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Article
Chemistry, Multidisciplinary
Ji Wan et al.
Summary: The reasonable application of traditional planar heterojunction (PHJ) structure, combined with sequential spin-coating and orthogonal solvent strategy, can solve the issues of organic solar cells (OSCs) with bulk heterojunction (BHJ) and emerging pseudoplanar heterojunction (PPHJ) structures, achieving high efficiency power conversion.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xiaopeng Xu et al.
Summary: By utilizing a sequential solution processing method, a more suitable IHJ nanostructure for organic solar cells has been achieved, leading to an increased power conversion efficiency. The IHJ structure, compared to the BHJ structure, can efficiently dissociate excitons, reduce charge recombination, and facilitate the transport of free electrons and holes through more straightforward pathways, ultimately enhancing performance.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xunfan Liao et al.
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)
Article
Chemistry, Physical
Zhong Zheng et al.
Summary: A advanced interconnecting layer for tandem organic solar cell is developed in this study. By controlling the O-2 flux during evaporation, efficient electron extraction and low Schottky barrier are obtained, enabling effective charge recombination between two subcells. The tandem cell with the interconnecting layer shows a high efficiency of 20.27%.
Article
Energy & Fuels
Sebastian Grott et al.
Summary: Non-fullerene acceptor (NFA)-based organic solar cells have shown significant progress in recent years. The choice of solvent for spin coating the active layers affects the film morphology and crystallinity. Among the compared chlorinated solvents (CB, chloroform, and dichlorobenzene), CB offers the best combination of small domain sizes, high number of edge-on crystallites, and small distances between neighboring domains. The smooth blend films obtained with CB have correlated roughness with the substrates and no large aggregates, leading to the highest power conversion efficiencies (PCEs).
Article
Chemistry, Multidisciplinary
Congcong Cao et al.
Summary: The quasiplanar heterojunction (Q-PHJ) structure with a bilayer morphology shows improved efficiency and stability in organic solar cells. By using synthesized polymer donors and acceptors, high-performance Q-PHJ all-polymer solar cells (all-PSCs) with reliable stability have been achieved.
ADVANCED FUNCTIONAL 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, 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
Multidisciplinary Sciences
Yunhao Cai et al.
Summary: This study demonstrates the fabrication of efficient thick-film organic solar cells by optimizing the structure of the active layer. The use of one polymer donor and two non-fullerene acceptors in the mixed phase enhances the exciton diffusion length, and the layer by layer approach optimizes the vertical phase separation, resulting in high photovoltaic efficiency.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Danqin Li et al.
Summary: In this study, an organic solar cell was developed with improved power conversion efficiency by doping DMBI-BDZC into the photoactive layer. The doped layer exhibited enhanced carrier mobilities, effective exciton dissociation, longer carrier lifetime, and suppressed charge recombination.
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)
Article
Chemistry, Multidisciplinary
Chengliang He et al.
Summary: This study investigates the advantages of using the sequential casting (SC) method for bulk heterojunction (BHJ)-based organic solar cells (OSCs). It is found that SC processing can achieve better morphology and device performance compared to the widely-used blend casting (BC) method. The observations on phase separation and vertical distribution inspire the proposal of the swelling-intercalation phase-separation model to explain the morphology evolution during SC processing. Moreover, the vertical phase segregation is found to improve device performance through affecting charge transport and collection processes.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
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)
Article
Chemistry, Multidisciplinary
Kuibao Yu et al.
Summary: Optimizing the morphology of the photoactive layer is a simple yet promising approach to improve the power conversion efficiencies of organic solar cells. Different post-processing treatments, including thermal annealing and solvent annealing, were compared to investigate their effects on device performances. The results showed that solvent annealing effectively improved the distribution and aggregation of polymer donors and small molecule acceptors, leading to an optimized active layer film morphology and higher conversion efficiency. In addition, a relatively high light utilization efficiency was achieved by utilizing a transparent electrode, resulting in a remarkable power conversion efficiency and visible-light transmittance.
SCIENCE CHINA-CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Heng Lu et al.
Summary: This study presents a facile strategy to enhance the exciton/charge transport of PM6:Y6-based organic solar cells (OSCs) by using a solid additive, trans-bis(dimesitylboron)stilbene (BBS). The addition of BBS improves the exciton diffusion and charge generation, enhances the crystallization of Y6, and improves the charge-carrier diffusion length. This leads to a higher power conversion efficiency (PCE) of 17.6% in the PM6:Y6:BBS devices compared to the devices without BBS (16.2%).
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Lingling Zhan et al.
Summary: The study demonstrates the potential of using a quaternary strategy to improve the efficiency and practical application of organic photovoltaic (OPV) devices. By optimizing the intermixing-phase size, thick-film and large-area devices are constructed, achieving a high power conversion efficiency (PCE).
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Yanna Sun et al.
Summary: A highly efficient all-small-molecule organic solar cell with a power conversion efficiency of 17.18% is demonstrated through layer-by-layer deposition and solid additive treatment. The controlled morphology allows for ordered molecular stacking and vertical charge transport, resulting in enhanced carrier generation and transport.
Article
Chemistry, Multidisciplinary
Li-Yun Su et al.
Summary: In this study, interfacial engineering using an amphiphilic dendritic block copolymer (DBC) and gold nanoparticles (NPs) was demonstrated to enhance the performance and thermal stability of non-fullerene bulk-heterojunction organic photovoltaic devices. The newly developed DBC@AuNPs interlayer improved device efficiency by enabling better energy-level alignment and enhanced interfacial compatibility at the ZnO/BHJ interface, showing great potential for commercialization with a T(80)lifetime of over 1.79 years at room temperature.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Xuning Zhang et al.
Summary: Utilizing a polymeric donor PBDBT-2F and a non-fullerene acceptor Y6, a strategy was proposed to enhance the photovoltaic performance in planar heterojunction-based organic solar cells by dilute dispersions of the donor in the acceptor-dominant phase. This led to an improved charge transport balance and accelerated photocarrier sweep-out, resulting in a power conversion efficiency of 15.4% in the PHJ-OSCs. Moreover, the PHJ solar cells with donor dispersions exhibited better thermal stability compared to bulk heterojunction devices.
SCIENCE CHINA-CHEMISTRY
(2021)
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
Multidisciplinary Sciences
Kui Jiang et al.
Summary: High-efficiency OSCs with a pseudo-bilayer architecture and optimized ternary system exhibit longer exciton diffusion length and higher power conversion efficiency. The pseudo-bilayer architecture shows excellent potential for future OSC applications.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Lingling Zhan et al.
Summary: This study proposes and demonstrates a method to optimize the morphology of the active layer in organic photovoltaic devices by combining the layer-by-layer (LbL) procedure and the ternary strategy. By adding an asymmetric electron acceptor to the binary donor:acceptor host, a vertical phase distribution is formed, leading to improved efficiency in OPV devices.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jeromy James Rech et al.
Summary: Conjugated polymers have a long history in organic solar cells, and a new synthetic approach towards PTQ10 has significantly reduced cost and achieved high efficiency, demonstrating promising prospects for commercialization.
Article
Chemistry, Physical
Yanan Liu et al.
Summary: This study demonstrated the enhancement of small molecule organic solar cells performance by regulating the morphology of the active layer using a mixed solvent approach, resulting in improved power conversion efficiency. The performance improvement was mainly attributed to the enhancement in bulk heterojunction molecular crystallinity, leading to optimized phase separation, and consequently improving the exciton separation and charge collection efficiency.
ACS APPLIED ENERGY MATERIALS
(2021)
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
Energy & Fuels
Jiyeon Oh et al.
Summary: The development of BHT-based antioxidant additives significantly improves the long-term stability of OSCs in various test systems. The promising results are attributed to the enhanced dielectric and radical scavenging properties induced by BHT in the active-layer matrices.
Article
Nanoscience & Nanotechnology
Ming Hu et al.
Summary: The layer-by-layer solution processing method using PDI acceptors has been proven to enhance the performance of organic solar cells by improving charge transport and carrier mobility, leading to higher efficiency and favorable film morphology.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Ling Hong et al.
Summary: Establishing an ideal architecture with selective carrier transport and suppressed recombination is crucial for improving photovoltaic efficiency in organic solar cells (OSCs). By tailoring a hybrid planar/bulk structure, highly efficient OSCs with reduced energy losses were fabricated. The study highlights the potential of precisely regulating the structure of donor:acceptor heterojunction to further enhance the efficiencies of OSCs.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Physical
Xia Xiong et al.
Summary: This study focused on optimizing charge extraction efficiency and charge recombination through interface engineering, resulting in increased efficiencies of two types of organic solar cells.
ACS ENERGY LETTERS
(2021)
Article
Chemistry, Physical
Xiaosha Wang et al.
Summary: The performance of polymer donors Qx-8F, Qx-10F, and Qx-12F improves with higher fluorine content, leading to enhanced open circuit voltage, short circuit current density, and fill factor. The device based on Qx-12F with the most fluorine atoms and non-fullerene acceptor Y6 achieves the highest power conversion efficiency, while further improvement is demonstrated with the optimized ternary device based on the Qx-12F:PM6:Y6 blend.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Multidisciplinary
Jie Lv et al.
Summary: By introducing an additive-induced miscibility and morphology control strategy, the performance of the PM6:Y6 organic solar cell has been improved to 17.5%, optimizing the photon response of the Y6 phase and enhancing charge extraction and collection efficiency.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Review
Chemistry, Physical
Yilin Chang et al.
Summary: With the continuous improvements in laboratory-scale organic solar cell performances, the development of efficient OSCs with thick active layers compatible for large-area printing processes is crucial for commercialization. Despite achieving high power conversion efficiencies using non-fullerene acceptors in thin-film OSCs, thick-film OSCs still lag behind due to increased charge recombination probability. Developing highly efficient photoactive materials for thick-film OSCs to exhibit optimal charge generation and transport morphology is essential for transitioning to industrial high-throughput manufacturing.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
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Andrej Classen et al.
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ACS ENERGY LETTERS
(2020)
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Rui Sun et al.
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Can Zhu et al.
ENERGY & ENVIRONMENTAL SCIENCE
(2020)
Editorial Material
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Review
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(2019)
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ADVANCED ENERGY MATERIALS
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(2015)
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(2005)