Related references
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Article
Materials Science, Multidisciplinary
Zicheng Ding et al.
Summary: By controlling phase separation and crystallization, a new type of stretchable organic solar cells (OSCs) is achieved by blending polymer donor PM6 and non-fullerene acceptor Y6 with elastomer SEBS. The addition of high-boiling point solvent additive CN dramatically alters the aggregation dynamics and film solidification process, resulting in improved molecular ordering and mechanical properties.
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(2023)
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Summary: Fabrication of high-efficiency organic solar cells using nonhalogen green solvents is desired, but the morphology control of the active layer remains challenging. In this study, a two-step heating strategy is proposed to optimize the morphology of the active layer based on a low-cost polymer donor and a small molecule acceptor. This strategy improves the charge generation, transport, and collection efficiency, resulting in a significantly higher device efficiency compared to nonoptimal conditions.
Article
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Daniel Corzo et al.
Summary: Accelerating the shift towards renewable materials and sustainable processes is crucial for a green circular economy. Terpene solvents obtained from renewable feedstocks can replace environmentally hazardous solvents in the production of efficient organic electronic devices. Using a solubility ink formulation framework, we identified various terpene solvent systems and investigated film formation and drying mechanisms for optimal charge transport. This approach is universal for state-of-the-art materials in organic electronic devices.
Article
Chemistry, Multidisciplinary
Yiming Shao et al.
Summary: Simple structured non-fused ring acceptors (NFRAs) and polymer donors are crucial for the application of organic solar cells (OSCs) due to their low cost and simple synthesis. In this study, two isomerized NFRAs, 4T-FClFCl and 4T-2F2Cl, were designed with end-group engineering to modulate the electrostatic potential distributions and crystallinity of acceptors, resulting in improved intermolecular interactions. The OSC based on 4T-2F2Cl achieved a record-high efficiency of 16.31% when blended with a low-cost polymer donor PTQ10, which was attributed to the improved bulk heterojunction morphology and reduced non-radiative recombination loss.
SCIENCE CHINA-CHEMISTRY
(2023)
Article
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Qiuju Liang et al.
Summary: Organic solar cells based on nonfullerene blend systems have attracted wide attention and become crucial for clean energy due to their advantages of broad absorption, semitransparency, and large-area solution processing. The power conversion efficiency of these solar cells has reached more than 19% through molecular design, device structure optimization, and morphology regulation. The morphology of the active layer plays a significant role in device performance, and precise morphology control is challenging.
ACTA PHYSICO-CHIMICA SINICA
(2023)
Article
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Zhongxiang Peng et al.
Summary: The morphology evolution of a ternary polymer: nonfullerene blend PM6: N3: N2200 under different blade coating conditions was studied. Real-time synchrotron X-ray scattering and in situ UV-vis spectroscopy were used to probe the morphological changes. The ternary blend showed optimized morphology and improved photovoltaic performance compared to the binary blend. Both binary and ternary blends achieved optimized morphology and photovoltaic properties at medium coating speed.
ADVANCED FUNCTIONAL MATERIALS
(2023)
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Pengqing Bi et al.
Summary: In this study, a multiscale fibril network morphology is constructed in a PBQx-TCl:PBDB-TF:eC9-2Cl-based system by regulating phase-transition kinetics. The ideal fibril network morphology enables superior charge transfer and transport processes, resulting in enhanced photon utilization efficiency. The optimized ternary cell achieves a high power conversion efficiency of 19.51% in a single-junction OPV cell. Furthermore, a tandem OPV cell with an excellent PCE of more than 20% is fabricated to increase solar photon absorption. This study provides guidance for constructing an ideal multiscale fibril network morphology and improving the photon utilization efficiency of OPV cells.
ADVANCED MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Haojie Li et al.
Summary: Green solvent-treated organic solar cells (OSCs) have shown great potential for commercialization, but the challenges of low solubility and high boiling point of green solvents hinder the exploration and tuning of morphology, impacting the photovoltaic properties. This review summarizes recent research advances in green solvent-treated OSCs and discusses solvent selection strategies and optimization strategies for green printing. Additionally, it provides in-depth analysis of optimization strategies for OSCs fabricated using large-area printing processes, offering theoretical guidance for the large-scale fabrication of organic photovoltaic (OPV) modules.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
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Di Wang et al.
Summary: The study demonstrates that high-performance organic solar cells (OSCs) can be obtained from hot spin processing of different non-halogenated solvents, achieving the highest reported efficiency of OSCs so far. The phase evolution of ternary blends during solution-to-solid transition is found to be correlated to the substrate temperature, and optimal blend films can be secured in various non-halogenated solvents with elevated substrate temperature. As a result, high-performance OSCs with excellent power conversion efficiencies have been achieved in o-xylene, p-xylene, and toluene, respectively, representing the best-performing OSCs made from non-halogenated solvents to date.
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(2022)
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Xiaoyu Liu et al.
Summary: A new method has been developed to manipulate the fluidics of sol-gel ZnO precursor and optimize processability of ZnO layer for flexible OSCs by changing Lewis base. This method results in high-quality ZnO layers suitable for flexible OSCs with improved photostability, achieving a power conversion efficiency of 16.71%, the best value reported so far.
ADVANCED MATERIALS
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Summary: The star-shaped nitrogen heterocyclic-ring acceptor TF1 was introduced into the PM6:Y6 system to suppress the excessive aggregation of Y6, resulting in improved stability and performance of OSCs. The incorporation of TF1 led to enhanced short circuit current density, elevated charge transfer state energy, increased exciton lifetime and diffusion distance, and accelerated hole transfer rate in ternary OSCs. This strategy not only achieved significantly improved efficiency and stability, but also elucidated the inner workings of star-shaped small molecules in ternary OSCs.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Review
Chemistry, Multidisciplinary
Yahui Liu et al.
Summary: In recent years, organic solar cells (OSCs) have made significant progress with power conversion efficiencies (PCEs) over 18%, showing promising practical applications. Key research focuses in the OSC field include development in material science and interface materials. The article systematically summarizes the recent progress in these areas and discusses current challenges and future developments.
SCIENCE CHINA-CHEMISTRY
(2022)
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Xin Song et al.
Summary: A new strategy called tunable nonhalogenated solvent engineering (TSE) was proposed in this study, which improved the performance and efficiency of organic solar cells prepared with non-halogenated solvents by mixing carbon disulfide and o-xylene.
Article
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Xin Song et al.
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ADVANCED MATERIALS
(2022)
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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)
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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%.
Review
Chemistry, Multidisciplinary
Yahui Liu et al.
Summary: This review examines the rapid development of organic solar cells and highlights the importance of device engineering in achieving high power conversion efficiency. The challenges, problems, and future developments in this field are also discussed.
SCIENCE CHINA-CHEMISTRY
(2022)
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Ke Hu et al.
Summary: A new small-molecule acceptor-based polymerized solar cell (PYCl-T) with high efficiency and thermal stability was designed and synthesized using a ternary blending system.
SCIENCE CHINA-CHEMISTRY
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Yueling Su et al.
Summary: This study successfully manipulated the charge generation process in the active layer by controlling film microstructures, leading to improved efficiency in non-fullerene acceptor-based organic solar cells.
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Summary: Rationally utilizing and developing synthetic units is crucial for designing high-performance non-fullerene small-molecule acceptors. In this study, four acceptors were developed based on a thieno[3,2-b]pyrrole synthetic unit, showing improved photovoltaic properties and energy utilization compared to the standard acceptor IT-4Cl. The ThPy3-based device achieved the highest PCE and excellent FF, while the ThPy4-based device achieved the lowest energy loss and smallest optical band gap.
NATIONAL SCIENCE REVIEW
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Xiyue Yuan et al.
Summary: A new promising electron donor polythiophene has been developed for organic solar cells, which shows improved performance due to cyano-group substitutions and varied fluorination degrees. The incorporation of cyano-group provides deep-lying energy levels, and fluorination leads to enhanced interchain interaction and improved crystallinity, resulting in a record efficiency of 17.2% in the new polythiophene-based solar cells.
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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.
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(2022)
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Jia Yao et al.
Summary: The synthesis of PDINN-F and PDINN-2F as cathode interlayer (CIL) materials through a simple fluorination method has shown improved energy level alignment at the NIR-SMAs/CIL interface, leading to favorable electron extraction efficiency. PDINN-F exhibits higher electron mobility and better interfacial compatibility.
ADVANCED MATERIALS
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Yanan Wei et al.
Summary: The variation of the vertical component distribution has a significant impact on the photovoltaic performance of organic solar cells. This study demonstrates that sequential deposition of materials can improve the efficiency of solar cells.
ADVANCED MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Jin Su Park et al.
Summary: This article provides a comprehensive overview of fully stretchable organic solar cells (f-SOSCs), which are designed to operate reliably under various forms of mechanical stress. The mechanical requirements and evaluation methods of f-SOSCs are summarized, and key studies and improvements for each layer are discussed. The current challenges and future prospects of f-SOSC research are also explored.
ADVANCED MATERIALS
(2022)
Article
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Jingwei Xue et al.
Summary: Organic solar cells (OSCs) have shown great potential, but traditional methods and toxic solvents limit their commercialization and efficiency. A dual-slot-die sequential processing (DSDS) strategy is proposed to overcome these limitations. The unique film-formation mechanism contributes to the improved performance.
ADVANCED MATERIALS
(2022)
Review
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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
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Ruijie Ma et al.
Summary: In this study, we fabricated ternary organic solar cells with high efficiency and decent performance by combining two donor polymers using a simple synthesis method. Our results indicate that the optimal morphology of the ternary blend is achieved through the coupling and competition between PTQ10 and PTVT-T, leading to efficient charge transport and suppressed bimolecular recombination. Furthermore, the optimized solvent-vapor-assisted casting method improved the efficiency of the optimal system to 19.11%.
ACS ENERGY LETTERS
(2022)
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Yin Wu et al.
Summary: In this study, we successfully increased the H-aggregates and improved the hole mobility of a printed diketopyrrolopyrrole-based polymer film by selectively modulating the side chain aggregation in the solution state and backbone aggregation during film formation. This work not only provides a promising route towards high-mobility printed conjugated polymer films but also reveals the important relationship between assembly pathways and film microstructure.
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Xiaochen Wang et al.
Summary: The design and development of low-cost and efficient photovoltaic materials is a major challenge for polymer solar cells (PSCs). In this study, a highly promising electron-donating polymer X1 with a simple chemical structure was synthesized. The carboxylate substituents on the polymer gave it good solubility, low-lying highest occupied molecular orbital (HOMO) energy level, and superior absorption. PSCs based on X1 as the donor achieved a high power conversion efficiency of 16.6% and a remarkable short-circuit current density of 27.07 mA cm(-2). This research shows the potential of carboxylated BDT as an effective building block for high-performance photovoltaic materials.
SCIENCE CHINA-CHEMISTRY
(2022)
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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
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Hui Chen et al.
Summary: The performance of polymer solar cells processed by non-halogenated solvents was enhanced by designing and synthesizing a dissymmetric fused-ring acceptor BTIC-2Cl-gamma CF3, achieving a PCE of over 17% and showing significant advantages in storage and photo-stability, while extending the absorption peak to 852 nm.
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Baobing Fan et al.
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