Laser & Photonics Reviews
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2025
·
IF 10
Yanyu Deng,Zhiguo Zhang,Guanhua Ren,Wenwen Liu,Zhuowei Li,Chunyu Liu,Zhiqi Li,Wenbin Guo
Organic–inorganic hybrid perovskite is emerging as one of the most promising light source technologies. Various interfacial agents have been widely used on perovskite surfaces, aiming to achieve high brightness and stability in perovskite light-emitting diodes (PeLEDs) by eliminating the adverse effects of excess organic halide residues. However, there are only scattered reports available on the unreacted halide distribution, interfacial solvent effect, and cost-performance for surface engineering, calling for low-cost strategies to address these challenges. Here, the distribution of unreacted halide species is visualized and the effect of solvent-dominated surface reconstruction on performance is pointed. Experimental and computational studies reveal that the surface lattice distortion caused by the interaction between solvents and crystals increases non-radiative losses, thus deteriorating device performance. By managing surface reconstruction using a low-cost mixture-solvent surface reconstruction strategy, cost-effective PeLEDs is obtained with a high radiance of 1103.31 W sr −1 m −2 and an extended lifetime of 84.8 h operated at a current density of 100 mA cm −2 , representing the highest brightness for FAPbI 3 -based PeLEDs.
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Laser & Photonics Reviews
·
2024
·
IF 9.8
Wenchen Ma,Zhenwei Ren,Hengfei Shi,Xueqing Xia,Xinwen Wang,Huifei Ji,Hua Chen,Chengzhao Luo,Chinhua Wang,Song Chen,Yu Chen
As an alternative electron transport material to the chemically unstable ZnO nanoparticles (NPs), SnO 2 NPs exhibit a great potential to construct high-performance quantum dot light-emitting diodes (QLEDs). However, only moderate device performance has been obtained for SnO 2 -based QLEDs due to the low electron mobility, unfavorable energy band, and massive defects of SnO 2 NPs. Herein, a strategy of transition metal doping is reported to achieve high-quality manganese-doped SnO 2 (Mn-SnO 2 ) NPs to address the above problems. Specifically, the large bond energy of Mn─O bonds reduces the oxygen vacancy defects, prompting an effective suppression of the interfacial exciton quenching for massive radiative recombination. Moreover, the favorable energy band and high electron mobility for Mn-SnO 2 promote efficient electron injection and transportation. The good optoelectronic properties for Mn-SnO 2 NPs contribute to a great enhancement in device efficiency from 8.2 to 11.4% and a remarkable improvement in lifetime ( T 95 ) from 565.3 to 1009.2 h at 1000 cd −2 , among the best performing ZnO-free QLEDs. Notably, the Mn-SnO 2 based QLEDs show a very superior shelf stability to the QLEDs based on SnO 2 and ZnO analogs. Consequently, this work reports an effective approach to achieve high-quality SnO 2 NPs for efficient and stable QLEDs.
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Photonics Research
·
2024
·Vol. 12
·期 9
·1927-1936
·
IF 6.6
Xiaoyun Hu,Jianfang Yang,Yufei Tu,Yufei Tu,Zhen Su,Fei Zhu,Qingqing Guan,Zhiwei Ma
Flexible quantum dot light-emitting diodes (QLEDs) show great promise for the next generation of flexible, wearable, and artificial intelligence display applications. However, the performance of flexible QLEDs still lags behind that of rigid substrate devices, hindering their commercialization for display applications. Here we report the superior performance of flexible QLEDs based on efficient red ZnCdSe/ZnS/ZnSe QDs (A-QDs) with anti-type-I nanostructures. We reveal that using ZnS as an intermediate shell can effectively confine the exciton wavefunction to the inner core, reducing the surface sensitivity of the QDs and maintaining its excellent emission properties. These flexible QLEDs exhibit a peak external quantum efficiency of 23.0% and a long lifetime of 63,050 h, respectively. The anti-type-I nanostructure of A-QDs in the device simultaneously suppresses defect-induced nonradiative recombination and balances carrier injection, achieving the most excellent performance of flexible QLEDs ever reported. This study provides new insights into achieving superior performance in flexible QD-based electroluminescent devices.
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Catalysts
·
2024
·Vol. 14
·期 10
·681
·
IF 3.8
Dezheng Li,Vilanculo Clesio Calebe,Yuqiao Li,Huimin Liu,Yiming Lei
Photocatalysis is a promising method for methylene blue (MB) degradation due to its effectiveness and environmental compatibility. Among the photocatalysts, titanium dioxide (TiO2) has been widely used for MB degradation due to its exceptional photocatalytic activity. However, the wide bandgap limits the degradation efficiency of TiO2under visible light. Here, an interstitial nitrogen-doped TiO2(5%NT/TiO2) used thiourea as the N source was fabricated for visible light-derived MB degradation. The 5%NT/TiO2exhibited an extended absorption range of visible light. Moreover, photoelectrochemical measurements showed an improvement in the photocurrent response and charge transfer behavior on N/TiO2. Thus, 5%NT/TiO2had enhanced photocatalytic activity compared with pristine TiO2and substitutive N-doped TiO2(5%NAB/TiO2). The accelerated photocatalytic MB degradation process on N/TiO2could be mainly attributed to the interstitial N doping, which caused the appearance of new energy states and extended optical properties. Through comparing the impact of interstitial and substitutive in TiO2activity, our work proposes a suitable form of element doping to enhance the optical properties and photocatalytic activity of TiO2and even other semiconductors, providing guidance for future work.
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ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 44
·2407232
·
IF 18.5
Sizhu Wu,Xinkai Li,Xin Liu,Haijian Hu,Rui Dong,Jincheng Ni,Deng Pan,Yanlei Hu,Chenchu Zhang,Chao Chen,Yachao Zhang,Haojie Xia,Dong Wu,Zhaoxin Lao
Capillary force self-assembly (CFSA) technology unfolds great potential in the fabrication of functional micro/nanostructures. To date, most self-assembly methods focus on monolithic microstructure manipulation yet it remains a challenge to achieve precise localized control over the CFSA process of micro/nanostructures. Herein, a light-regulated CFSA is proposed to realize the localized precise control of microstructures, leveraging on the synergistic effect of photothermally-responsive hydrogel and self-assembly technique. The micropillars with asymmetric cross-linking densities can readily prepare by applying a rationally designed laser and laser-exposing dosage, thereby realizing the on-demand steering of their bending directions. Significantly, owing to the giant capillary force deriving from the evaporating water, above micropillars can successfully assemble into highly-ordered chiral structures. Simulation coupling with fundamental hydrodynamics enables to shed light on the light steering principle over pillar's actuations. Last, on the basis of vortical dichroism spectra analysis, the chiral characteristics of light-regulated self-assembly including the chiral as well as the achiral self-assembled microstructures are successfully deployed. This strategy provides an avenue for fabricating the localized controllable self-assembly at the microscale and will bloom the field over metamaterials, microsensors, chiral optics, and so on.
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ORGANIC GEOCHEMISTRY
·
2024
·
IF 2.6
Wenna Liu,Wanglu Jia,Qiang Wang,Jian Chen,Jinbu Li,Ping’an Peng
The isotopic fractionation of organic compounds during evaporation is one of the most critical issues in the field of stable isotopes. The hydrogen (H) isotopic compositions of light hydrocarbons (LHs) in oil have gained increasing interest in the research of oil genesis in recent years. However, compared to carbon (C) isotopes, our understanding of H isotopic fractionation patterns and influences for various types of LHs during evaporation is limited. In this study, we performed evaporation experiments at a constant temperature on LHs in three systems: single compound, alkane mixture, and light oil. We assessed the contents and H isotopic compositions of individual LHs in the residual liquid phase. The degree of H isotopic fractionation and influencing factors are studied combined with C isotopes. The H isotopic fractionation of LHs exhibits “inverse isotope fractionation” characteristics (a depletion in D in the residual LHs) with progressive evaporation, which is opposite to the C isotopic fractionation. The degree of isotopic fractionation is influenced by the evaporation system, the compounds’ molecular weight, and their structure. (1) The isotopic fractionation degree of H and C decreases in the following order: light oil > alkane mixture > single compound system. This difference may be related to the unsaturation level of the evaporative system and the evaporation matrix. (2) For LHs with the similar structure in the same evaporation system, the degree of H isotopic fractionation increases with increasing molecular weight due to the buffering effect of the sample pool, while the magnitude of C isotopic fractionation decreases. (3) For LHs with the same C number, methylcyclohexane (MCH) has a lower evaporation rate and less isotopic fractionation than the other C 7 compounds like 3-methylhexane (3-MH), n -heptane ( n C 7 ), and toluene (Tol). The distinctive fractionation characteristics of H isotopes make them very useful in geological applications. Combining H and C isotopic compositions of the same compound with the commonly used molecular ratios of LHs (e.g., n C 7 /MCH, Tol/ n C 7 ) enables full differentiation of three critical processes controlling oil formation: evaporation, thermal maturation, and biodegradation. Furthermore, the differences in H isotopic compositions between C 7 LHs (3-MH, n C 7 , and Tol) may be changed by evaporation, but the variation range is much smaller than that caused by source differences. Therefore, combining H and C isotopes may have great potential for oil source characterizations.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Junli Xu,Zhengxi Li,Ran Wang,Xueqi Zhang,Xueping Zhang,Yingcong Wei,Xiaochuan Hou,Yunjian Liu
Effective combination of the photosensitive and photoactive units in metal–organic frameworks (MOFs) is vital to achieving efficient solar energy utilization for superior photocatalytic efficiency. In this study, we successfully organize photosensitive metalloporphyrin ligands and photoactive building units (Ti-oxo clusters) uniformly at a molecular level within a heterobimetallic metal–organic framework (MOF) nanostructure, denoted as TMF(X), where X represents Zn, Co, or Cu. The well-accessible Ti sites possess a close proximity to the metalized porphyrin, which is favorable for the electron-transfer kinetics to the photocatalytic center for the redox reaction. Furthermore, the metal ions at the porphyrin center are able to induce electron redistribution, more negative conduction band potential, and enhanced light absorption, which boosts the photocatalytic H2 evolution performance. Notably, the resulting heterobimetallic MOF nanostructures exhibited remarkably enhanced photocatalytic H2 evolution performance, especially for the nano TMF(Zn) with a maximum H2 evolution rate of 3.24 mmol g–1 h–1 under visible light irradiation, which is much higher than that of TMF (1.40 mmol g–1 h–1). Our work opens up a way for highly efficient MOF-based photocatalysts for H2 evolution and beyond.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Jiakang Hu,Qiaohui Ruan,Yanyu Cui,Siyuan Ye,Zhuohan Lin,Xue Zhang,Yan Li
CsPbI3 nanoplatelets (NPLs) are considered potential candidates for orange-red light-emitting materials due to their high exciton binding energy and narrow full width at half maximum (FWHM). However, the relatively low formation energy of CsPbI3 NPLs leads to rapid growth rates, posing a challenge for the controlled synthesis of high-quality CsPbI3 NPLs. Herein, we report the synthesis of high-quality CsPbI3 NPLs emitting orange-red light using a one-pot method under mild reaction conditions. The protonation of oleylamine (OAm) by introducing HI and the strong interaction between the octadecylphosphonic acid (ODPA) ligand and Pb2+ facilitate the anisotropic growth of CsPbI3 NPLs and enable precise control over the numbers of NPL layers, achieving the desired orange-red light emission. The resulting CsPbI3 NPLs exhibited a high photoluminescence quantum yield (PLQY) of up to 90%, a narrow FWHM of only 25 nm, and excellent stability at room temperature, under ultraviolet–visible light and in aqueous environments. The comprehensive study of the formation process of CsPbI3 NPLs enriches our understanding of the growth mechanism and provides a synthetic route for producing high-quality CsPbI3 NPLs.
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ELECTROPHORESIS
·
2024
·
IF 3
Deyu Li,Rui Jiang,Jun Li,Zhen Liu,Yasmeen Zamir Ahmed,Qiankun Zhao,Yongxin Song,Mengqi Li
The viability detection of microalgae with the electrokinetic (EK) technique shows vast applications in the biology and maritime industry. However, due to the slight variations in the EK properties between alive and dead microalgae cells, the accuracy and practicability of this technique is limited. In this paper, the light illumination pretreatment was conducted to modify the EK velocity of microalgae for enhancing the EK difference. The effects of the illumination time and light color on the EK velocities of Chlorella vulgaris and Isochrysis galbana were systematically measured, and the EK differences between alive and dead cells were calculated and compared. The results indicate that under light illumination, the photosynthesis of the alive cells leads to the amplification of the zeta potential, leading toward increase in the EK difference along with the illumination time. By using light with different color spectra to treat the microalgae, it was found that the EK difference changes with the light color according to the following order: white light > red light > blue light > green light. The difference in EK potential with exposure to white light treatment surpasses over 10-fold in comparison to those without such treatment. The light pretreatment technique, as illustrated in this study, offers an advantageous strategy to enhance the EK difference between living and dead cells, proving beneficial in the field of microalgae biotechnology.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xiaoyong Zhang,Shengyue Liang,Fan Li,Yongping Bai
Emerging light-driven mechanically mutable soft matters showcase profound potential for sophisticated manipulation and various applications. However, the realization of a versatile and straightforward fabrication technique has been absent in photoresponsive hydrogel. Inspired by mussel adhesive protein and boronic ester-based dynamic covalent bonds, near-infrared (NIR) light-triggered adhesive hydrogels (PBD gel) with the permanent mechanical characters reconfiguration capability are prepared. The hydrogel consists of catechol-based polymer as adhesive units and thermal responsive boronic ester as physical cross-linking junctions, which combines their covalent character to achieve stiffness and their dynamic nature for fast and reversible transition to soft elastics. Taking advantage of the catechol-B(OH) 4 - coordination, the adhesive behavior and permanent mechanical performances of the PBD gel could be reconfigured. On the basis of the light switchable transformation between stiffness and elasticity at room temperature, we demonstrated precise control over nonplanar substrates especially adaptable in multidimensional structures designed for tasks such as wearable sports sensors on the human skin and intelligent robots grabbing objects. When it is assembled into an electronic device, it can transmit information and recognize sign language via Morse code. Overall, we report the hydrogel here advances user-friendly and versatile light control technologies, unlocking new possibilities for various applications, promoting the development of intelligent soft photonic and electronic sensing technologies.
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Analytical Methods
·
2024
·
IF 2.7
Zhaoze Lu,Jian Yu,Kaihua Wang,Wei Cheng,Likai Hou
Micro-droplets have significant applications in microbiologies, pharmaceuticals, cosmetics, and synthetic materials. Here, we present for the first time a near-infrared (NIR) light-triggered double-emulsion drop (DED) bursting method for generating a large number of micro-droplets in several micron. Under the irradiation of NIR light, the inner water phase of the DED containing a trace amount of Prussian blue (PB) rapidly heats up and evaporates rapidly to generate microbubbles due to the photothermal property of PB. By controlling the light intensity, the DED can inflate itself by coalescing these constant microbubbles to burst immediately and tear the middle oil phase to form a large number of micro-droplets. The performance of micro-droplets generated by NIR light-triggered DED bursting is investigated at different oil shell thickness (HO), oil phase viscosity (ηO) and oil type. HO and ηO are both key factors affecting the generation of micro-droplets. DED with lower HO and ηO can generate lower polydispersity and large quantity of micro-droplets by NIR-triggered DEDs bursting. The proportion of micro-droplets below 10 μm can reach up to 95%. Furthermore, camellia oil, as middle oil phase of DEDs, also can be used to generate lower polydispersity and large quantity of micro-droplets in several micron. The presented bursting method has a great potential to generate micro-droplets for micro/nano and biotechnology applications.
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CATALYSIS LETTERS
·
2017
·Vol. 148
·期 1
·23-29
·
IF 2.799
Li Jinlin,Guan Weisheng,Yan Xu,Wu Ziyang,Shi Weidong
Abstract In this paper, LaFeO 3 nanoparticles were used as a visible light photocatalyst for efficient removal of 2,4-dichlorophenoxyacetic acid (2,4-D) with the assist of ozone. The pseudo-first-order kinetic rate constants of degrading 2,4-D removal in 60-PO/Vis in 1 h was 5.72 times as great as the sum of that when using LFO/O 2 /Vis and 60-Oz/Vis at the best concentration of ozone (60 mL/min). This improvement was attributed to the efficient synergistic effect between photocatalysis and ozonation triggered by LaFeO 3 . In PO/Vis, ozone facilitates the photo-generated electrons trapping and improves separation efficiency of photo-generated charges, which enhanced the yield of hydroxyl radical, so as to the degradation efficiency of organic pollutants. In addition, the effects of ozone concentrations on the photocatalytic ozonation processes were also studied. Moreover, we demonstrated the high stability and reusability of LaFeO 3 photocatalyst in photocatalytic ozonation process by circle experiment. Graphical Abstract Schematic illustration of the reaction mechanism of enhanced photocatalytic ozonation of 2,4-D by LaFeO 3 under visible light.
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