, lower-lying HOMO level, and higher crystallinity.
Journal ArticleDOI
Improved Charge Transport and Reduced Nonradiative Energy Loss Enable Over 16% Efficiency in Ternary Polymer Solar Cells
TL;DR: This work suggests that utilizing the complementary advantages of fullerene and NFAs is a promising way to finely tune the detailed photovoltaic parameters and further improve the PCEs of PSCs.
References
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Journal ArticleDOI
Design and Synthesis of a Low Bandgap Small Molecule Acceptor for Efficient Polymer Solar Cells
TL;DR: A novel non-fullerene acceptor, possessing a very low bandgap of 1.34 eV and a high-lying lowest unoccupied molecular orbital level of -3.95 eV, is designed and synthesized by introducing electron-donating alkoxy groups to the backbone of a conjugated small molecule.
Journal ArticleDOI
Mapping Polymer Donors toward High‐Efficiency Fullerene Free Organic Solar Cells
Yuze Lin,Yuze Lin,Fuwen Zhao,Yang Wu,Kai Chen,Yuxin Xia,Guangwu Li,Shyamal K. K. Prasad,Jingshuai Zhu,Lijun Huo,Haijun Bin,Zhi-Guo Zhang,Xia Guo,Maojie Zhang,Yanming Sun,Feng Gao,Zhixiang Wei,Wei Ma,Chunru Wang,Justin M. Hodgkiss,Zhishan Bo,Olle Inganäs,Yongfang Li,Yongfang Li,Xiaowei Zhan +24 more
TL;DR: Five polymer donors with distinct chemical structures and different electronic properties are surveyed in a planar and narrow-bandgap fused-ring electron acceptor (IDIC)-based organic solar cells, which exhibit power conversion efficiencies of up to 11%.
Journal ArticleDOI
High-efficiency non-fullerene organic solar cells enabled by a difluorobenzothiadiazole-based donor polymer combined with a properly matched small molecule acceptor
Jingbo Zhao,Yunke Li,Haoran Lin,Yuhang Liu,Yuhang Liu,Kui Jiang,Cheng Mu,Tingxuan Ma,Tingxuan Ma,Joshua Yuk Lin Lai,Huawei Hu,Huawei Hu,Demei Yu,He Henry Yan +13 more
TL;DR: In this paper, the authors reported high performance small molecule acceptor (SMA)-based organic solar cells (OSCs) enabled by the combination of a difluorobenzothiadiazole donor polymer named PffBT4T-2DT and a SMA named SF-PDI2.
Journal ArticleDOI
Covalently Bound Clusters of Alpha-Substituted PDI—Rival Electron Acceptors to Fullerene for Organic Solar Cells
TL;DR: A cluster type of electron acceptor, TPB, bearing four α-perylenediimides (PDIs), was developed, in which the four PDIs form a cross-like molecular conformation while still partially conjugated with the BDT-Th core.
Journal ArticleDOI
A tetraphenylethylene core-based 3D structure small molecular acceptor enabling efficient non-fullerene organic solar cells.
Yuhang Liu,Yuhang Liu,Cheng Mu,Kui Jiang,Jingbo Zhao,Yunke Li,Lu Zhang,Zhengke Li,Joshua Yuk Lin Lai,Huawei Hu,Tingxuan Ma,Tingxuan Ma,Rongrong Hu,Demei Yu,Xuhui Huang,Ben Zhong Tang,He Yan +16 more
TL;DR: The work provides a new molecular design approach to efficient non-fullerene OSCs based on 3D-structured small-molecule acceptors based on tetraphenylethylene core-based small molecular acceptor with a unique 3D molecular structure.