Nature Communications
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2024
·Vol. 15
·期 1
·1-8
·
IF 14.7
Li Mengqi,Li Rui,Wu Longjia,Lin Xiongfeng,Xia Xueqing,Ao Zitong,Sun Xiaojuan,Chen Xingtong,Chen Song
Top emission can enhance luminance, color purity, and panel-manufacturing compatibility for emissive displays. Still, top-emitting quantum-dot light-emitting diodes (QLEDs) suffer from poor stability, low light outcoupling, and non-negligible viewing-angle dependence because, for QLEDs with non-red emission, the electrically optimum device structure is incompatible with single-mode optical microcavity. Here, we demonstrate that by improving the way of determining reflection penetration depths and creating refractive-index-lowering processes, the issues faced by green QLEDs can be overcome. This leads to advanced device performance, including a luminance exceeding 1.6 million nits, a current efficiency of 204.2 cd A −1 , and a T 95 operational lifetime of 15,600 hours at 1000 nits. Meanwhile, our design does not compromise light outcoupling as it offers an external quantum efficiency of 29.2% without implementing light extraction methods. Lastly, an angular color shift of Δ u’v’ = 0.0052 from 0° to 60° is achieved by narrowing the emission linewidth of quantum dots.
研究领域:
材料科学
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光学工程
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Materials
·
2025
·Vol. 18
·期 12
·2675
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IF 3.2
Rui Hu,Di Xie,Yi Jin,Xiaojie Ren,Xiang Huang,Yitong Ji,Xiaotong Liu,Xueyuan Yang,Wenchao Huang
Conventional fabrication of high-efficiency organic solar cells (OSCs) predominantly relies on vacuum-evaporated metal top electrodes such as Ag and Al, which hinder large-scale industrial production. Gallium-based liquid metals (GaLMs), particularly the eutectic gallium–indium alloy (EGaIn), represent promising candidates to conventional vacuum-evaporated metal top electrodes due to their excellent printability and high electrical conductivity. In this study, we fabricated vacuum-free OSCs based on GaLM electrodes (Ga, EGaIn, and Galinstan) and analyzed the device performances. Rigid devices with EGaIn electrodes achieved a champion power conversion efficiency (PCE) of 15.6%. Remarkably, all-solution-processed ultrathin flexible devices employing silver nanowire (AgNW) bottom electrodes in combination with EGaIn top electrodes achieved a PCE of 13.8% while maintaining 83.4% of their initial performance after 100 compression–tension cycles (at 30% strain). This work highlights the potential of GaLMs as cost-effective, scalable, and high-performance top electrodes for next-generation flexible photovoltaic devices, paving the way for their industrial adoption.
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ACS Applied Optical Materials
·
2025
·
IF 3.8
Xi Ran,Hang Xia,Jing Liu,Mohan Yuan,Xudong Hu,Ya Wang,Xinzheng Lan
Lead sulfide (PbS) colloidal quantum dot (CQD) photodetectors are promising devices for low-cost, high-performance, and large-area infrared imaging. For integration with readout integrated circuits (ROICs), top illumination is urgently required to ensure simultaneous light absorption and signal acquisition. However, the traditional best-performing p-on-n PbS CQD photodetectors rely on opaque top metal contacts, thus limiting the development of top-illuminated imagers. Herein, we addressed this issue by introducing a bifunctional ZnTe layer. The presence of the ZnTe layer─while allowing efficient hole collection─serves as a protective layer for the CQD layer during subsequent transparent electrode deposition. The resultant PbS CQD photodetectors based on the ZnTe layer show a specific detectivity of 2.09 × 1012 Jones at ≈1300 nm, representing approximately a 5-fold improvement over the control device (4.30 × 1011 Jones). This performance is comparable to that of the best PbS CQD photodetectors reported at similar wavelengths. The advantages of this architecture are further demonstrated by building a PbS CQD imager with a pixel array of 256 × 256, verifying the compatibility of photodetectors with ROICs.
研究领域:
光电子学
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纳米技术
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红外成像
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半导体器件
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材料科学
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Nanoscale
·
2021
·Vol. 13
·期 48
·20471-20480
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IF 7.79
Qiang Yu,Shun Wang,Yan Zhang,Zhuo Dong,Haiqin Deng,Kun Guo,Tao Wang,Xinyao Shi,Fangqi Liu,Tianhao Xian,Sicong Zhu,Jian Wu,Ziyang Zhang,Kai Zhang,Li Zhan
Tantalum disulfide (TaS2), an emerging group VB transition metal dichalcogenide, with unique layered structure, rich phase diagrams, metallic behavior, higher carrier concentration and mobility is emerging as a prototype for revealing basic physical phenomena and developing practical applications. However, its photonics properties and even engineering-related processes are still rare. Here, the top-down experiment demonstration, including synthesis, thickness optimization and nonlinear optical application, has been reported. In addition, the ultrafast (∼373 fs) erbium-doped fiber pulse with a small time-bandwidth product (∼0.34) and long-term stability (∼25 days) was realized using the nonlinear absorption properties of the high-quality 2H-TaS2 nanosheet. These results suggest an experimental route for further ultrafast photonics exploration based on metallic transition metal dichalcogenides.
研究领域:
光子学
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纳米材料
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非线性光学
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激光物理
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材料科学
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PROGRESS IN ORGANIC COATINGS
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2019
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IF 3.42
Guanqing Sun,Huiwen Ge,Jing Luo,Ren Liu
It is highly desirable that surface coatings such as kitchen furniture coatings, hospital wall, furniture coatings and many other coatings used in public areas possess antibacterial properties. Although many antibacterial coatings have already been developed and are now commercially available for some time, effective antibacterial properties often require the addition of antibacterial agents in large amount which deteriorate the mechanical properties of the coatings and hence limit their wide-spread uses. Herein we show the fabrication of a robust and wear-resistant polyurethane-based coatings via addition of fluoro-containing quaternary ammonium compounds (QAC F ) modified silica nanoparticles. The nanoparticles are obtained from a classical Stöber process with a thin layer of thiol groups on the particle surface and the QAC F is then further linked to particle surface through double bond and thiol group reaction. QAC F and its modified silica nanoparticles both show high levels of antibacterial properties toward Gram positive and Gram negative bacteria. Addition of the nanoparticles in as less as 10 wt% in the formulation recipe would be enough to produce an antibacterial coating with excellent anti-wear resistance due to the self-migration of the modified silica nanoparticles to the surface layer of the coating. We have used XPS and confocal microscopy to show the particle migration to the top of the coatings enables us to clarify the mechanism. Compared to coatings with added pure antibacterial reagents, our coating shows enhanced anti-wear property at relatively low particle additions.
研究领域:
材料科学
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生物学
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Materials Chemistry Frontiers
·
2022
·Vol. 6
·期 9
·1194-1208
·
IF 8.683
Junjie Hao,Junzi Li,Meijuan Chen,Xijian Duan,Bing Xu,Yiwen Li,Tingchao He,Xiao Wei Sun,Marie-Hélène Delville,Jiaji Cheng
Induced chirality in colloidal semiconductor nanoparticles has received much attention in the past few years as an extremely sensitive spectroscopic tool and because of the promising applications of chiral quantum dots (QDs) in sensing, quantum optics, and spintronics. Yet, the origin of chiroptical effects induced in these nanoparticles is not fully understood, partly because almost all theoretical and experimental studies performed so far are based on the comparison of the g-factor of bulk solutions, which may not truly reflect the variation of the chiral signal in a single nanoparticle. This is because, at a given absorbance value, any change in the molar absorption coefficient at the single nanoparticle level does seriously affect the estimation of the real number of nanoparticles and comparison in-between solutions. Here, we show that using a top-down chemical etching process of colloidal two-component CdSe/CdS dot-in-rods (DRs) nanoparticles can facilitate precise control of nanocrystal solutions with identical concentrations, which cannot be achieved by bottom-up hot injection technology alone. This approach is highly required for studying ligand-induced chiral conduction mechanisms because it effectively eliminates the influence of both the concentrations of nanoparticles and ligands at the same time, instead of relying only on the g-factor related to absorbance. The results showed, thanks to the top-down selective domain etching system, that the shell layer had a negative correlation with the chirality of the first exciton peak (CdSe core contribution), but a positive correlation with the chirality of the CdS shell absorption. At the same time, the core integrity is crucial for DRs to maintain high circular dichroism (CD) and circularly polarized luminescence (CPL) signals. This work, on the one hand, advances the understanding of the fundamental origin of chiral conduction effects induced in semiconductor nanoparticles, and, on the other hand, opens a path to applications using chiral materials.
研究领域:
材料科学
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化学
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光学
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ACS Nano
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2019
·
IF 13.903
Minqi Sheng,Binbin Jiang,Bin Wu,Fan Liao,Xing Fan,Haiping Lin,Youyong Li,Yeshayahu Lifshitz,Shuit-Tong Lee,Mingwang Shao
Electrolysis of water to generate hydrogen is an important issue for the industrial production of green and sustainable energy. The best electrocatalyst currently available for the hydrogen evolution reaction (HER) is platinum. We herein show that iridium can be manipulated to achieve a record high HER activity surpassing platinum in every aspect: a lower overpotential at any given current density, a higher current density, and mass activity for all bias potentials applied and a catalyst cost reduction of 50% for the same hydrogen generation rate. The superior HER activity was achieved by a binary Ir/Si nanowire catalyst design in which (as density functional theory calculations show) two distinct strategies act in synergy: (i) decreasing the size of the iridium nanoparticles to ∼2.2 nm and (ii) dividing the H2-generation process to three steps occurring on two different catalysts: H adsorption on iridium, H diffusion to silicon, and H2 desorption from silicon.
研究领域:
材料科学
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能源化学
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催化化学
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AAPS PHARMSCITECH
·
2022
·Vol. 24
·期 1
·1-13
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IF 4.026
Wang Guoliang,Li Yanchao,Qin Zhiguo,Liu Tao
Nanotechnology and coamorphous are both advanced technologies that can effectively improve the solubility of drugs. This study has been the first attempt to combine these two approaches to construct the coamorphous nanoparticles to improve the dissolution and investigated the effect of physical properties of coamorphous solid on the nanosizing process. Two types of coamorphous solid, i.e., curcumin-artemisinin and quercetin-lysine, were selected as models. Coamorphous curcumin-artemisinin could highly contribute to the size reduction during milling compared to the crystalline form, which might attribute to the change of crystallinity. Nanosized coamorphous curcumin-artemisinin showed higher dissolution than nanocrystals and single coamorphous sample. However, quercetin-lysine coamorphous nanoparticles did not reflect significant dissolution improvement compared with the microsized sample. The difference of initial dissolutions for both could be the main reason. The directly mixing and drying method was confirmed to be an effective and simple approach to maintain the dissolution of nanosized coamorphous sample.
研究领域:
药剂学
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纳米医学
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Nano-Micro Letters
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2025
·Vol. 17
·期 1
·1-20
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IF 36.3
Li Xin,Ying Zhiqin,Li Shuo,Chen Lei,Zhang Meili,Liu Linhui,Guo Xuchao,Wu Jun,Sun Yihan,Xiao Chuanxiao,Zeng Yuheng,Wu Jian,Yang Xi,Ye Jichun
Despite significant advancements in the power conversion efficiency (PCE) of perovskite/silicon tandem solar cells, improving carrier management in top cells remains challenging due to the defective dual interfaces of wide-bandgap perovskite, particularly on textured silicon surfaces. Herein, a series of halide ions (Cl − , Br − , I − ) substituted piperazinium salts are designed and synthesized as post-treatment modifiers for perovskite surfaces. Notably, piperazinium chloride induces an asymmetric bidirectional ions distribution from the top to the bottom surface, with large piperazinium cations concentrating at the perovskite surface and small chloride anions migrating downward to accumulate at the buried interface. This results in effective dual-interface defect passivation and energy band modulation, enabling wide-bandgap (1.68 eV) perovskite solar cells to achieve a PCE of 22.3% and a record product of open-circuit voltage × fill factor (84.4% relative to the Shockley–Queisser limit). Furthermore, the device retains 91.3% of its initial efficiency after 1200 h of maximum power point tracking without encapsulation. When integrated with double-textured silicon heterojunction solar cells, a remarkable PCE of 31.5% is achieved for a 1.04 cm 2 monolithic perovskite/silicon tandem solar cell, exhibiting excellent long-term operational stability ( T 80 = 755 h) without encapsulation in ambient air. This work provides a convenient strategy on dual-interface engineering for making high-efficiency and stable perovskite platforms.
研究领域:
材料科学
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能源技术
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光伏器件
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ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Zijie Zhang,Yiwen Xian,Dan Zhou,Yang Liu,Chao Liu,William Weijia Lu,Hongmei Liu,Decheng Wu
Conventional hydrogels often suffer from weak and fragile natures, limiting their uses in mechanically demanding areas. By contrast, spider silk hold impressive strength and toughness owing to its hierarchical structure. Inspired by spider dragline fiber, the boundaries of conventional hydrogels are broken by introducing hierarchical structures in chitosan fibrous hydrogels (FH CS ) via a top-down multidimensional engineering strategy. Each level of hierarchical structure is introduced in different approaches: macroscopic fibers are fabricated via electrospinning; microscopic fibrillar structures are introduced based on “sea-islands” phase separation structure; chitosan anhydrous crystallites at the molecular level are induced by hydrogen bonding reconstruction. Through this strategy, the resulting hierarchical FH CS exhibits extreme mechanical properties (fracture strength: 47.0 ± 2.4 MPa; Young's modulus: 5.6 ± 2.4 MPa; fracture toughness: 12.3 ± 1.5 MJ m −3 ), simulating the mechanical properties of cartilage tissue. FH CS also shows good biocompatibility, biodegradability, and modulation on cell spreading and phenotypes via mechanotransduction pathway. Overall, FH CS emerges as a promising material in the mechanically demanding areas of biomedical fields. Besides, the top-down multidimensional engineering strategy provides fresh perspectives for creating hierarchical materials.
研究领域:
材料科学
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生物材料
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组织工程
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生物医学工程
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Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·417
·
IF 38.5
Lu Chunching,Zhang Guangxiang,Niu Yuxiang,Zhu Yupeng,Li Siyuan,Huo Hua,Ma Yulin,Zuo Pengjian,Yin Geping,Gao Yunzhi,Wang Liguang,Fu Chuankai,Chen Wei
Artificial solid electrolyte interphase offers a promising route to improve the lifespan and safety of quasi-solid-state sodium-metal batteries (QSMBs), yet its limited ion conductivity and the low liquidity of the polymer electrolyte often result in unstable Na plating/stripping kinetics and poor interfacial durability. Herein, we propose a surface-induced “top” Na deposition mechanism facilitated by an ultra-sodiophilic ionic/electronic mixed conductor interphase exhibiting strong Na + adsorption affinity, which ensures fast and dendrite-free Na anode operation. The embedded Na 3 Sb alloy phase, featuring high electronic conductivity and strong Na + adsorption energy, significantly accelerates interfacial ion diffusion and nucleation kinetics, forming a smooth and compact Na deposition layer that facilitates stable solid electrolyte interphase formation and preserves interfacial integrity. Consequently, Na||Na symmetric cells employing a 1, 3-dioxolane-based gel polymer electrolyte deliver an ultra-long-cycling lifespan of 1000 h at 0.5 mA cm −2 with a low overpotential of 40 mV. Moreover, QSMBs incorporating the modified Na anode and Na 3 V 2 (PO 4 ) 3 cathode demonstrate outstanding cycling stability (74.1% capacity retention after 9000 cycles at 2C) and superior rate capability (91.7 mAh g −1 at 5C). The work provides mechanistic insights and practical strategies for regulating Na deposition, paving the way toward high-performance QSMBs.
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Advanced Science
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2026
·
IF 14.1
Xin Li,Miao Xu,Heran Li,Huan Jiang,Xin Wang,Lianjun Ma,Ying-Wei Yang
Oral treatment of inflammatory bowel disease (IBD) faces significant challenges of poor targeting, low bioavailability, and systemic toxicity, necessitating intelligent stimuli-responsive delivery systems. Here, we design and synthesize a pH/hypoxia dual-responsive pendant azobenzene-functionalized MOF (Azo-MOF). The uniformly distributed azobenzene pendants serve as intrinsic gating sites, forming “snap-top” encapsulation with β-cyclodextrin through host-guest interactions that prevent premature 6-mercaptopurine leakage while enabling rapid stimuli-triggered release, creating a postmodification-free supramolecular gated delivery nanosystem (CAMM). CAMM exhibits hypoxia-triggered burst release and alkaline-sustained release, with <5.0% drug leakage during gastrointestinal transit and >90.0% cumulative release at inflammatory sites. Notably, the Azo-MOF carrier scavenges reactive oxygen species through synergy between its conjugated π -system and metal coordination environment, providing antioxidant protection alongside drug delivery. In dextran sulfate sodium-induced colitis models, CAMM outperformed free drug, achieving near-complete weight recovery, downregulating proinflammatory cytokines, restoring intestinal barrier integrity, and rebalancing gut microbiota by enriching Lactobacillus and Bifidobacterium while suppressing opportunistic pathogens. This study integrates targeted delivery, antioxidant therapy, and microbiota modulation, offering an effective strategy for precision IBD treatment.
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