Related references
Note: Only part of the references are listed.
Review
Chemistry, Physical
Qiuju Liang et al.
Summary: BHJ organic photovoltaics are highly promising for green energy technology, but optimizing the morphology of the active layer is crucial. The addition of solid additives has become a popular strategy, but the relationship between additive properties and active layer morphology is still unclear.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Tianyi Chen et al.
Summary: A mixed diluent strategy, involving high bandgap NFA (BTP-S17) and low bandgap NFA (BTP-S16), is proposed to improve the device efficiency of organic photovoltaics (OPVs). The combination of BTP-S17 and BTP-S16 enables a better compromise between charge generation and recombination, leading to a high device performance of 19.76%.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Bo Pang et al.
Summary: A series of new wide bandgap (WBG) polymers were developed by introducing S, F, and Cl atoms to the alkylthienyl sidechains on BDT, resulting in lowered energy levels and enhanced aggregation properties. Among them, PBTz-F exhibited a low-lying HOMO level and stronger face-on packing order, leading to a high-power conversion efficiency (PCE) of 18.57% in the PF-BTz:L8-BO blend. It also showed good batch-to-batch reproducibility and general applicability. Furthermore, ternary blend OSCs based on the PBTz-F:L8-BO blend achieved a further enhanced PCE of 19.54%, one of the highest values in OSCs.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jianqiu Wang et al.
Summary: This study proposes the use of 3,5-dichlorobromobenzene (DCBB) to manipulate the morphology of bulk-heterojunction organic solar cells (OSCs), resulting in improved operability and photostability. Simulation experiments reveal the charge distribution and non-covalent interaction of DCBB with active layer materials. The addition of DCBB effectively tunes the aggregation behavior during film formation, leading to a phase separation and molecular packing that enhances the power conversion efficiency to 19.2%.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Kerui Liu et al.
Summary: The p-expansion of non-fullerene acceptors is an effective method for improving the performance of organic photovoltaics. In this study, highly efficient organic solar cells (OSCs) were fabricated using a 2D p-expansion strategy to design new non-fullerene acceptors. The optimized morphology and rational phase separation achieved through this strategy lead to efficient exciton dissociation and inhibited charge recombination, resulting in a high power conversion efficiency (PCE) of 18.2% in binary OSCs and a superior PCE of 19.1% in ternary devices. These results highlight the importance of the 2D p-expansion strategy in regulating the electronic structures and crystalline behaviors of non-fullerene acceptors for achieving superior photovoltaic performance.
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
Guowei Wu et al.
Summary: Additives play an important role in fabricating high-performance polymer solar cells (PSCs) by interacting efficiently with key photovoltaic materials. However, the study of improving the interaction between acceptor materials and high-performance halogenated aromatic additives, such as diiodobenzene (DIB), is often ignored. In this study, two novel Y-type acceptor molecules with different aromatic side chains were designed and synthesized, which significantly enhanced the interaction between the acceptor molecules and DIB, resulting in improved crystallinity and better photovoltaic performance. High power conversion efficiencies of 18.04% and 19.22% were achieved using BTP-TTS as the acceptor and DIB as the additive in binary and ternary blend devices. Aromatic side chain engineering proved to be an effective strategy for achieving higher performance photovoltaic materials and devices.
Article
Multidisciplinary Sciences
Jiehao Fu et al.
Summary: The authors achieved the suppression of non-radiative recombination loss and improved the performance of organic solar cells by regulating the self-organization of bulk-heterojunction in a non-monotonic manner. The efficiency of the organic solar cells reached over 19% with a low non-radiative recombination loss of 0.168 eV.
NATURE COMMUNICATIONS
(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, Multidisciplinary
Min Deng et al.
Summary: Raising the LUMO energy level of Y-type non-fullerene acceptors can increase the V-oc and photovoltaic performance of polymer solar cells. Steric hindrance introduced by branched alkyl chains can reduce intermolecular aggregation and raise the LUMO energy level. By adopting outer branched side chains and inner cyclohexane side chains, two new Y-type non-fullerene acceptors show outstanding V-oc and PCE values, demonstrating the potential of cyclohexane side chains in constructing high-performance non-fullerene acceptors and their PSCs.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xiaopeng Xu et al.
Summary: Sequential deposition is used to fabricate multicomponent organic solar cells with a double-bulk heterojunction structure, improving light absorption and morphology without complex optimization. The power conversion efficiency is improved from 18.25% to 19.61% compared to binary blend OSCs, while a quaternary blend of OSCs shows a reduced efficiency of 15.83%. This demonstrates the potential of the double-BHJ strategy in enhancing the performance of OSCs.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Chenyu Han et al.
Summary: Research on organic solar cells (OSCs) has focused on material innovation and device engineering. This study investigates the complicated relationship between photovoltaic conversion and multidimensional intermolecular interactions in OSCs. The results emphasize the importance of these interactions in improving the efficiency of OSCs.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Mingwei Zhou et al.
Summary: In this study, a new method of using conjugated polymers as additives to optimize the morphology of layer-by-layer organic solar cells (LbL-OSCs) is reported. By optimizing the morphology through side chain engineering, the addition of P-Cl as an additive facilitates the penetration of BTP-eC9 and forms an intertwined D/A network, leading to improved charge separation and collection efficiency. The optimized morphology significantly contributes to the photovoltaic performances of LbL-OSCs.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Lian Zhong et al.
Summary: Volatile solid additives are effective in optimizing morphology and improving the power conversion efficiencies of organic solar cells. This study focuses on the impact of a highly crystalline solid additive, phenoxathiin, on the formation of morphology and photovoltaic performance in D18-Cl:N3-based OSCs. The solid additive extends the formation time of the active layer, allowing for sufficient time for acceptor aggregation, and after thermal annealing, the solid additive facilitates better alignment of molecules and forms a favorable hybrid morphology, leading to an outstanding PCE of 18.47%.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xiaoning Wang et al.
Summary: The importance of guest distribution in ternary organic solar cells is highlighted in this study, and the primary driving forces to regulate guest distributions are outlined. Optimized internal molecular distributions can maximize the performance of the cells.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Peixi Wu et al.
Summary: A new wide bandgap polymer donor PBBTz-Cl is designed and synthesized, which shows promising potential for application in all-polymer solar cells. When paired with specific acceptor polymers, high power conversion efficiencies can be achieved.
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
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Xiangjian Cao et al.
Summary: A new volatile solid additive, 2,5-dichlorothieno[3,2-b]thiophene (TT-Cl), is explored to enhance the performance of organic solar cells (OSCs), resulting in power conversion efficiencies (PCEs) of 18.20% to 18.95%.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Xin Song et al.
Summary: By manipulating the film formation kinetics, the intermediate state engineering (ISE) strategy is proposed to achieve efficient, thickness-insensitive, and stable organic solar cells (OSCs). The addition of 1,3,5-tribromobenzene (TBr) triggers an intermediate phase and prolongs the aggregation kinetics, resulting in improved power conversion efficiency (PCE) by 20.1%. The ISE-treated device achieves a champion PCE of 17.8% in a thickness of 300 nm, representing one of the highest efficiencies in thick-film OSCs.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Zhihao Chen et al.
Summary: In this study, 1,3,5-trimethoxybenzene (TMB) was incorporated as a solid additive to restrict energetic disorder and achieve high efficiency in organic solar cells. TMB showed strong electrostatic interaction with the terminal groups of non-fullerene acceptors (NFAs), facilitating face-to-face packing. It acted as a bridge during film formation to connect adjacent NFAs, and a controlled pi-pi stacking distance was obtained after volatilization. The optimized morphology limited energetic disorder, leading to enhanced exciton delocalization and reduced non-radiative energy loss. TMB-incorporated binary and ternary devices achieved high efficiencies of 18.61% and 19.30%, respectively. This work provides new insights into morphology optimization and offers inspiration for improving organic solar cell performance.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Review
Chemistry, Multidisciplinary
Xiaopeng Xu et al.
Summary: This review provides an overview of the factors affecting the morphology of ternary blend organic solar cells (TB-OSCs) and summarizes the recent progress in morphology studies, including molecular crystallinity, molecular packing orientation, domain size and purity, etc. It also offers prospects for the future development of TB-OSCs.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Kaien Chong et al.
Summary: This work demonstrates highly efficient polymer solar cells by improving charge extraction and suppressing charge recombination through side-chain engineering, adopting ternary blends, and introducing volatilizable solid additives. The optimized molecular structure and blend morphology lead to improved fill factor and power conversion efficiency.
ADVANCED MATERIALS
(2022)
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
Rui Sun et al.
Summary: The ternary strategy is an effective approach to achieve high-efficiency OSCs, but the nonradiative voltage loss limits further efficiency improvements. By incorporating an asymmetric guest acceptor BTP-2F2Cl, the OSCs show improved photoluminescence quantum yield, exciton diffusion length, and absorption spectrum, leading to enhanced power conversion efficiency.
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
Chemistry, Multidisciplinary
Difei Zhang et al.
Summary: The incorporation of solid additives in organic photovoltaics can improve device performance and stability by adjusting molecular structure. By introducing a specific compound, processing methods can be simplified and batch differences can be reduced, providing guidelines for commercial applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Wei Gao et al.
Summary: By adopting the asymmetric selenium substitution strategy and using a pseudosymmetric electron acceptor, the power conversion efficiency of planar-mixed heterojunction organic solar cells (PMHJ OSCs) can be significantly improved. The increased dielectric constant and improved dimer packing lead to lower exciton binding energy, more efficient exciton dissociation, and reduced radiative recombination loss. These findings provide an effective way to develop highly efficient acceptor materials for OSCs.
ADVANCED MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Guichuan Zhang et al.
Summary: Organic photovoltaics (OPVs) have undergone three stages of development, including optimizing bulk heterojunctions, improving donor-acceptor match, and developing non-fullerene acceptors (NFAs). NFAs have resulted in higher power conversion efficiencies (PCEs) surpassing 15% due to reduced energy losses and increased quantum efficiencies. The review provides an update on recent progress in OPV technology, including novel NFAs and donors, understanding structure-property relationships, and commercialization challenges.
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)
Review
Chemistry, Multidisciplinary
Jiayu Wang et al.
Summary: Fused-ring electron acceptors (FREAs) with high tunability and excellent properties have revolutionized the field of organic solar cells. FREAs have achieved remarkable efficiencies of over 20% and potential operational lifetimes of up to 10 years.
NATURE REVIEWS CHEMISTRY
(2022)
Article
Chemistry, Physical
Lingling Zhan et al.
Summary: By adopting a ternary strategy to regulate the structure of symmetric-asymmetric non-fullerene acceptors, a balance between open-circuit voltage and short-circuit current density can be achieved in organic photovoltaics, leading to higher efficiency.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Lingzhi Guo et al.
Summary: Incorporating thiophene derivatives as solvent additives in organic solar cells can improve efficiency and fill factor. The FBrT solvent additive prolongs the crystallization and phase separation process of photovoltaic materials by dissolving donors and acceptors. The FBrT-treated solar cells exhibit improved exciton dissociation, charge transportation, extraction, and carrier recombination suppression.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Chengliang He et al.
Summary: Manipulating the donor:acceptor energetics is crucial for achieving balanced charge separation and recombination in organic solar cells (OSCs). In this study, a non-fullerene electron acceptor, BTP-H2, was designed and synthesized to pair with the polymer donor PM6, showing strong intermolecular interaction and near-zero highest occupied molecular orbital (HOMO) offset. The results demonstrated efficient charge separation and optimized energy conversion, leading to high-performance OSCs with a power conversion efficiency (PCE) of 18.5% and a peak photon-to-electron response of approximately 90%.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Physical
Zhijie Fu et al.
Summary: To increase the efficiency of organic solar cells, researchers have introduced a new volatile solid additive that enhances the morphology and orderliness of the active layer, resulting in higher mobility and power conversion efficiency. Additionally, the stability of the devices is greatly improved by this additive.
SUSTAINABLE ENERGY & FUELS
(2022)
Article
Chemistry, Multidisciplinary
Sunan Bao et al.
Summary: Controlling the self-assembly of organic semiconductors to form well-developed nanoscale phase separation is critical for building high-performance organic solar cells. A new approach utilizing the synergistic effect of DTT and CN is developed to tune the morphology of the photoactive layer, leading to a significant increase in power-conversion efficiency and fill factor in ternary OSCs processed with dual additives of CN and DTT.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
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.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Physical
Jiehao Fu et al.
Summary: Introducing a solid additive, 1,4-diiodobenzene (DIB), can enhance the active layer structure of organic solar cells (OSC) and improve performance.
DIB treated OSCs exhibit tighter molecular stacking and more ordered molecular arrangement, leading to increased power conversion efficiency.
In addition to performance enhancement, DIB treatment also improves device stability and is versatile for various types of OSCs.
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
Multidisciplinary Sciences
Jiehao Fu et al.
Review
Chemistry, Multidisciplinary
Caitlin McDowell et al.
ADVANCED MATERIALS
(2018)
Review
Chemistry, Physical
Fuwen Zhao et al.
ADVANCED ENERGY MATERIALS
(2018)
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Runnan Yu et al.
NATURE COMMUNICATIONS
(2018)
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Energy & Fuels
Jing Liu et al.
