Physica Status Solidi-Rapid Research Letters
·
2022
·Vol. 17
·期 1
·2200295
·
IF 3.277
Pengpeng Cheng,Zehan Liu,Ruyan Kang,Jian Zhou,Jia Zhao,Zhiyuan Zuo
Perovskite light-emitting diodes (PeLEDs) are generally fabricated in a sandwiched device structure that contains a perovskite emissive layer between the electron transport layer (ETL) and the hole transport layer (HTL). However, protective atmosphere environments are avoidless during the fabrication processes of PeLEDs. Taking the large-scale industrial production into consideration, all-solution method-processed ETL-free PeLEDs under ambient conditions are still highly demanding. This work successfully demonstrates the optimization of blocking passivation layer ETL-free PeLEDs by the all-solution method for manufacturing in ambient conditions. The obtained PeLEDs have a luminance of more than 8200 cd m −2 , which is more than 40 times higher compared with the control device. The optimization mechanism of passivation and synergism effects is proposed. These advances can provide an opportunity to fabricate high-performance perovskite-based photovoltaic devices under ambient conditions.
研究领域:
材料科学
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光电子学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of the American Chemical Society
·
2023
·
IF 15
Qianqian Wang,Hao Cui,Xiaolin Wang,Ziyu Hu,Peipei Tao,Mingyang Li,Jianlong Wang,Yaping Tang,Hong Xu,Xiangming He
Lithographic patterning, which utilizes the solubility switch of photoresists to convert optical signals into nanostructures on the substrate, is the primary top-down approach for nanoscale fabrication. However, the low light/electron-energy conversion efficiency severely limits the throughput of lithography. Thiol–ene reaction, as a photoinitiated radical addition reaction, is widely known as click reaction in the field of chemistry due to its extremely high efficiency. Here, we introduce a click lithography strategy utilizing the rapid thiol–ene click reaction to realize ultraefficient nanofabrication. This novel approach facilitated by the implementation of ultrahigh-functionality material designs enables high-contrast patterning of metal-containing nanoclusters under an extremely low deep-ultraviolet exposure dose, e.g., 7.5 mJ cm–2, which is 10–20 times lower than the dose used in the photoacid generator-based photoresist system. Meanwhile, 45 nm dense patterns were also achieved at a low dose using electron beam lithography, revealing the great potential of this approach in high-resolution patterning. Our results demonstrated the high-sensitivity and high-resolution features of click lithography, providing inspiration for future lithography design.
研究领域:
材料科学
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纳米技术
·
化学
·
光子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2023
·
IF 13.3
Hong Wang,Junbin Gao,Cong Xu,Yuejun Jiang,Meihuan Liu,Hanfeng Qin,Yicheng Ye,Li Zhang,Wanxian Luo,Bin Chen,Lingli Du,Fei Peng,Yingjia Li,Yingfeng Tu
Nanotechnology-based strategy has recently drawn extensive attention for the therapy of malignant tumors due to its distinct strengths in cancer diagnosis and treatment. However, the limited intratumoral permeability of nanoparticles is a major hurdle to achieving the desired effect of cancer treatment. Due to their superior cargo towing and reliable penetrating property, micro-/nanomotors (MNMs) are considered as one of the most potential candidates for the coming generation of drug delivery platforms. Here, near-infrared (NIR)-actuated biomimetic nanomotors (4T1-JPGSs-IND) are fabricated successfully and we demonstrate that 4T1-JPGSs-IND selectively accumulate in homologous tumor regions due to the effective homing ability. Upon laser irradiation, hyperthermia generated by 4T1-JPGSs-IND leads to self-thermophoretic motion and photothermal therapy (PTT) to ablate tumors with a deep depth, thereby improving the photothermal therapeutic effect for cancer management. The developed nanomotor system with multifunctionalities exhibits promising potential in biomedical applications to fight against various diseases.
研究领域:
纳米技术
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癌症治疗
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生物医学工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2023
·
IF 4.5
Guizhen Yu,Qingyu Niu,Xiao Liu,Liang He,Jinxie Yu,Hang Han,Wenjing Wang,Ying Zhang,Zhiqiang Li,Qingqing Xiong
In this work, hybrid anisotropic hydrogel is developed through dispersing carbon quantum dots , ultrahigh magnetic nanoparticle-coated alumina (Fe/Al 2 O 3 ) platelets in acrylamide aqueous solution in the assistance of magnetic field, then fix the oriented structure via gelation . The aligned Fe/Al 2 O 3 platelets result in formation of anisotropic structure, thus endows the hydrogels mechanical anisotropy and fluorescent anisotropy. White-light emission is obtained via varying the weight ratio of yellow-emitting ZnO QDs and blue-emitting N,S-CDs. This strategy not only enriches the mechanical/fluorescent dual anisotropic soft materials, but also have great potential application in the fields of organic light-emitting diodes, nonlinear optics and field effect transistors .
研究领域:
材料科学
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光电技术
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纳米技术
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软物质物理
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-11
·
IF 16.6
Wang Dan,Chen Zhaomin,Li Mingtong,Hou Zhen,Zhan Changsong,Zheng Qijun,Wang Dalei,Wang Xin,Cheng Mengjiao,Hu Wenqi,Dong Bin,Shi Feng,Sitti Metin
Light-driven actuators have great potential in different types of applications. However, it is still challenging to apply them in flying devices owing to their slow response, small deflection and force output and low frequency response. Herein, inspired by the structure of vine maple seeds, we report a helicopter-like rotary flying photoactuator (in response to 0.6 W/cm 2 near-infrared (NIR) light) with ultrafast rotation (~7200 revolutions per minute) and rapid response (~650 ms). This photoactuator is operated based on a fundamentally different mechanism that depends on the synergistic interactions between the photothermal graphene and the hygroscopic agar/silk fibroin components, the subsequent aerodynamically favorable airscrew formation, the jet propulsion, and the aerodynamics-based flying. The soft helicopter-like photoactuator exhibits controlled flight and steering behaviors, making it promising for applications in soft robotics and other miniature devices.
研究领域:
材料科学
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仿生学
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软体机器人
✓ 已验证
DOI
PubMed
高影响因子
Science Bulletin
·
2023
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IF 18.9
Chen Li,Haoxuan Sun,Min Wang,Shan Gan,Da Dou,Liang Li
Perovskite solar cells offer great potential as a sustainable power source for distributed electronic devices that operate indoors. However, the impact of advanced lighting technology , especially the widely used pulse width modulation (PWM) technology, on perovskite photovoltaics has been ignored. Herein, for the first time in photovoltaics, we find that the light impact emitted by the PWM lighting system caused dynamic strain in perovskite thin films , induced phase separation, and accelerated the generation of metallic lead (Pb 0 ) defects, leading to irreversible degradation of the cell performance after 27 h ( T 80 ). To address this issue, formamidinium triiodide (FAI 3 ) is chosen to treat the surface of the perovskite and release residual stress, resulting in reduced lattice deformation during dynamic strain processes. Meanwhile, it suppresses harmful Pb 0 defects and reduces V oc loss at low light intensity . The champion device achieves impressive power conversion efficiency (PCE) of 35.14% and retains 99.5% of the initial PCE after continuous strobe light soaking for 2160 h.
研究领域:
材料科学
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光伏技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Plants-Basel
·
2021
·Vol. 10
·期 1
·176
·
IF 3.935
Yubin Zhang,Lingyan Zha,Wenke Liu,Chengbo Zhou,Mingjie Shao,Qichang Yang
To study the effects of light quality of continuous light before harvest on the growth and ascorbic acid (AsA) metabolism of lettuce (Lactuca sativaL.) grown under relative high nitrogen level, lettuce plants grown under different nitrogen levels (8, 10 and 12 mmol·L−1) were subjected to continuous light with different red: blue light ratios (2R:1B and 4R:1B) before harvest. The results showed that the shoot fresh weight of lettuce under 12 mmol·L−1nitrogen level was significantly higher than that under other treatments. There were no significant differences in shoot dry weight, root fresh weight, root dry weight, soluble sugar content, nitrate content and AsA content in leaves among the treatments at different nitrogen levels. The content of AsA in leaves was significantly higher than that in petioles before and after continuous light. Under the same nitrogen level, the fresh weight of lettuce under continuous light quality 4R:1B was significantly higher than that under other treatments. The content of AsA in lettuce leaves increased in different degrees after continuous light before harvest. High yield and AsA content could be obtained by 72 h continuous light with red and blue light 4R:1B at 12 mmol·L−1nitrogen level. After continuous light, the content of AsA increased significantly due to the increase of the ratio of red light and nitrogen level, which increased the activities of L-galactono-1,4-lactone dehydrogenase (GalLDH) and dehydroascorbic acid reductase (DHAR) involved in AsA synthesis and in the recycling of DHAR to AsA respectively.Keywords:ascorbic acid metabolism;nitrogen levels;light quality;continuous light;LEDs
研究领域:
植物生理学
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农学
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园艺学
✓ 已验证
DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2025
·
IF 4.2
Yizhi Shao,Dandan Liu,Qinwei Xia,Zhendong Song,Wei Chen,Ke Sun,Changjiang Zhou,Yangyang Xu,Tao Gong
The elongation of π-conjugation could efficiently enhance the photophysical performances or photochemical reactivties of organic molecules, which adapts to the requests of both designing fluorescent materials and organic photoinitiators (PIs). However, there is no work attempted to design organic PIs with large molar extinction coefficients and long π-conjugation lengths by using hybridized local and charge-transfer (HLCT) method, which is meaningful to obtain high-performance PIs with significant fluorescence/photoluminence properties. What's more, how to overcome the obstacles derived from the unbalance between high triplet concentrations and photoinitiation abilities of organic PIs seems to be crucial, while PI's design from a view of excited state were rarely reported for rational regulation strategy up to now, we thus introduced four chromophores with D-A structures designed by HLCT method, whose triplet states were confirmed by Ultra-fast absorption spectroscopy, into photopolymerzation, where LEDs in various wavelengths were utilized as the light sources in the present work. Noticeably, some of these dyes could furnish high monomer conversions and rapid photopolymerization rates, not only under the irradiation of 405 nm LED, but also long-wavelength light source at 660 nm, which have been confirmed by the photopolymerization kinetics and 3D printing technique. Here, the spin-orbit coupling (SOC) coefficients were carried out as well, to examine their effects on photoinitiation abilities of investigated molecules, which can be regarded as the first attempt to achieving light-harvesting PIs from excited state design. Finally, the corresponding photochemical mechanisms were investigated by steady state photolysis, fluorescence quenching experiments, particularly by frontier orbit energy and distributions to examine the interactions between these dyes with co-initiator/additives in details.
研究领域:
材料科学
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有机化学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY CONVERSION AND MANAGEMENT
·
2023
·
IF 10.4
Yinan Li,Jun Wang,Chenglong Fu,Liulian Huang,Lihui Chen,Yonghao Ni,Qinghong Zheng
Green cellulose- based solar light capturing composite films made of carbon nanotubes (CNT) and cellulose nanofibrils (CNF), with high photothermal conversion performance, were designed and developed. Thanks to the strong electrostatic interactions between carboxyl- rich CNFs (obtained from 2, 2, 6, 6-tetramethylpiperidine-1-oxyl (TEMPO) mediated oxidation), and cationic-modified CNTs using cetyltrimethylammonium bromide, the resultant CNT/CNF composite (FTC) films are uniform and exhibit excellent mechanical properties. More importantly, the effect of CNT/CNF ratio in the FTC films on their photothermal conversion capacity and coefficient of thermal expansion (CTE) was investigated. The FTC film with 50 % CNT incorporation shows both high photothermal conversion capacity and high negative CTE, and its application for solar energy harvesting was explored, including seawater desalination, photothermal power generation and light- driven actuators. The FTC film exhibits high light-induced desalination capability, with water evaporation rate reaching 1.23 Kg m -2 h - 1 at an irradiance of 1 kW m - 2 (evaporation efficiency of 84.5 %) and ion concentrations in purified water decreasing by 4 orders of magnitude. The FTC film can also be assembled into photothermal power system, achieving an output voltage of 310 mV at an irradiance of 3 kW m - 2 . With the assistance of a boost module, it can be used to re-charge a cell phone. A light-driven FTC/polytetrafluoroethylene (PTFE) double- layered actuator was also designed. Benefiting from the negative CTE of the FTC film, the actuator has a high sensitivity and achieves a bending curvature of 3.3 cm - 1 at an irradiance of 0.74 kW m - 2 . This study presents a scalable, yet simple strategy to design green/sustainable cellulose- based solar energy harvesting devices that can have multiple applications.
研究领域:
材料科学
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纳米技术
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能源工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2023
·Vol. 25
·期 21
·8869-8884
·
IF 9.8
Tian Gao,Shengnan Guo,Jiaojiao Zhang,Jintao Chen,Shiru Yin,Na Peng,Qun Cai,Huan Xu,Yi Liu
The synthesis of low-cost and high-efficiency multicolour emitting graphene quantum dots (GQDs) is of utmost importance for their prospective applications. Lignin, a renewable biomass, contains aromatic compounds that are well-suited for the preparation of polycyclic aromatic GQDs. In this study, we successfully synthesized red, yellow, green, and blue light-emitting single-layered GQDs with high crystallization using hydrothermal methods, thereby covering the full spectrum of visible light. High-resolution transmission electron microscopy (HRTEM) images revealed the presence of a two-dimensional crystal lattice with the 100 (0.21 nm) and 002 (0.24 nm) facets of graphite, indicating the high crystallization of the synthesized GQDs. Additionally, the average height of all GQDs was found to be below 1 nm, confirming their single-layered structure. This observation supports the notion that mono-benzene compounds tend to form fused polycyclic arenes under high pressure and temperature conditions. Moreover, by analyzing X-ray Photoelectron Spectroscopy (XPS) and Fourier Transform Infrared (FT-IR) spectra, we investigated the formation mechanism of GQDs derived from lignin at the molecular level. The cleavage of ether bonds, aldol condensation, benzylic acid rearrangement, and dehydration were identified as vital intermediate processes. Furthermore, we successfully demonstrated the application of multicolour-emitting GQDs derived from lignin in light-emitting diodes (LEDs). This synthetic strategy for producing multicolour-emitting GQDs from lignin opens up a new path for the conversion of sustainable biomass into high-value nanomaterials.
研究领域:
材料科学
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化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2020
·Vol. 7
·期 4
·1902688
·
IF 15.84
Zifei Wang,Yang Liu,Shijie Zhen,Xiaoxi Li,Weiguang Zhang,Xun Sun,Baoyuan Xu,Xue Wang,Zhenhua Gao,Xiangeng Meng
Fluorescent carbon dots (CDs) are compelling optical emitters to construct white light-emitting diodes (WLEDs). However, it remains a challenge to achieve large-scale and highly efficient single-component white-light-emissive CDs suitable for WLED applications. Herein, a low cost, fast processable, environmentally friendly, and one-step synthetic approach is developed for the preparation of gram-scale and highly efficient single-component white-light-emissive carbonized polymer dots (SW-CPDs). It is revealed that hybrid fluorescence/phosphorescence components cooperatively contribute to the emergence of white light emission. The SW-CPDs exhibit a record quantum yield (QY) of ≈41% for the white light emission observed in solid-state CD systems, while the QY of the phosphorescence is ≈23% under ambient conditions. Heavy doping of N and P elements as well as presence of covalently cross-linked polymer frameworks is suggested to account for the emergence of hybrid fluorescence/phosphorescence, which is supported by the experimental results and theoretical calculations. A WLED is fabricated by applying the SW-CPDs on an UV-LED chip, showing favorable white-light-emitting characteristics with a high luminous efficacy of 18.7 lm W −1 that is comparable to that of state-of-the-art WLEDs reported before.
研究领域:
材料科学
·
光学工程
·
化学工程
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Xinyue Guo,Qiyue Zhou,Xuefeng Fan,Qinyan Zhu,Ming Jin
Photopolymerization is a burgeoning technology with a wide range of applications from coatings and inks to nanotechnology. The development of photosensitized systems that can work at long wavelengths with safety and environmental friendliness, such as visible light-emitting diodes and near infrared light, is essential. In this study, a series of ketone dyes containing heteroatom/heterocyclic substituents were designed on the basis of the carbazole–coumarin backbone to compare with aryl ring-substituted ones. The photophysical and photochemical properties of the dyes were studied by UV–vis spectroscopy, time-dependent density functional theory calculations, fluorescence spectroscopy, and steady-state photolysis. The potential application of dyes in one/two-photon polymerization was investigated. Results showed that the introduction of heterocycles/heteroatoms has a considerable influence on the absorption and polymerization properties of dyes. CCK–Th, which contains a thiophene substitute, exhibits the most excellent light absorption properties as well as the fastest reaction efficiency with amine additives. Notably, when comparing the two-photon lithography capability, the photoresist containing 0.1 wt % CCK–Th, which can achieve a writing speed of 46 mm s–1, exhibits high two-photon sensitivity, about two times that of the benzene ring-substituted CCK–Ben. In addition, CCK–Th shows outstanding ability to construct complex three-dimensional patterns. These modified CCKs show great application potential in nanotechnology, additive manufacturing, and optoelectronics and provide design concepts for the development of photoinitiators.
研究领域:
材料科学
·
光学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）