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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
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Qunping Fan et al.
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Wenyan Yang et al.
Summary: The research found that as the thickness of the active layer of organic solar cells decreases, the thermal stability gradually increases, leading to the development of a new industrial index, i-FOM2.0, which helps address the balance between efficiency, stability, and cost, and accelerates the commercialization of OSCs.
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Li Zhang et al.
Summary: The study focused on the development and characterization of two newly synthesized brominated SMAs, F8IDT-Br and C8IDT-Br, which showed excellent performance and stability in organic solar cells. The results demonstrate that bromination of non-fused SMAs can further improve relevant device performance, indicating the potential for these materials in enhancing efficiency of OSCs.
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Summary: Four simple nonfused ring electron acceptors were designed and synthesized, with CH3-2F showing the highest power conversion efficiency. The substituent group at the diphenylamine unit has a significant impact on the absorption and energy level of acceptors, electron mobility, and morphology of blend films. The use of diphenylamine derivatives as the flanking group can improve solubility, avoid oversized aggregates, and enhance intramolecular charge-transfer effects.
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Summary: Two novel nonfused-ring electron acceptors (N-FREAs), DTP-out-F and DTP-in-F, containing a 2,5-difluorophenylene core with DTP blocks and IC-2F terminals, were designed and synthesized. The isomerization of DTP to 2,5-difluorophenylene affected the overall properties of the N-FREAs, leading to improved power conversion efficiency. The isomerization strategy shows great potential in developing high-performance N-FREAs.
ACS APPLIED MATERIALS & INTERFACES
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Jinfeng Huang et al.
Summary: The study introduces two new quinoxaline-based NCAs, QOC6-4H and QOC6-4Cl, with the latter showing improved optical absorption, carrier mobilities, and charge recombination suppression. The device based on PBDB-T:QOC6-4Cl achieved a notable power conversion efficiency and higher short-current density, demonstrating that chlorination of end groups is an effective strategy to enhance intermolecular interactions and photovoltaic performance of NCAs.
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Huiliang Sun et al.
Summary: The study successfully improved the efficiency of all-polymer solar cells by synthesizing narrow-bandgap polymer acceptors with regular structures. By introducing a ternary system with different components, further optimization of blend morphology and charge transport was achieved, leading to an enhanced power conversion efficiency.
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Yong Cui et al.
Summary: By combining material design and ternary blending strategy, a maximum power conversion efficiency of 19.0% is achieved in single-junction OPV cells. Optimized active layer structure significantly improves the photovoltaic parameters, enhancing the performance and PCE values of the cells.
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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
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Yuxiang Li et al.
Summary: This study successfully optimized the film structure of polymer solar cells by systematically adjusting the molecular aggregation patterns of unfused non-fullerene acceptors (UF-NFAs), leading to improved efficiency of the photovoltaic devices.
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Lijiao Ma et al.
Summary: Non-fullerene acceptors based on non-fused conjugated structures have potential for low-cost organic photovoltaic cells, but their efficiencies are lower than those of fused-ring NFAs. A new bithiophene-based non-fused core, TT-Pi, was designed, leading to the development of a completely non-fused NFA, A4T-16, which achieved a high PCE of 15.2% with 84% retention after 1300 hours under simulated AM 1.5 G illumination. This work provides insight into molecule design of non-fused NFAs through molecular geometry control.
NATURE COMMUNICATIONS
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Xian-Kai Chen et al.
Summary: Researchers provide a general description of non-radiative voltage losses and find that the latest organic solar cells based on non-fullerene acceptors can reduce this loss. The study shows that photoluminescence yield is a critical factor in determining the lower limit of non-radiative voltage losses.
Review
Chemistry, Multidisciplinary
Long Ye et al.
Summary: In the past decade, there have been significant advancements in the power conversion efficiency of organic photovoltaic cells, with polythiophenes showing great promise. Optimizing the structure and performance of polythiophenes in solar cells can drive progress in cost-effective electronics.
TRENDS IN CHEMISTRY
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Article
Chemistry, Multidisciplinary
Jiayu Wang et al.
Summary: A new fused-ring electron acceptor FNIC3 with controlled aggregation behavior was synthesized, showing strong absorption in the 600-900 nm range. The aggregation of FNIC3 significantly influences the photovoltaic device parameters, with appropriate aggregation enhancing the power conversion efficiency. Aggregates formed under proper film formation time exhibit a higher PCE compared to those formed under short or long film formation time.
Review
Chemistry, Multidisciplinary
Chaohua Cui et al.
Summary: Organic solar cells have unique advantages of light weight and low cost, with the morphology of the active layer being crucial for performance. Postdeposition treatments and additive treatments are effective in optimizing the morphology, leading to improved performance in organic photovoltaic applications.
Review
Energy & Fuels
Mingqun Yang et al.
Summary: Organic solar cells (OSCs) have seen rapid advancements in power conversion efficiencies with the emergence of non-fused ring acceptors (NFRAs) as potential replacements for the complex and costly multiple fused ring acceptors (NFAs). Challenges and future directions are discussed to achieve high performance and low synthetic complexity simultaneously in the development of new NFRAs for practical application in OSCs.
Article
Chemistry, Physical
Dou Luo et al.
Summary: This study demonstrates the use of electron-deficient diketone units in efficient non-fused ring electron acceptors for high-performance organic solar cells. By choosing appropriate building blocks, stronger molecular stacking can be achieved leading to improved device performance.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Review
Chemistry, Multidisciplinary
Lei Zhu et al.
Summary: The article reviews the importance of non-fullerene acceptors (NFAs) in organic solar cells (OSCs) and the key steps and influencing factors for morphology optimization. It examines the morphological characteristics and recent research progress of pi-conjugated molecular systems based on IDT and Y6, as well as n-type pi-conjugated polymers, with special attention to high-performance Y6-based NFAs. The article aims to provide useful information and guidance for morphology optimization and achieving higher efficiency devices.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Fuqiang Du et al.
Summary: The article discusses the importance of side-chain engineering on nonfullerene acceptors (NFAs) for optimizing their solubility and crystallinity in order to achieve high-performance organic solar cells (OSCs). The use of 7H-dibenzo[c,g]carbazole (DCB) as an electron-donating core in designing unfused-ring acceptors (UFAs) with low weight ratios of side chains is highlighted. The resulting DCB-4F material exhibits higher solubility and promising efficiency in OSCs when compared to traditional analogues, showing potential for achieving highly efficient as-cast OSCs.
MATERIALS HORIZONS
(2021)
Article
Chemistry, Physical
Zhuhao Wu et al.
Summary: The development of nonfullerene acceptors has greatly improved the power conversion efficiencies of polymer solar cells in the past years, with a focus on synthetic accessibility without organostannanes for commercial applications. This study successfully synthesized two high-efficiency simple small molecular nonfullerene acceptors through a ligand-free direct heteroarylation approach, demonstrating their similar optical properties and energy levels. The nonfullerene acceptor BDDEH-4F with 2-ethylhexyl side chains achieved a higher PCE and larger Jsc compared to BDDBO-4F, showcasing the promise of facile direct heteroarylation for cost-effective nonfullerene solar cells.
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Xiaojun Li et al.
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(2019)
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Jaewon Lee et al.
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(2019)
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Viktor V. Brus et al.
ADVANCED MATERIALS
(2019)
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Jie Zhou et al.
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Hao Huang et al.
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(2019)
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Zhi-Peng Yu et al.
NATURE COMMUNICATIONS
(2019)
Article
Chemistry, Physical
Yuan-Qiu-Qiang Yi et al.
CHEMISTRY OF MATERIALS
(2019)
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Zhang Zhongqiang et al.
ACTA PHYSICO-CHIMICA SINICA
(2019)
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Jun Yuan et al.
Review
Chemistry, Physical
Jianhui Hou et al.
Review
Optics
Pei Cheng et al.
Article
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Xueliang Shi et al.
ADVANCED ENERGY MATERIALS
(2018)
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Chemistry, Physical
Shuixing Li et al.
JOURNAL OF MATERIALS CHEMISTRY A
(2018)
Review
Energy & Fuels
Jianquan Zhang et al.
Review
Nanoscience & Nanotechnology
Cenqi Yan et al.
NATURE REVIEWS MATERIALS
(2018)
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Yuzhong Chen et al.
ADVANCED ENERGY MATERIALS
(2018)
Article
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Ning Wang et al.
MATERIALS CHEMISTRY FRONTIERS
(2018)
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Shuixing Li et al.
ADVANCED MATERIALS
(2018)
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Ailing Tang et al.
ADVANCED MATERIALS
(2017)
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Shuixing Dai et al.
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(2017)
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Bin Kan et al.
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(2017)
Review
Nanoscience & Nanotechnology
Gang Li et al.
NATURE REVIEWS MATERIALS
(2017)
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Zhi-Guo Zhang et al.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2017)
Review
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Jiayu Wang et al.
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Yuze Lin et al.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2016)
Article
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Yuze Lin et al.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2016)
Review
Materials Science, Multidisciplinary
Riccardo Po et al.
JOURNAL OF MATERIALS CHEMISTRY C
(2016)
Article
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Maojie Zhang et al.
ADVANCED MATERIALS
(2015)
Article
Chemistry, Multidisciplinary
Yuze Lin et al.
ADVANCED MATERIALS
(2015)
Article
Polymer Science
Riccardo Po et al.
Article
Multidisciplinary Sciences
Taesu Kim et al.
NATURE COMMUNICATIONS
(2015)
Article
Multidisciplinary Sciences
Yuhang Liu et al.
NATURE COMMUNICATIONS
(2014)
Article
Polymer Science
Deping Qian et al.