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Article
Chemistry, Multidisciplinary
Yuntong Guo et al.
Summary: By selecting different alkyl chains, the performance of organic solar cells can be modulated. The alkyl chain of 2-butyloctyl effectively inhibits recombination, improves molecular packing, enhances carrier mobility, and enhances exciton dissociation. The organic solar cell with G6-BO as the acceptor shows the best electrical and morphological characteristics, achieving a higher power conversion efficiency of 17.06%.
SCIENCE CHINA-CHEMISTRY
(2023)
Article
Chemistry, Physical
Mengyun Jiang et al.
Summary: In this study, a new acceptor L8-BO was combined with the B1:BO-4Cl system to construct efficient ternary all-small-molecule organic solar cells (ASM-OSCs). Theoretical, morphological, and crystallographic studies showed that L8-BO and BO-4Cl had good compatibility, leading to the formation of an alloy-like state in the ternary blend. The synergy between the two acceptors promoted favorable phase separation and molecular stacking, enhancing charge splitting and extraction and resulting in improved short-circuit current density and fill factor. Furthermore, the alloy-like state of the acceptors and the higher energy level of L8-BO helped reduce voltage loss in the ternary ASM-OSCs compared to binary devices. The optimal ternary ASM-OSCs with 20 wt% L8-BO achieved a top-level efficiency of 17.10%.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Cen Zhang et al.
Summary: This study demonstrates that the addition of ZCCF3 as a third component can stabilize the classical Y6-based binary organic solar cells. ZCCF3 has a higher glass transition temperature (T-g) than Y6 and high miscibility with Y6, resulting in a diffusion-limited Y6:ZCCF3 alloy when blended with the polymer donor. As a result, the optimal PM6:Y6:ZCCF3 devices achieve a champion power conversion efficiency of 18.54% and can retain 80% initial efficiency for up to 360 hours. This study highlights the importance of the high T-g and hyper-miscible accepter alloys of the third component in achieving highly efficient and stable organic solar cells.
ADVANCED FUNCTIONAL 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
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
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
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
Fei Meng et al.
Summary: The design and synthesis of two asymmetric silicon-oxygen bridged guest acceptors with distinct properties greatly improved the photovoltaic performance of ternary organic solar cells. Ternary devices incorporating these acceptors achieved high power conversion efficiencies of 18.22% and 18.77%. The fusion of five-membered carbon linkages and six-membered silicon-oxygen connection provided precise control of material properties, attracting significant attention for the development of more efficient OSCs.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Xinxin Yuan et al.
Summary: The study demonstrates that using new ternary photoactive layers can improve both the power conversion efficiency and color rendering index of semitransparent organic photovoltaics, leading to excellent neutral color perception. In addition, multifunctional semitransparent organic photovoltaics can be achieved by optimizing the content of PC71BM in the acceptors and using a photonic reflector, resulting in high device performance and good color neutrality.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Hang Wang et al.
Summary: Three regioregular benzodithiophene-based donor-donor (D-D)-type polymers were designed, synthesized, and used in organic solar cells (OSCs), with one of them, PBDTT1Cl, demonstrating superior performance in terms of power conversion efficiency, charge mobility, and nonradiative energy loss.
ADVANCED MATERIALS
(2022)
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
Pengqing Bi et al.
Summary: This study synthesized three wide-bandgap nonfullerene acceptors with nonfused conjugated structures, among which GS-ISO demonstrated superior performance in terms of optical properties. The OPV cell based on GS-ISO showed excellent power conversion efficiency and stability, making it a promising candidate for various photovoltaic applications.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Guoping Li et al.
Summary: This study compares two types of end group fluorination patterns on Y6-based A-DAD-A cores, resulting in highly efficient NFAs: direct skeletal fluorination (BTF) and indirect trifluoromethyl fluorination (BTFM). The performance trends of BTF vs. BTFM OSCs can be correlated with diffraction-derived differences in molecular packing. DFT reveals low internal reorganization energies and high electronic coupling between NFA dimers, providing extended 3D charge transport networks in thin film crystalline domains.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
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
Nanoscience & Nanotechnology
Xiang Gao et al.
Summary: In this study, two novel third components, MAZ-1 and MAZ-2, were designed and synthesized, and their application in binary organic solar cells improved the photovoltaic performance. Optimal phase separation, suppression of recombination, and reduction of energy loss were achieved, resulting in enhanced efficiency of TOSCs.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Hai-Rui Bai et al.
Summary: By incorporating an asymmetric acceptor into binary blends, ternary organic solar cells (OSCs) were prepared. The good compatibility of two isogenous acceptors with similar chemical skeletons optimized the morphology and improved the photon absorption ability and energy level matching. The optimized ternary OSCs achieved high conversion efficiency and champion efficiency.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Jinfeng Ge et al.
Summary: Asymmetric substitution of end-groups is applied in molecular donors for the first time, resulting in donors with increased dipole moments and enhanced aggregation propensity. Among the asymmetric donors studied, SM-CA-Reh shows the highest power conversion efficiency (PCE) and fill factor (FF) when using N3 as the acceptor. Characterization results suggest that the packing morphology of blend films is mainly influenced by π-π interaction rather than dipole effect or crystallinity.
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
Jules Bertrandie et al.
Summary: The study investigates the energy levels of 33 organic semiconductors using multiple techniques and explores their impact on the performance of solar cells. The findings reveal that high-performing systems have significant ionization energy offsets, and vanishing ionization energy offsets are detrimental to device performance.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Jingwen Wang et al.
Summary: The development of polymerized small-molecule acceptors has improved the power conversion efficiencies (PCEs) of all-polymer organic photovoltaic (OPV) cells. However, suitable polymer donors for all-polymer OPV cells are still lacking. In this study, a new polymer donor named PQM-Cl is designed and its photovoltaic performance is explored.
ADVANCED MATERIALS
(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
Jinhua Gao et al.
Summary: This study utilized a ternary donor alloy strategy to precisely tune the energy of charge transfer (CT) state in organic solar cells (OSCs), leading to improved efficiency. By adjusting the energy of CT state, energy loss was reduced, hybridization between localized excitation state and CT state was promoted, and optimal morphology was achieved, resulting in a significantly enhanced efficiency.
Article
Chemistry, Physical
Zhenyu Chen et al.
Summary: This study synthesized four efficient non-fullerene acceptors by modifying the quinoxaline core, which showed improved molecular solubility and elevated lowest unoccupied molecular orbital levels. The introduction of a thiophene ring and a fluorine atom further optimized the blend morphology and enhanced device performance.
ACS ENERGY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Ji Wan et al.
Summary: This study presents the design of an asymmetric acceptor BTP-F3Cl and its application in organic solar cell systems. By introducing BTP-F3Cl, the system achieves higher device efficiency and superior processing performance. Compared to the base system, the ternary system exhibits larger exciton diffusion length, higher photoluminescence quantum yield, superior electron mobility, and suppressed non-radiative recombination.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Physical
Xin Yan et al.
Summary: A ternary strategy of introducing a third component, MOIT-M, into a binary PM6:BTP-eC9 blend has been shown to enhance the efficiency and stability of organic solar cells (OSCs). MOIT-M exhibits complementary absorption spectra and aligned energy levels with the binary blend, promoting light harvesting, exciton dissociation, and charge transport. Furthermore, MOIT-M improves miscibility with BTP-eC9, leading to optimized morphology and reduced non-radiative energy losses. The inclusion of MOIT-M results in a significantly increased PCE of 18.5% and improved storage stability compared to the control binary device with a PCE of 17.4%.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Multidisciplinary
Xiaolei Kong et al.
Summary: The side chain configuration of organic small molecule acceptors (SMAs) has been found to significantly impact their intermolecular interaction and aggregation morphology. In this study, two isomeric A-DA 'D-A type SMAs with thienyl outer side chains were designed and synthesized to investigate the effects of thienyl conjugated outer side chains and the alkyl substitution position on SMA properties. It was found that the beta-substituted m-TEH SMA exhibited stronger intermolecular interaction and higher electron mobility compared to the alpha-substituted o-TEH SMA. Furthermore, the m-TEH blend film with the PBQ6 polymer donor showed more suitable phase separation, enhanced molecular packing, and improved hole and electron mobilities compared to the o-TEH blend film. Organic solar cells based on PBQ6:m-TEH achieved a significantly higher power conversion efficiency (PCE) of 18.51% compared to PBQ6:o-TEH based solar cells. This study demonstrates that m-TEH with 2-ethylhexyl beta-substituted thienyl outer side chains is an excellent high-performance SMA for organic solar cells.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Feng Liu et al.
Summary: A high-performance ternary solar cell utilizing a large-bandgap polymer donor and two structurally similar small-bandgap alloy acceptors is reported, achieving a power conversion efficiency of over 18%. By delicately regulating the energy levels of the alloy acceptor through varying the ratio of the two acceptors, more efficient hole transfer and exciton separation are achieved, contributing to reduced energy loss and better overall performance compared to single acceptor systems. Such a two-in-one alloy strategy shows promise in boosting the photovoltaic performance of devices.
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
Engineering, Environmental
Hongtao Wang et al.
Summary: This study reports high-performance large-area and thick-film ternary organic solar cells by incorporating the high electron mobility IDIC into the PM6:IM-4F host blend. The optimized -100 nm-thick ternary OSCs with 10 wt% IDIC exhibit high power conversion efficiency and excellent tolerance to active layer thickness. These ternary OSCs have great potential for large-scale fabrication of highly-efficient thick-film OSCs for practical applications.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Multidisciplinary Sciences
Shuixing Li et al.
Summary: The study conducted on four non-fullerene acceptors reveals how extended conjugation, asymmetric terminals, and alkyl chain length can affect device performance. Understanding correlations between molecular structures and macroscopic properties is critical in realizing highly efficient organic photovoltaics.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Pengqing Bi et al.
Summary: Introducing HDO-4Cl increased the exciton diffusion length in the acceptor phase, reducing non-radiative charge recombination and improving photon utilization efficiency in PBDB-TF: eC9-based OPV cells. This led to achieving a high-efficiency OPV cell with outstanding power conversion efficiency, demonstrating the effectiveness of regulating exciton behaviors in reducing energy loss.
Article
Chemistry, Physical
Zhenyu Chen et al.
Summary: Incorporating highly ordered crystalline small molecules into host binary systems has been shown to significantly improve the photovoltaic performance of organic solar cells. By designing and synthesizing small molecular donors with similar chemical structures, it was found that the silicon-containing G19 exhibited a higher degree of order in the host system, resulting in improved power conversion efficiency.
Article
Chemistry, Multidisciplinary
Tongle Xu et al.
Summary: The study investigates the effect of selenophene substitution on the morphology and photovoltaic performance of liquid crystalline donors, and finds that the selenide donor exhibits higher intramolecular interaction and a more favored morphology, leading to outstanding power conversion efficiency up to 15.8%. This highlights the superiority of selenophene in constructing efficient small molecule liquid crystalline donors.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Jinzhao Qin et al.
Summary: The study found that the ternary bulk heterojunction layer with optimized composition can exhibit faster charge transfer processes, suppress geminate and non-geminate charge recombination, lower energetic disorder, and higher and more symmetric carrier mobilities. The nanoscale bicontinuous interpenetrating network with a hierarchical branched structure can be fully evolved in the BHJ layer with the optimal ternary composition.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Gaoda Chai et al.
Summary: Side-chain engineering plays a crucial role in optimizing Y-series nonfullerene acceptors (NFAs) for organic solar cells (OSCs). By investigating the orientation of side chains, it was found that the meta-positioned hexylphenyl group (m-BTP-PhC6) showed the most beneficial effects on optical absorption, intermolecular packing, and phase separation of NFAs, resulting in a device efficiency of 17.7% when paired with a donor polymer PTQ10. This study demonstrates that regulating side-chain orientations of Y-series NFAs is a promising strategy for achieving favorable morphology, high charge mobility, and improved solar cell performances.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Zichun Zhou et al.
ADVANCED MATERIALS
(2020)
Article
Chemistry, Physical
Qing Ma et al.
Article
Chemistry, Multidisciplinary
Can Zhu et al.
ENERGY & ENVIRONMENTAL SCIENCE
(2020)
Article
Chemistry, Physical
Kui Jiang et al.
