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Article
Chemistry, Multidisciplinary
Baobing Fan et al.
Summary: Sequentially deposited organic solar cells (SD-OSCs) have received great attention due to their ability to achieve a more favorable morphology. However, the processing of SD-OSCs is challenging in preventing the penetration of small-molecule acceptors into the polymer donor layer. In this study, solid additives with varied electrostatic potential distributions and steric hinderance are introduced to investigate their effect on vertical component distribution.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xue Yang et al.
Summary: A novel volatile solid additive (VSA), 2-hydroxy-4-methoxybenzophenone (2-HM), is reported for achieving high-efficiency organic nonfullerene solar cells (ONSCs). It functions as a universal morphology-directing agent for several well-known nonfullerene blends, leading to a best efficiency of 18.85%. The study provides insights into the intrinsic kinetics of VSAs and brings new hope for improving the molecular ordering and film microstructure of ONSCs.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Lu Chen et al.
Summary: Currently, the use of benzo-dithiophene (BDT) units is dominating the development of high-efficiency organic photovoltaic devices. However, researchers have explored the use of benzo-difuran (BDF) units to diversify the choices of building blocks for donor polymers. In this study, a BDF-based polymer donor achieved the highest efficiency reported for BDF donor materials (18.4%) with the aid of a solid additive (2-chloronaphthalene), which showed significant effects in optimizing morphology and enhancing device parameters.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Tongle Xu et al.
Summary: This study investigates the design principles of small molecule acceptors (SMAs) for organic solar cells (OSCs) and reveals that the introduction of chlorine atoms can reduce intramolecular charge transfer effects while increasing LUMO values. Among the studied SMAs, Py5 with two chlorine atoms and Py2 with ortho chlorine substitution exhibit the best performance due to their larger dipole moments and smaller pi center dot center dot center dot pi stacking distances, which enable more efficient packing and aggregation behavior.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Manjun Xiao et al.
Summary: Additives are important for enhancing the performance of polymer solar cells (PSCs). However, typical additives used for optimizing blend morphology are high boiling-point solvents, which may reduce device stability due to their trace residues. In this study, a solidification of solvent additive (SSA) strategy was developed to convert the liquid additive to a solid form, resulting in optimized morphology, improved efficiency, and device stability.
SCIENCE CHINA-CHEMISTRY
(2023)
Article
Chemistry, Physical
Lingchen Kong et al.
Summary: Additive engineering is crucial for the development of organic solar cells (OSCs) as it allows precise regulation of the active layer morphology. In this study, solid additives with low melting points were comprehensively investigated and compared for their effects on OSC performance. The results showed that one of the additives, 1-chloro-4-iodobenzene (CIB), had the most significant enhancements on the absorption coefficients and carrier transports, leading to higher power-conversion efficiencies (PCEs) in OSCs. Furthermore, CIB also showed universality as an in situ removable additive, producing remarkable PCEs in various active layer compositions.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Mingwei An et al.
Summary: This study designs and synthesizes a new thiophene derivative, FETVT, and incorporates it into a polymer to form a high-performance polythiophene derivative PFETVT-T, which exhibits excellent compatibility with the acceptor L15 and achieves a record PCE of 11.81%. Remarkably, a ternary blend design further boosts the PCE of PFETVT-T to over 16%. These findings offer hope for high-performance, stable, and cost-effective polymer solar cells.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Yufei Wang et al.
Summary: The morphology of the active layer is crucial for improving the efficiency of organic solar cells (OSCs). In this study, three positional isomeric additives with bromine substituents were used to optimize the morphology of the active layer, resulting in higher efficiency of the OSCs. Additives with symmetric structures showed the best performance, forming suitable non-covalent interactions with the acceptor and improving molecular spatial distribution and pi-pi stacking behavior. This research provides guidance for designing additives with excellent morphology improvement capability, leading to increased efficiency of OSCs.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Dingqin Hu et al.
Summary: This study demonstrates that the use of a volatile solid additive, 1,8-dichloronaphthalene (DCN), can enhance the efficiency and stability of oligothiophene ASM-OSCs, making them commercially viable.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jing Guo et al.
Summary: High-performance all-polymer solar cells (all-PSCs) can be achieved by synthesizing two structural analogous polymerized small-molecule acceptors (PSMAs) and incorporating them into PM6:PY-IT binary blends to construct ternary all-PSCs, resulting in higher power conversion efficiency and improved photostability.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Donghui Li et al.
Summary: This study demonstrates the fibrillization of non-fullerene acceptors (NFAs) with the assistance of solvent additive to enhance the performance of organic solar cells (OSCs). The molecular dynamics simulations show that the additive enhances intermolecular packing and induces self-assembly of NFAs into fibril structures. The resulting OSCs show improved power conversion efficiency, light absorption, charge transport, and collection properties.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yunhao Cai et al.
Summary: Although all-polymer solar cells (all-PSCs) have great commercial potential, their power conversion efficiencies (PCEs) lag behind small molecule acceptor-based counterparts. Achieving optimized morphology and high molecular ordering in all-polymer blends is challenging due to competition between the crystallinity of the polymer donor and acceptor during film formation. In this study, a ternary strategy is employed to modulate the morphology and molecular crystallinity of an all-polymer blend, resulting in improved PCEs and performance.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Tao Zhang et al.
Summary: By designing and synthesizing three ternary copolymers, PQB-x (x represents 1-3), the optical absorption spectrum and molecular energy levels of all-polymer solar cells (all-PSCs) can be tuned, and the energetic disorder can be suppressed by changing the molecular orientation. This study demonstrates that molecular design is a feasible method for improving the power conversion efficiencies of all-PSCs.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Ruijie Ma et al.
ADVANCED MATERIALS
(2023)
Article
Multidisciplinary Sciences
Rui Zeng et al.
Summary: This study demonstrates a thin film organic photovoltaic technology integrated with nano-sized phase separation and micro-sized surface topology, which can harvest solar energy at different incident angles throughout the day. The all-polymer solar cells with hierarchical morphology and large light-receiving angle are suitable for commercial applications of distributed photovoltaics.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Xin Zhang et al.
Summary: By using noncovalent conformational locks (NoCLs), a pair of regioisomeric small-molecule donors (SMDs) has been synthesized, and the significant influence of regioisomeric effect on device performance has been demonstrated. Among different SMDs, BT-O2 exhibits better performance, and the introduction of fullerene derivative PC71BM further improves the performance.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Heng Zhao et al.
Summary: This study demonstrates a novel approach to achieve high-efficiency fabrication of large-area, thick organic solar cells using slot-die coating and a ternary strategy. By incorporating a highly crystalline molecule, BTR-Cl, the phase separation kinetics of the film is regulated, resulting in improved molecular crystallinity and vertical phase separation, leading to high power conversion efficiencies.
ADVANCED MATERIALS
(2022)
Article
Engineering, Environmental
Hailu Liu et al.
Summary: The study demonstrates that ternary polymerization is an efficient strategy to obtain high-performance all-polymer solar cells with green-solvent processing.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Xiaojing Wang et al.
Summary: This study systematically investigates the effect of additives on the performance of non-fullerene organic solar cells (OSCs) using high-efficiency non-fullerene systems as examples. Surprisingly, the introduction of the additive DIO leads to an unprecedented change in V-OC (open-circuit voltage) in the opposite direction of the two typical systems, which can be influenced by morphological differences and energy level variations. Molecular dynamic and density functional theory calculations are included to understand the additive-induced morphological differences and energy level changes. The origin of unforeseeable V-OC changes caused by additives in non-fullerene OSCs is clarified, providing insights into the effects of additives on device performance.
Article
Chemistry, Multidisciplinary
Xin Song et al.
Summary: A novel process-aid solid (PAS) engineering with asymmetric configuration is proposed to improve the microphase separation and component distribution of organic solar cells, leading to enhanced exciton splitting and charge collection efficiency.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Wenqing Zhang et al.
Summary: In this study, a third polymer donor, PTQ10, was introduced to finely tune the energy-level matching and microscopic morphology of the polymer blend photoactive layer in all-polymer solar cells (all-PSCs). The addition of PTQ10 improved the charge separation and transport efficiency, resulting in a high power conversion efficiency (PCE) of 16.52%. Furthermore, the all-PSCs exhibited a high tolerance of the photoactive layer thickness, achieving high PCEs of 15.27% and 13.91% at thick photoactive layer thicknesses, which are the highest reported for all-PSCs.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Lei Zhu et al.
Summary: Morphological control of donor and acceptor domains is crucial for efficient organic photovoltaics, and this study demonstrates a double-fibril network strategy to achieve a high power conversion efficiency of 19.3%.
Article
Energy & Fuels
Youyu Jiang et al.
Summary: Researchers have developed an alcohol-dispersed PEDOT formulation for efficient and stable organic solar cells. The formulation shows good wetting properties and low acidity, avoiding the drawbacks of aqueous PEDOT:PSS. Organic photovoltaics based on PEDOT:F achieved a power conversion efficiency of 15% and retained 83% of the initial efficiency after 1,330 hours of continuous illumination.
Article
Chemistry, Multidisciplinary
Jie Yang et al.
Summary: By varying the positions of sulphur atoms in HTMs, the performance of perovskite solar cells can be improved, leading to enhanced efficiency and stability.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Congqi Li et al.
Summary: Volatile solid additives (SADs) are a simple and effective method to adjust the film morphology of high-performance organic solar cells (OSCs). This study designed and synthesized two volatilizable SADs, and the results revealed that the planar SAD2 can more easily insert between Y6 molecules, leading to a tighter molecular packing mode and improved photovoltaic performance.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Energy & Fuels
Youcai Liang et al.
Summary: Oligomer acceptors improve the molecular packing and morphology of organic solar cells, resulting in a 15% efficiency and enhanced stability.
Article
Chemistry, Physical
Xin Liu et al.
Summary: TOPVs present the potential for building integration windows, with a critical challenge being the trade-off between AVT and PCE. By integrating an ABPF, a superior transparent rear electrode was designed and constructed, showing significant enhancements in AVT and LUE compared to counterparts without ABPF.
Article
Chemistry, Multidisciplinary
Jie Yang et al.
Summary: This study explores the potential of Bithiophene imide (BTI)-based polymers as attractive photovoltaic materials in non-fullerene organic solar cells. By fine-tuning the aggregation and orientation of BTI-based donor-pi-acceptor (D-pi-A) polymer donors, it was possible to achieve high compatibility with non-fullerene electron acceptors (NFEAs) and achieve significantly higher power conversion efficiency compared to analogues with different alkyl chains.
CHINESE JOURNAL OF CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Jiali Song et al.
Summary: The study demonstrates that the incorporation of 2-methoxynaphthalene (2-MN) into PM6:PY-DT blend can effectively manipulate the aggregations of molecules and achieve high efficiency for all-polymer solar cells (all-PSCs). The use of 2-MN as a green and solid additive is a simple and feasible strategy to optimize morphology, promoting eco-friendly fabrication and application of all-PSCs.
Article
Chemistry, Multidisciplinary
Ke Hu et al.
Summary: This study utilizes non-halogenated solvent toluene and volatilizable DTT solid additive to process all-polymer solar cells, achieving eco-friendly and high efficiency. The DTT solid additive fine-tunes the aggregation of polymer donors and acceptors, resulting in active layers with appropriate domain size and high purity, leading to improved performance of the all-polymer solar cells.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Review
Chemistry, Multidisciplinary
Zhi-Guo Zhang et al.
Summary: All-polymer solar cells have attracted significant research interest due to their good film formation, stable morphology, and mechanical flexibility. The strategy of polymerizing small-molecule acceptors to construct new-generation polymer acceptors has significantly increased the power conversion efficiency, but current challenges and future prospects still need to be addressed.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Tao Wang et al.
Summary: This study investigated the effects of regioisomerized structures on the molecular and photovoltaic properties of near-infrared polymer acceptors (P(A)s) constructed from n-type fused-ring electron acceptors (FREAs). The results showed that the PYTT-2 system had the best photovoltaic performance and stability among the three isomeric FREA-based P(A)s.
CHEMISTRY OF MATERIALS
(2021)
Article
Multidisciplinary Sciences
Ming Zhang et al.
Summary: By using quaternary blends, double cascading energy level alignment is achieved in bulk heterojunction organic photovoltaic active layers, optimizing light absorption, carrier transport, and charge-transfer state energy levels for higher power conversion efficiencies. The chemical structures of donors and acceptors allow control over electronic structure and charge-transfer state energy levels, enabling manipulation of hole-transfer rates, carrier transport, and non-radiative recombination losses.
NATURE COMMUNICATIONS
(2021)
Article
Energy & Fuels
Haiyang Chen et al.
Summary: The research team successfully achieved power conversion efficiencies of over 17% in organic solar cells processed from green solvent paraxylene (PX) using a guest-assisted assembly strategy. This approach improved device operational stability and enabled uniform deposition on large-area modules with high efficiency, paving the way for industrial development of organic solar cells.
Article
Energy & Fuels
Chao Li et al.
Summary: The molecular design of acceptor and donor molecules has significantly advanced organic photovoltaics. By introducing branched alkyl chains in non-fullerene acceptors, favorable morphology in the active layer can be achieved, leading to a certified device efficiency of 17.9%. This modification can completely alter the molecular packing behavior of non-fullerene acceptors, resulting in improved structural order and charge transport in thin films.
Article
Chemistry, Physical
Rui Sun et al.
Summary: The study focuses on developing high-performance all-polymer solar cells by designing a novel polymer acceptor PY2F-T and enhancing efficiency through ternary blend with PYT in the PM6: PY2F-T host system. This approach significantly improves power conversion efficiency and stability, marking a promising future for the application of all-PSCs.
Article
Chemistry, Multidisciplinary
Xue Zhang et al.
Summary: The study introduces solid but volatile additives to replace common liquid additives with high boiling points in nonfullerene organic solar cells, showing improved efficiency and operational stability through molecular dynamics simulations. This universal strategy enhances pi-pi stacking among nonfullerene acceptor molecules and demonstrates significant improvements in efficiency and operational lifetime in various OSC systems.
Article
Chemistry, Multidisciplinary
Bin Liu et al.
Summary: The use of halogen-free solvents can produce efficient and environmentally friendly all-polymer solar cells. In this study, all-PSCs processed with o-XY solvent achieved remarkable performance, demonstrating potential for practical applications.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Polymer Science
Zhen-Ye Li et al.
CHINESE JOURNAL OF POLYMER SCIENCE
(2020)
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Polymer Science
Xue Zhang et al.
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Zhenghui Luo et al.
ADVANCED ENERGY MATERIALS
(2020)
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Youqin Zhu et al.
ADVANCED ENERGY MATERIALS
(2019)
Review
Chemistry, Multidisciplinary
Changyeon Lee et al.
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Hanliang Zheng et al.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2019)
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Zhixiong Cao et al.
CHEMISTRY OF MATERIALS
(2019)
Review
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Gang Wang et al.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2019)
Review
Chemistry, Multidisciplinary
Zewdneh Genene et al.
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(2019)
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Xiaoyan Du et al.
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Yinyin Bao et al.
CHEMISTRY OF MATERIALS
(2016)
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Yankang Yang et al.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2016)
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Jun Zhang et al.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2016)
Review
Chemistry, Multidisciplinary
D Van der Spoel et al.
JOURNAL OF COMPUTATIONAL CHEMISTRY
(2005)
Review
Chemistry, Multidisciplinary
A Rajca et al.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2004)
