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
Cyano-functionalized small-molecule acceptors for high-efficiency wide-bandgap organic solar cells
Jun Zhang,Jun Zhang,Jie Lv,Xiyue Dong,Tongle Xu,Xuexin Dai,Tainan Duan,Zhipeng Kan,Ping Liu,Shirong Lu +9 more
TL;DR: In this paper, the authors designed and synthesized two widebandgap non-fullerene acceptors (NFAs) for constructing efficient ternary or tandem organic solar cells (OSCs).
Journal ArticleDOI
On-surface synthesis of one-type pore single-crystal porous covalent organic frameworks.
Zhenliang Hao,Lingling Song,Cuixia Yan,Hui Zhang,Zilin Ruan,Shijie Sun,Jianchen Lu,Jinming Cai +7 more
TL;DR: It is revealed that two main factors, the heating rate and growth temperature, have a strong impact on the size and quality of the pCOFs by STM.
Journal ArticleDOI
Conjugation-Curtailing of Benzodithionopyran-Cored Molecular Acceptor Enables Efficient Air-Processed Small Molecule Solar Cells
Hao Wu,Haijun Fan,Wuyue Liu,Shanshan Chen,Shanshan Chen,Changduk Yang,Long Ye,Harald Ade,Xiaozhang Zhu +8 more
TL;DR: Detailed X-ray scattering investigations indicate that the B DT3TR-SF:NBDTP-M blend exhibits a blend morphology featuring fine interpenetrating networks with smaller domains and higher phase purity, which results in more efficient charge generation, more balanced charge transport, and less recombination compared to the low-performance BDT3 TR-SF; NBDTTP- M blend.
Journal ArticleDOI
Roll-to-roll micro-gravure printed P3HT:PCBM organic solar cells
Hengyue Li,Chujun Zhang,Junfeng Wei,Keqing Huang,Xiaotong Guo,Yu Yang,Shu Kong So,Qun Luo,Chang-Qi Ma,Junliang Yang +9 more
TL;DR: In this article, the phase separation of R2R micro-gravure printed active layer of P3HT:PCBM OSCs was optimized using solvent engineering to create an optimal phase separation and a fine-tuned interpenetrating network.
Journal ArticleDOI
Fused nonacyclic electron acceptors with additional alkyl side chains for efficient polymer solar cells
TL;DR: In this paper, three new non-fullerene acceptors with the core of a fused nonacyclic unit and the end-capping groups of 3-dicycanovinylindan-1-one are designed and synthesized for polymer solar cells.
References
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Journal ArticleDOI
An electron acceptor challenging fullerenes for efficient polymer solar cells.
TL;DR: A novel non-fullerene electron acceptor (ITIC) that overcomes some of the shortcomings of fullerene acceptors, for example, weak absorption in the visible spectral region and limited energy-level variability, is designed and synthesized.
Journal ArticleDOI
Fullerene-Free Polymer Solar Cells with over 11% Efficiency and Excellent Thermal Stability
TL;DR: A nonfullerene-based polymer solar cell (PSC) that significantly outperforms fullerene -based PSCs with respect to the power-conversion efficiency and excellent thermal stability is demonstrated for the first time.
Journal ArticleDOI
25th anniversary article: Bulk heterojunction solar cells: understanding the mechanism of operation.
TL;DR: The status of understanding of the operation of bulk heterojunction (BHJ) solar cells is reviewed and a summary of the problems to be solved to achieve the predicted power conversion efficiencies of >20% for a single cell is concluded.
Journal ArticleDOI
Energy-Level Modulation of Small-Molecule Electron Acceptors to Achieve over 12% Efficiency in Polymer Solar Cells
TL;DR: The two new SMAs (IT-M and IT-DM) end-capped by methyl-modified dicycanovinylindan-1-one exhibit upshifted lowest unoccupied molecular orbital (LUMO) levels, and hence higher open-circuit voltages can be observed in the corresponding devices.
Journal ArticleDOI
Fast charge separation in a non-fullerene organic solar cell with a small driving force
Jing Liu,Shangshang Chen,Deping Qian,Bhoj Gautam,Guofang Yang,Guofang Yang,Jingbo Zhao,Jonas Bergqvist,Fengling Zhang,Wei Ma,Harald Ade,Olle Inganäs,Kenan Gundogdu,Feng Gao,He Henry Yan +14 more
TL;DR: In this article, fast and efficient charge separation is essential to achieve high power conversion efficiency in organic solar cells (OSCs), and in state-of-the-art OSCs, this is usually achieved by a significant driv