Related references
Note: Only part of the references are listed.
Article
Chemistry, Physical
Xiaoming Li et al.
Summary: Researchers have successfully expanded the light absorption range of all-polymer solar cells by introducing benzotriazole into the polymer acceptors. The resulting polymer acceptors exhibit higher open-circuit voltage and lower voltage loss, leading to a high efficiency of 16.58% for the ternary all-PSCs.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Xingpeng Liu et al.
Summary: The PM6:TBFCl50-BDD:IT-4F-based ternary device with non-halogenated solvent o-xylene and a similar structure component TBFCl50-BDD demonstrated enhanced crystallinity, improved charge transport and collection ability, and effective suppression of trap-assisted recombination and bimolecular recombination. The introduction of TBFCl50-BDD also accelerated exciton diffusion and promoted exciton dissociation, leading to a higher power conversion efficiency (PCE) of 12.8% compared to the PM6:IT-4F binary device (11.8%).
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Cong Xiao et al.
Summary: The effects of hybrid cycloalkyl-alkyl side chains on the single-crystal structures, optoelectronic and energetic properties of electron acceptors were investigated. Symmetric/asymmetric acceptors with 10-cyclohexyldecyl side chains were designed, synthesized, and compared. The introduction of the cyclohexyldecyl side chains resulted in decreased optical bandgap, deeper energy level, and closer packing of acceptor molecules, leading to improved performance of organic solar cells.
Article
Chemistry, Multidisciplinary
Jingwei Xue et al.
Summary: Researchers developed a strategy to control the crystallization kinetics and enhance the crystallinity of acceptors in organic solar cells by introducing a strong crystalline small molecule, BTR-Cl. This strategy enabled the fabrication of efficient devices without any post-treatment, achieving a remarkable power conversion efficiency of 17.50% via ambient air printing. The generalization of this strategy in other systems suggests its potential for universally fabricating high-efficiency and eco-friendly organic solar cells.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xunchang Wang et al.
Summary: New small molecule donors with symmetric/asymmetric hybrid cyclopentyl-hexyl side chains were designed to improve the power conversion efficiencies of organic solar cells. The manipulation of intermolecular interactions and morphology of the bulk heterojunction layer resulted in a significant enhancement in the performance of the solar cells.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Fuliang Cheng et al.
Summary: Terpolymerization and regioisomerization strategies are utilized to develop novel polymer donors for improving the performance of organic solar cells (OSCs). The study shows that the position of chlorine substituents significantly affects the molecular planarity and electrostatic potential (ESP), thereby influencing the aggregation behavior and miscibility of the donor and acceptor. The terpolymer PM6-TTO-10 exhibits enhanced coplanarity, crystallinity, aggregation behavior, and phase separation, leading to efficient exciton dissociation and charge transfer. Consequently, OSCs based on PM6-TTO-10 achieve a high power conversion efficiency of 18.37% with an outstanding fill factor of 79.97%, which are among the highest reported for terpolymer-based OSCs.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Qiaoling Chen et al.
Summary: In this work, the addition of poly(9-vinylcarbazole) (PVK) in the upper electron acceptor layer of layer-by-layer (LbL) processed organic solar cells (OSCs) has demonstrated improved performance through adjustments in film morphology, electron acceptor doping, increased electron concentration, and enhanced charge transport.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zhongwei Ge et al.
Summary: In this study, a small amount of Y6 was introduced into a PM6:PY-DT blend as a solid additive, which improved the molecular packing and phase separation, leading to enhanced power conversion efficiency and long-term stability. This Y6-assisted strategy is universally applicable to other all-polymer blends, paving the way for the fabrication of efficient and stable all-polymer solar cells.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jixiang Zhou et al.
Summary: The high trap density in organic solar cells is a major limitation for improving power conversion efficiencies. This study demonstrates that extending the donor core of nonfullerene acceptors from a heptacyclic unit to a nonacyclic unit efficiently reduces the trap density in the solar cells. This approach not only increases the mobility and inhibits charge-carrier recombination, but also achieves an impressive power conversion efficiency of 17.1% with a low nonradiative recombination energy loss.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Feiping Lu et al.
Summary: Researchers developed an organic-inorganic hybrid electron transport layer (ETL) using benzyl viologen dichloride (BV-2Cl) as a dopant for the preparation of sol-gel ZnO precursor solution. Inverted polymer solar cells (I-PSCs) based on PTB7-Th:PC71BM with hybrid ZnO:BV-2Cl as ETL showed significantly improved photovoltaic performance. The use of BV-2Cl as a dopant for ZnO ETL represents a facile and efficient method for the fabrication of high-performance I-PSCs.
Article
Multidisciplinary Sciences
Han Yu et al.
Summary: In this study, a poly(fullerene-alt-xylene) acceptor (PFBO-C12) was used as a guest component in ternary organic solar cells to achieve a significant increase in efficiency from 16.9% to 18.0%. The results showed that PFBO-C12 facilitated hole transfer and suppressed charge recombination while maintaining a favorable morphology with high crystallinity and smaller domain size. Additionally, the introduction of PFBO-C12 reduced voltage loss and improved the light stability and mechanical durability of all-polymer solar cells.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Meihui Liu et al.
Summary: The authors propose a molecular descriptor to measure intra-molecular noncovalent interactions, which is strongly correlated with the reorganization energy of excited or charged states. Through theoretical calculations and experimental validations, they reveal the essence of these interactions and their dependence on molecular geometry. This work provides a simple descriptor for characterizing the strength of noncovalent intramolecular interactions, which is significant for molecular design and property prediction.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Paula Hartnagel et al.
Summary: In the past years, high-performance organic solar cells have emerged, reducing the amount of energetic disorder in structurally disordered semiconductors. It is crucial to accurately characterize this disorder when searching for future high-efficiency material systems. Common techniques include optical excitation and external voltage measurements, with the former yielding lower values of energetic disorder compared to the latter. Electrical measurements probe different energy ranges than optical measurements due to subband-gap density of states. Limitations and discrepancies between measurement techniques are explained based on electronic parameters.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Tom P. A. van der Pol et al.
Summary: Insight into the identity and origin of defects in organic semiconductors is crucial for targeted strategies to overcome them. The study focuses on PM6:Y6 organic solar cells and reveals that defects are formed by a trace constituent in ambient air and O-3. Aging in H2O-saturated compressed air also increases the defect response by modifying the work function of MoO3. Measurement of energy resolved-electrochemical impedance spectroscopy and different cell structures confirm that defects mainly originate from PM6 and are located near the top electrode.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Yanan Shi et al.
Summary: Non-radiative recombination energy loss (△E-3) is the main source of energy losses in organic solar cells (OSCs). Reducing the energetic disorder by modifying terminal groups has rarely been studied. In this study, acceptors with fluorinated phenyl terminal groups were investigated. The results show that these acceptors have smaller energetic disorder and achieve high efficiency and ultralow △E-3.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Lijiao Ma et al.
Summary: The researchers have successfully achieved high efficiency and mechanical reliability in all-polymer organic photovoltaic (OPV) cells by introducing a polymer donor, PBDB-TF, with a high molecular weight. By adding the high molecular weight PBDB-TF as a third component into the PBQx-TF:PY-IT blend, they optimized the heterojunction morphology, enhancing charge transport efficiency and mechanical stress dissipation. As a result, the all-polymer OPV cells based on the ternary blend film showed a maximum power conversion efficiency (PCE) of 18.2% with a fill factor of 0.796. The flexible OPV cell also achieved a decent PCE of 16.5% with high mechanical stability. These findings provide a promising strategy for improving the mechanical properties and boosting the photovoltaic performance of all-polymer OPV cells.
ADVANCED 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
Shangfei Yao et al.
Summary: The organic solar cells (OSCs) based on block copolymer systems have the potential to achieve the optimal balance of power conversion efficiency (PCE) and stability, but the PCE of these devices is still low. To improve the efficiency, controlling the thin-film morphology is the key engineering, which can be achieved through precursor optimization and post treatments. In this study, a novel two-in-one annealing tactic is developed, which results in limited phase separation and well-connected domain distribution, leading to a record-breaking PCE of 16.08%. Additionally, a comprehensive study on different annealing methods is conducted, providing in-depth understanding with the help of various characterizations.
CHINESE JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Jianxiao Wang et al.
Summary: All-polymer solar cells (APSCs) with excellent mechanical and thermal stability have the most potential for flexible power supply systems. However, the strong interchain entanglement between conjugated polymers limits the advancement of photovoltaic performance. By using a miscible polymer donor PBB2-H, the molecular arrangement and phase-separation scale of the all-polymer active layer can be optimized for efficient exciton and carrier utilization. The ternary APSC with the PPHJ structure achieved a champion efficiency of 17.94% and showed great shelf stability and photostability.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Weigang Zhu et al.
Summary: Recent studies have shown that nonfullerene acceptors (NFAs) can achieve higher power conversion efficiencies (PCEs) compared to traditional fullerenes in polymer solar cells (PSCs). Understanding the relationship between film morphology, charge carrier dynamics, and photovoltaic performance is crucial for improving materials design and device engineering. Optimization of the incorporation of a fullerene, PC71BM, in a binary blend system can enhance PCE by increasing the charge carrier mobilities and reducing recombination. However, excessive PC71BM can lead to undesirable morphology changes and decreased performance.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Tian Zhong et al.
Summary: This study systematically evaluates the multi-scale mechanical properties of bulk-heterojunction (BHJ) films containing three representative electron acceptors. It is found that the films based on PC71BM, Y6, and PRi-C39 show sequential decreases in tensile modulus and increases in fracture strain and toughness. The nanoindentation moduli of the films based on these acceptors also vary accordingly. Creep analyses reveal a sequential decrease in creep deformation occurrence for the PC71BM, Y6, and PRi-C39-based films. Contact angle tests demonstrate that donor-acceptor interactions greatly affect the mechanical properties of these films. These findings highlight the importance of acceptor type in the multi-scale mechanical properties of BHJ films for the development of reliable flexible polymer solar cells (PSCs).
NPJ FLEXIBLE ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Tao Liu et al.
Summary: This study demonstrates that the three key merits of an all-polymer blend, PM6:PY-IT, can be simultaneously maximized by introducing a polymerized fullerene derivative, PPCBMB. The addition of this polymerized fullerene material improves the power conversion efficiency, device stability, and film ductility of the blend system. Morphology and device physics analyses show that the optimal ternary system possesses well-maintained molecular packing and crystallinity, which contribute to favorable charge transport and improved charge generation and ductility.
Article
Chemistry, Multidisciplinary
Xiaopeng Duan et al.
Summary: This study demonstrates the successful fabrication of efficient ternary organic solar cells by introducing ZY-4Cl as a third component. The ternary system exhibits reduced voltage loss, improved molecular ordering, and suppressed non-radiative recombination, leading to higher efficiencies compared to binary blends.
ENERGY & ENVIRONMENTAL SCIENCE
(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, Physical
Alberto Privitera et al.
Summary: This study investigates the formation mechanism of triplet excitons in organic solar cells, revealing differences in triplet formation between fullerene and nonfullerene acceptor systems. Engineering good donor and acceptor domain purity is crucial for suppressing losses via triplet excitons in OSCs.
ADVANCED ENERGY MATERIALS
(2022)
Article
Multidisciplinary Sciences
Christopher Woepke et al.
Summary: The stability of organic solar cells is crucial for their commercialization. This study investigates the thermal degradation of inverted photovoltaic devices based on the PM6:Y6 non-fullerene system and identifies trap-induced transport resistance as the primary cause of the drop in fill factor. By suppressing trap formation, device lifetimes could be significantly increased, offering a promising future for organic solar cells.
NATURE COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Qiaonan Chen et al.
Summary: This study explores the effects of flexible conjugation-break spacers (FCBSs) with different lengths on the photovoltaic and mechanical properties of all-polymer solar cells (all-PSCs). It is found that an appropriate FCBS length can optimize the solubility and resulting photovoltaic/mechanical properties of the all-PSCs. The study provides an effective strategy for fine-tuning the structures of polymer acceptors for highly efficient and mechanically robust all-PSCs.
NANO-MICRO LETTERS
(2022)
Article
Energy & Fuels
Shangfei Yao et al.
Summary: In this study, a two-step annealing method was used to achieve 15% efficiency in block copolymer-based organic solar cells. The enhancement of crystallite size, global crystallinity, and reduction of phase length scale and maintenance of phase purity were found to be the driving factors behind the improved device performance.
Article
Engineering, Environmental
Jingnan Wu et al.
Summary: This study demonstrates a facile method to significantly improve the thin film morphology of active-layer materials in organic photovoltaic (OPV) cells, leading to enhanced photovoltaic performance and thermal stability. By fine-tuning the chemical structure of electron-deficient units in the wide bandgap donor polymer, the resulting terpolymers exhibited improved phase separation and favorable exciton dissociation, charge transport, and extraction. The achieved fill factor and power conversion efficiency were outstanding at 77.2% and 17.8%, respectively. The study highlights the importance of molecular structure variations in OPV materials and provides valuable insights for practical applications.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Xunchang Wang et al.
Summary: Side chain engineering is a simple and effective strategy for designing organic photovoltaic materials and improving power conversion efficiencies. This study presents the design and synthesis of a family of fresh hybrid side chains by combining rigid cyclic and flexible alkyl chains. The hybrid side chains impact self-assembling characteristics and facilitate interpenetrating networks in blend films, leading to high-efficiency charge transport and inhibited charge recombination. This work demonstrates the potential of hybrid side chain engineering in organic optoelectronic materials.
Article
Energy & Fuels
Yixuan Luo et al.
Summary: This study demonstrates the fabrication of high-efficiency ST-OSCs by incorporating pentacyclic aromatic lactam acceptor unit (TPTI) in copolymer donors for toluene processing. The insertion of TPTI into the polymer main skeleton lowers the energy level, improves processability, and controls the photon transport window suitable for plant absorption. The study provides a guide for developing high-performance ST-OSCs and demonstrates the potential of ST-OSCs for green manufacturing PV greenhouse applications.
Article
Chemistry, Multidisciplinary
Jin-Woo Lee et al.
Summary: This study achieves highly efficient and mechanically robust polymer solar cells by designing a polymerized small-molecule acceptor with regular flexible spacers. The resulting solar cells show high power conversion efficiency and stretchability, and are fabricated using an environmentally friendly solvent process.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Zhiya Li et al.
Summary: This study investigates the effects of two-dimensional asymmetric side chains in small molecule organic solar cells, and finds that the asymmetry in the side chains can optimize the morphology and electronic properties of the materials, leading to improved charge transport and higher solar cell efficiency.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Review
Chemistry, Multidisciplinary
Jun Yuan et al.
Summary: Organic solar cells (OSCs) have made rapid progress in recent years through the development of novel organic photoactive materials, particularly non-fullerene acceptors (NFAs). However, the understanding of the interplay between molecular structure and optoelectronic properties lags significantly behind. The potential role of energetic disorder in OSCs has received little attention, but recent studies have shown that state-of-the-art NFA-based devices can achieve both low energetic disorder and high power conversion efficiency (PCE).
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Ruijie Ma et al.
Summary: In this study, the morphology of the active layer in all-polymer solar cells was fine-tuned using solvent additive and polymer additive, resulting in an efficiency of 16.04%. Altering the shape of crystallites enhanced charge transport, reduced recombination, and suppressed energy loss, leading to improved device efficiency and stability.
Article
Chemistry, Multidisciplinary
Chaowei Zhao et al.
Summary: The hybrid electrolyte based on a cyclic Ti-oxo cluster and organic ammonium bromide salt demonstrates excellent solubility, aligned work function, good conductivity, and amorphous state, making it suitable for application as a cathode interlayer in organic solar cells with a high power conversion efficiency. This work suggests that hybrid electrolytes could be a new kind of semiconductor with promising applications in organic electronics.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Yihang Zhang et al.
Summary: The introduction of BTPR as a third component in organic solar cells reduces the trap density, leading to significant improvements in PCE and energy loss. This offers new possibilities for achieving higher efficiency solar cells.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Han Yu et al.
Summary: The two regio-regular polymer acceptors synthesized in this study show significant performance difference, with PYF-T-o exhibiting better photon absorption and more ordered inter-chain packing, resulting in higher power conversion efficiency.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Multidisciplinary Sciences
Alexander J. Gillett et al.
Summary: The majority of charge recombination in organic solar cells that use NFAs occurs through non-emissive NFA triplet excitons under open-circuit conditions, reducing the open-circuit voltage. Engineering substantial hybridization between NFA triplet excitons and spin-triplet charge-transfer excitons can suppress this non-radiative recombination pathway, potentially leading to organic solar cells with power conversion efficiencies of 20% or more.
Article
Chemistry, Physical
Xunchang Wang et al.
Summary: This study introduces two C-shaped SM donors with asymmetric central cores, which exhibit matched absorption and energy levels with the acceptor Y6, leading to outstanding power conversion efficiency in ASM-OSCs. The asymmetric core design allows the SM donor to easily penetrate neighboring Y6 molecules, preventing rapid aggregation and large domains of single components in blends. This innovative approach paves the way for highly efficient ASM-OSCs.
Article
Chemistry, Physical
Tao Liu et al.
Summary: The performance of all-polymer organic solar cells has been improved by introducing a small amount of BN-T, resulting in increased crystallinity and enhanced exciton harvesting and charge transport. This enhancement is attributed to the reduced nonradiative energy loss and improved energy and charge transfer between acceptors, making AP-OSCs potentially as efficient as devices based on small molecule acceptors.
Article
Chemistry, Physical
Jingnan Wu et al.
Summary: A novel wide bandgap polymer donor PFBCPZ was developed in this study, which achieved a high power conversion efficiency in organic solar cells (OSCs) when matched with a low bandgap acceptor IT-4F. This demonstrates the potential of low-cost, simple structured DTCPz as a promising building block for high-performance polymer donors in efficient OSCs.
Article
Chemistry, Multidisciplinary
Anping Zeng et al.
Summary: In the field of non-fullerene organic solar cells, a chlorinated donor polymer named D18-Cl is reported in this study, which can achieve high performance with a wide range of polymer molecular weight. Devices based on D18-Cl show higher open-circuit voltage and outstanding short-circuit current density, resulting in higher efficiency compared to those based on D18.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Yun Li et al.
Summary: The ternary strategy has been proven effective for enhancing the power conversion efficiency of organic solar cells. A new design principle for selecting the appropriate third component, such as the non-fullerene acceptor, has been proposed and shown to significantly improve efficiency. This approach offers a promising pathway for further enhancing the performance of ternary OSCs.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Optics
Sha Liu et al.
Article
Chemistry, Physical
Wei Wang et al.
Article
Energy & Fuels
Ahmed H. Balawi et al.
Article
Nanoscience & Nanotechnology
Liwen Hu et al.
ACS APPLIED MATERIALS & INTERFACES
(2020)
Review
Materials Science, Multidisciplinary
Hamna F. Haneef et al.
JOURNAL OF MATERIALS CHEMISTRY C
(2020)
Article
Chemistry, Multidisciplinary
Wenchao Huang et al.
ADVANCED MATERIALS
(2018)
Article
Chemistry, Physical
Shuo Wang et al.
JOURNAL OF PHYSICAL CHEMISTRY C
(2018)
Article
Energy & Fuels
Hang Yin et al.
Article
Chemistry, Physical
Eline M. Hutter et al.
Article
Chemistry, Physical
Derya Baran et al.
Review
Chemistry, Multidisciplinary
Ingo Salzmann et al.
ACCOUNTS OF CHEMICAL RESEARCH
(2016)
Article
Chemistry, Multidisciplinary
Simone Fratini et al.
ADVANCED FUNCTIONAL MATERIALS
(2016)
Article
Multidisciplinary Sciences
Deepak Venkateshvaran et al.
Article
Multidisciplinary Sciences
Valerio D'Innocenzo et al.
NATURE COMMUNICATIONS
(2014)
Article
Multidisciplinary Sciences
Yuchuan Shao et al.
NATURE COMMUNICATIONS
(2014)
Article
Physics, Applied
Samuel D. Stranks et al.
PHYSICAL REVIEW APPLIED
(2014)
Article
Chemistry, Multidisciplinary
Peter J. Diemer et al.
ADVANCED MATERIALS
(2013)
Review
Chemistry, Multidisciplinary
John A. Carr et al.
ENERGY & ENVIRONMENTAL SCIENCE
(2013)
Article
Chemistry, Physical
Anna L. Domanski et al.
JOURNAL OF PHYSICAL CHEMISTRY C
(2013)
Article
Chemistry, Multidisciplinary
Aung Ko Ko Kyaw et al.
Editorial Material
Materials Science, Multidisciplinary
B. Luessem et al.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2013)
Article
Chemistry, Multidisciplinary
Beatrice Fraboni et al.
ADVANCED MATERIALS
(2009)
Article
Chemistry, Physical
Jonathan Rivnay et al.
Article
Optics
Sung Heum Park et al.
