FUEL
·
2025
·
IF 7.5
Lina Dai,Xianglan Dong,Enqi Zhang,Yanduo Liu
Against the backdrop of global energy and environmental challenges, research on the photocatalytic conversion of methane to methanol has made significant progress. ZnO photocatalyst, despite its many advantages, suffers from rapid recombination of photogenerated electrons and holes in single ZnO, leading to low charge separation efficiency and thus limiting the solar energy conversion efficiency. The mixed-crystal heterostructure formed by ZnO and ZnWO 4 significantly improves photocatalytic efficiency by effectively separating and utilizing high-energy-level electrons. The conduction band of ZnWO 4 serves as an ideal “bridge” for the high-energy-level electrons generated on ZnO, enabling these electrons to quickly transfer to the conduction band of ZnWO 4 , thus avoiding rapid relaxation and recombination within the conduction band of ZnO. The optimal sample achieved a methanol yield of 72 μmol/g/h, with a total carbonyl compound yield near 100 μmol/g/h, accounting for 97 % of the entire product system. This opens new avenues in the field and provides a model for the development of related composite photocatalysts, offering hope for significant breakthroughs and progress in energy conversion and utilization.
研究领域:
材料科学
·
能源化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2020
·
IF 3.233
Kai Xu,Dongliang Li,Yongfang Yuan,Jiwen Xu,Hua Wang,Lihui Wang,Zongliu Lu,Liming Liu,Zhidong Lin,Xiaowen Zhang
Electron injection governs electro-optic performance of organic light-emitting diodes (OLEDs) with intractable inverted architecture. Solution process with low cost and scalable manufacturing drives a lab-to-fab journey of electron injection layer (EIL) in OLEDs. Herein, a facilely solution-processed composite EIL of ZnO + Cs 2 CO 3 with robust electron injection has been explored for constructing ultraviolet OLED with inverted architecture. Using 3-(4-biphenyl)-4-phenyl-5- tert -butylphenyl-1,2,4-triazole as emitter, attractive short-wavelength emission of 380 nm and full-width at half-maximum of 37 nm are demonstrated in the inverted ultraviolet OLED. It achieves maximum radiance of 2.42 mW/cm 2 and external quantum efficiency of 0.85% with improved operation durability, which are superior or comparable to the corresponding references using single EILs of Cs 2 CO 3 , ZnO and LiF, or double-stacked EIL of ZnO/Cs 2 CO 3 . X-ray photoelectron spectroscopy analysis clarifies that the Cs 2 CO 3 , ZnO and ZnO + Cs 2 CO 3 exhibit exceptional electronic properties. The current-voltage characteristics and impedance spectroscopy analysis of electron-only cells confirm that ZnO + Cs 2 CO 3 behaves robust electron injection and accounts for excellent device performance. Our results pave an alternative approach for advancing ultraviolet OLED with inverted architecture and facile solution process.
研究领域:
材料科学
·
光电工程
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Zhe Lin,Zhengcai Guo,Xiaohong Wang,Jinchun Tu,Delun Chen,Yang Cao,Qiang Wu
MoS 2 is an attractive electrochemical sensing electrode material for the detection of biomolecule because of its adjustable band gap, large surface area, and unique electrochemical characteristics. However, the poor catalytic and electrical conductivity of the semiconductor 2H-phase MoS 2 and the phenomenon of restacking during electrochemical use hinder its sensing application. Herein, electron injection engineering is employed for the formation and stabilization of high-concentration metal 1T-phase MoS 2 nanosheets on ionic liquid-functionalized carbon nanotubes (CNTs-IL). The increase of MoS 2 concentration in the metal 1T phase significantly accelerates electron transfer kinetics. The in-situ growth method results in a tightly interfaced coupling effect, thereby substantially shortening the electron transport pathway and decreasing interfacial transmission impedance. In addition, the sulfur defects on the surface of MoS 2 as the anchoring point of sulfhydryl groups promote the enrichment of thiols on the surface of the material and reduce the reaction barrier for sulfhydryl oxidation, thereby improving the catalytic performance. The prepared CNTs-IL-MoS 2 /SPE biosensor shows excellent l -cysteine sensing performance by electrochemical detection.
研究领域:
材料科学
·
生物传感
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Zheng Yizhen,Lin Xing,Li Jiongzhao,Chen Jianan,Wu Wenhao,Song Zixuan,Gao Yuan,Hu Zhuang,Wang Huifeng,Ye Zikang,Qin Haiyan,Peng Xiaogang
Quantum-dot optoelectronics, pivotal for lighting, lasing and photovoltaics, rely on nanocrystalline oxide electron-injection layer. Here, we discover that the prevalent surface magnesium-modified zinc oxide electron-injection layer possesses poor n-type attributes, leading to the suboptimal and encapsulation-resin-sensitive performance of quantum-dot light-emitting diodes. A heavily n-doped nanocrystalline electron-injection layer—exhibiting ohmic transport with 1000 times higher electron conductivity and improved hole blockage—is developed via a simple reductive treatment. The resulting sub-bandgap-driven quantum-dot light-emitting diodes exhibit optimal efficiency and extraordinarily-high brightness, surpassing current benchmarks by at least 2.6-fold, and reaching levels suitable for quantum-dot laser diodes with only modest bias. This breakthrough further empowers white-lighting quantum-dot light-emitting diodes to exceed the 2035 U.S. Department of Energy’s targets for general lighting, which currently accounts for ~15% of global electricity consumption. Our work opens a door for understanding and optimizing carrier transport in nanocrystalline semiconductors shared by various types of solution-processed optoelectronic devices.
研究领域:
材料科学
·
光电子学
·
半导体物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Xinglin Jiang,Xiang Chu,Xiong Zhang,Yanting Xie,Tao Yang,Junfeng Huang,Wen Li,Weili Deng,Haitao Zhang,Weiqing Yang
The extraordinary pseudocapacitance of polyaniline (PANI) can be only realized in acid electrolytes with a limited potential window of 0.6∼0.8 V. As the potential further increases, PANI will suffer from the hydrolysis issue, leading to molecular-chain fracture and oxidative failure. In this work, we propose a strategy of surplus electron injection to stabilize the molecular chain of PANI at high cell potential. The surplus electron injection in 2D PANI is realized by exceeding the stable potential induced by an asymmetric supercapacitor structure design. As excessive charges are poured, supramolecular hydrogen bonds presented at 2D PANI capture them and generate additional redox reaction , which suppresses the damage of 2D PANI molecular structure and simultaneously strengthens its capacitive behavior. This effect is vividly demonstrated by the modulated electronic structure as indicated by shifting up the Fermi level , shifting down the work function and increasing the electrical conductivity. Consequently, high cell potential (1.2 V) 2D PANI supercapacitors with sulfuric acid electrolyte deliver a much longer cycling lifetime (76.8% vs. 45.1% after 10,000 cycles) and a much higher energy density (19.9 vs. 7.53 Wh kg ‒1 ) than that of low cell potential (0.8 V) 2D PANI counterpart. This work guides to a novel way to design high cell potential aqueous-solution supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2024
·
IF 8
Mengyuan Chen,Qian Li,Yangyang Bian,Shuaibing Wang,Binbin Hu,Aiwei Tang,Fei Chen,Yanbing Lv,Huaibin Shen
The external quantum efficiencies (EQE) and luminances of red InP-based and blue ZnTeSe-based quantum dot light-emitting diodes (QLEDs) have exceeded 20% and 80 000 cd m −2 , respectively, and the T 50 @100 cd m −2 (time for the luminance decreasing by 50%) operational lifetime of red InP-based QLEDs also have exceeded 1 000 000 h, nearing industrial application standards. However, the low EQE, luminance, and inferior lifetime of green InP-based QLEDs restrict the application for their full-color Cd-free display and lighting applications. The large electron injection barrier and severe exciton quenching caused by defect states of ZnMgO (ZMO) nanoparticles (NPs) lead to lower electron concentration in the emitting layer, which results in reduced radiative recombination. Here, with the surface passivation of MgCl 2 , the exciton quenching sites are significantly suppressed, and the electron injection barrier is reduced owing to the conduction band minimum (CBM) levels upshift of ZMO. As a result, a high EQE of 21.43%, maximum luminance of 25 5985 cd m −2 , along with a long T 50 @1000 cd m −2 (over 4 600 h) and T 50 @100 cd m −2 (over 290 000 h) operational lifetime is achieved for green InP-based QLEDs. These values have all exceeded the previous best values of green InP-based QLEDs.
研究领域:
材料科学
·
光电技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 24
·8206-8212
·
IF 7.059
Chunxiu Zang,Hui Wang,Shihao Liu,Wenbin Guo,Letian Zhang,Wenfa Xie
TiO2 is widely used in optoelectronic devices especially organic solar cells due to its excellent optical and electrical properties. However, its application in organic light-emitting devices (OLEDs) as an electron injection layer (EIL) usually suffers from insufficient electron injection and serious interfacial quenching, leading to low efficiency. In this work, efficiency enhancement of inverted OLEDs (IOLEDs) based on a TiO2 EIL by introducing various interlayers (ILs) is reported. Polyethylenimine (PEI), 10,10′-[5-(6-[1,1′-biphenyl]-4-yl-2-phenyl-4-pyrimidinyl)-1,3-phenylene] bis[9,10-dihydro-9,9-dimethyl-acridine] (DMAC-BPP) and 2,2′,2′′-(1,3,5-benzinetriyl)-tris(1-phenyl-1-H-benzimidazole) (TPBI) are adopted as ILs to reduce quenching, improve electron injection by achieving stepped energy levels and achieve efficient exciton confinement. Compared with devices using PEI/TPBI interlayers, over 40% enhancement of the maximum external quantum efficiency (EQEmax) for TiO2-based IOLEDs by introducing DMAC-BPP interlayers is achieved. Furthermore, efficient carrier confinement and more balanced carrier injection are achieved by inserting a thin TPBI between DMAC-BPP and the emitting layer (EML), and then, the EQEmax is improved to 17.68%, which is the highest record for TiO2-based IOLEDs.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Haoliang Huang,Junying Huang,Weipeng Liu,Yueping Fang,Yingju Liu
As one of the most promising Pt alternatives for cost-effective hydrogen production, molybdenum disulfide (MoS2), although has been studied extensively to improve its electrocatalytic activity, suffers from scarce active sites, low conductivity, and lack of interaction with substrates. To this end, we anchor ultradispersed and single-layered MoS2 nanoflakes on graphene sheets via a hybrid intermediate (MoOx–cysteine–graphene oxide), which not only confines the subsequent growth of MoS2 on the graphene surface but also ensures the intimate interaction between Mo species and graphene at the initial stage. Mo–O–C bond and a possible residual MoO3–x layer are proposed to comprise the interface bridging the two inherent incompatible phases, MoS2 and graphene. This strongly coupled structure together with the highly exposed MoS2 morphology accelerates the electron injection from graphene to the active sites of MoS2, and thus the hydrogen evolution reaction (HER) can achieve an overpotential of ∼275 mV at ∼−740 mA cm–2, and a Pt-like Tafel slope of ∼35 mV dec–1. Our results shed light on the indispensable role of interfacial interaction within semiconducting material–nanocarbon composites and provide a new insight into the actual activity of MoS2 toward the HER.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2022
·Vol. 24
·期 12
·7521-7530
·
IF 3.945
Qixiao Gai,Shoutian Ren,Xiaochun Zheng,Wenjun Liu,Quanli Dong
Low-cost and high-abundance Cu nanostructures are potential near-infrared (NIR) surface plasmonic resonance (SPR) photosensitizers for carbon nitride (C3N4) photocatalysts, but their low activity and stability need to be improved. In this article, doping S into C3N4 (S-C3N4) creates anchoring sites for photo-deposited Cu nanoparticles (NPs), and the spontaneous construction of S-Cu bonds is realized between S-C3N4 and Cu NPs. The optimal hydrogen evolution rate of 1.64 mmol g−1 h−1 is obtained for S-C3N4–Cu, which is 5.5, 4.6 and 1.7 times that of pure C3N4, S-C3N4 and S-C3N4–Cu, respectively. With further loading of a Pt co-catalyst to confirm the role of Cu NPs and improve the photocatalytic activity of the SCN–Cu, the photocatalytic rate can reach up to 14.34 mmol g−1 h−1. Due to the NIR SPR effect of Cu NPs, the apparent quantum efficiency (AQE) of S-C3N4–Cu at 600 and 765 nm is 2.02% and 0.47%, respectively. The enhanced photocatalytic performance of S-C3N4–Cu compared with C3N4–Cu is mainly due to the introduced S–Cu bonds that improve the injection rate of hot electrons. This solution provides a simple and efficient interface optimization strategy for the construction of efficient NIR-driven photocatalysts.
研究领域:
材料科学
·
光催化
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2020
·Vol. 9
·期 1
·2001505
·
IF 8.286
Liang Chen,Sui Mao,Pu Wang,Zhao Yao,Zhonglin Du,Zhijun Zhu,Laurence A. Belfiore,Jianguo Tang
Hot-electron injection induced by plasmon decay enables ultrafast electron transfer in femtosecond scale and therefore endows metallic nanoparticles (MNPs) promising potentials in high-speed optoelectronics. With much higher density of states next to its Fermi level, palladium (Pd) can more efficiently launch hot electrons according to the theoretical prediction, as compared to the conventional plasmonic NPs. In this work, the optical properties of Pd NPs as well as the plasmon induced hot-electron injection are investigated through confocal Kelvin probe force microscopy. Analysis based on surface potential redistribution suggests Pd NPs can initiate dense hot-electron transfer in visible range. According to the photocurrent characterization of photo field effect transistors, in cooperation with TiO x the Pd NPs launch a rapid photocurrent increase with the excitation of 450 nm light as the hot-electron injection improves the electron depleting situation in TiO x thin film. The result confirms that Pd hot electrons can be energetic at visible range for photoelectric applications.
研究领域:
材料科学
·
光学工程
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
OPTIK
·
2019
·
IF 1.914
Hui Zhao,Huaiyi Ding,Sijia Li,Mei Liu,Jinlong Yang,Yilong Zhao,Nan Pan,Xiaoping Wang
Interface engineering of the perovskite light emitting diodes (PeLED) and the balance between electron and hole injections are essential to optimize the device performance. In this paper, we fabricated the PeLEDs with the structure of ITO/NiO/CsPbBr 3 QDs/ZnO/Ag and used an Al-doped ZnO (AZO) as inserting layer between the ZnO and Ag cathode. It is found that the electron injection can be remarkably modulated by the thickness ratio of ZnO to AZO. Consequently, the maximum luminance and external quantum efficiency of green PeLED with ZnO/AZO (15 nm/15 nm) show a 1.9-fold and 1.7-fold enhancement as compared to the device only with ZnO. At the same time, the turn-on voltage of the device is also reduced from 3.5 V to 2.7 V.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Zhenfei Yang,Xinnian Xia,Wenwu Yang,Longlu wang,Yutang Liu
The molecular oxygen activation (MOA) process tends to be the rate-limiting step for photocatalytic selective organic transformation such as aromatic alcohol oxidation . Herein, using the plasmonic 0D/2D W 18 O 49 /ZnIn 2 S 4 (WOZ) heterojunctions as a model system, we firstly shed light on the ultra-efficient MOA origin of the synergism of photothermal effect and continuous hot electrons injection through both experimental and DFT calculations. This synergistic action not only enhances the generation rate of •O 2 ¯ and reduces the activation energy barrier, but also significantly increases the adsorption of the O 2 and activates it more easily, thus achieving efficient photocatalytic selective oxidation of benzyl alcohol to benzaldehyde. Meanwhile, the charge separation and transfer processes involved in O 2 activation can be further optimized with the Z-scheme transfer route. This work would provide an exciting opportunity to construct more active photothermal catalysts with ultra-high efficiency of MOA for a wide variety of organic transformations with solar energy.
研究领域:
催化化学
·
材料科学
·
理论计算
✓ 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）