JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2024
·Vol. 35
·期 20
·1-9
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IF 2.8
Yan Caibo,Su Zhiwei,Zhao Zhuo,Zhou Yanwen
Leveraging the conductivity of In 2 O 3 and the wear resistance and anti-corrosion behaviour of SiO 2 and TiO 2 , In 2 O 3 , In 2 O 3 /SiO 2 and In 2 O 3 /TiO 2 films were prepared via magnetron sputtering to meet the transparency, conductivity, wear resistance and corrosion resistance requirements for external screens of wearable devices. The films exhibited excellent sheet resistance of 13–28 Ω·sq −1 , which fully met the conductivity criteria. Owing to the light interference effect, the average transmittance of the In 2 O 3 film (77%) was higher and lower than those of the In 2 O 3 /TiO 2 (69%) and In 2 O 3 /SiO 2 (83%) films, respectively. After soaking in sweat solutions for 48 h, the In 2 O 3 and In 2 O 3 /SiO 2 films maintained their optical and electrical properties and the In 2 O 3 /TiO 2 film was partially peeled off in the acid solution. The low transmittance and corrosion resistance of the In 2 O 3 /TiO 2 film were due to severe oxygen deficiency in the TiO 2 layer, indicated by the certain amount of Ti 2 O 3 and metal Ti in XPS. The wear failure time of the In 2 O 3 /SiO 2 film (42 h) was greater than those of the In 2 O 3 (30 h) and In 2 O 3 /TiO 2 (24 h) films because of its hard SiO 2 top layer. Based on the ‘parallel sheet resistance principle’, the resistivity of the double-layer films was mainly attributed to the conductive In 2 O 3 layers. The wear and corrosion resistances were ascribed to the top passive transparent layers, in which the SiO 2 layer showed its excellent optical and electrical performance stabilities before and after corrosion and wear resistance functions. With its commonly high transparency and conductivity as well as its high wear and corrosion resistances, the In 2 O 3 /SiO 2 film exhibits application potential for external screens of wearable devices.
研究领域:
材料科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Yang Zhang,Xintong Zhang,Dan Wang,Fangxu Wan,Yichun Liu
Introducing appropriate amount of oxygen vacancies by hydrogenation treatment is a simple and efficient way to improve the photoelectrochemical performance of nanostructured oxide photoanodes. However, the hydrogenation effect is often not durable due to the gradual healing of oxygen vacancies at or close to surface of photoanodes. Herein, we tackled the problem by conformal coating the hydrogenated nanoporous BiVO 4 (H-BiVO 4 ) photoanode with an ultrathin layer of amorphous TiO 2 . Photoelectrochemical measurements showed that a 4 nm-thick TiO 2 layer could significantly improve the stability of H-BiVO 4 photoanode for repeated working test, with negligible influence on the initial photocurrent compared to the uncoated one. Mott–Schottky and linear sweep voltammetry measurements showed that donor density and photocurrent density of the H-BiVO 4 electrode almost decayed to the values of pristine BiVO 4 electrode after 3 h test, while the amorphous TiO 2 -coated electrode only degraded by 6% and 5% of the initial values respectively in the same period. The investigation thus suggested that the amorphous TiO 2 layer did protect the oxygen vacancies in H-BiVO 4 photoanode by isolating these oxygen vacancies from environmental oxygen, while at the same time not impeding the interfacial charge transfer to water molecules due to its leaky nature.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Yanhua Tang,Na Ni,Nian Ding,Xinyu Yang,Wei Wei,Zeying Dou,Lei Jiang,Qianqian Su
To overcome the problems of small pore size and limited reaction space of silica colloidal crystal (SCC) films, an ordered porous polystyrene (PS) -TiO 2 interference enhanced substrate with large pore size, high porosity, good interference efficiency and transparency was developed by introducing a TiO 2 interference enhanced layer with dip-coating method. The obtained substrate consists of three parts: the nanoporous structure layer, the PS substrate layer, and the TiO 2 layer between the two layers. The optical and mechanical properties of the obtained substrate was studied and optimized. The results showed that the optimal thickness of the PS substrate layer was 0.2 mm and that of TiO 2 interference enhanced layer was between 200 ∼ 400 nm. Combined with the ordered porous layer interference (OPLI) system, a continuous flow biosensor platform for real-time monitoring of the specific binding of Staphylococcus aureus protein A (SPA) and human serum immunoglobulin G (hIgG) was constructed to simulate an antibody screening test. The signal response of the system was about 3.8 times that of the system constructed with SCC substrate under the same conditions. The development of this new substrate provides the necessary support for the application expansion of the OPLI system, and had good application prospects in antibody screening, target protein binding performance evaluation and antibody drug development.
研究领域:
生物传感器
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材料科学
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光学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF PHOTOENERGY
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2017
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IF 1.277
Dan Chen,Xiaoping Zou,Hong Yang,Ningning Zhang,Wenbin Jin,Xiao Bai,Ying Yang
The morphology of compact TiO2 film used as an electron-selective layer and perovskite film used as a light absorption layer in planar perovskite solar cells has a significant influence on the photovoltaic performance of the devices. In this paper, the spin coating speed of the compact TiO2 is investigated in order to get a high-quality film and the compact TiO2 film exhibits pinhole- and crack-free films treated by 2000 rpm for 60 s. Furthermore, the effect of annealing process, including annealing temperature and annealing program, on CH3NH3PbI3-XClX film morphology is studied. At the optimal annealing temperature of 100°C, the CH3NH3PbI3-XClX morphology fabricated by multistep slow annealing method has smaller grain boundaries and holes than that prepared by one-step direct annealing method, which results in the reduction of grain boundary recombination and the increase of Voc. With all optimal procedures, a planar fluorine-doped tin oxide (FTO) substrate/compact TiO2/CH3NH3PbI3-XClX/Spiro-MeOTAD/Au cell is prepared for an active area of 0.1 cm2. It has achieved a power conversion efficiency (PCE) of 14.64%, which is 80.3% higher than the reference cell (8.12% PCE) without optimal perovskite layer. We anticipate that the annealing process with optimal compact TiO2 layer would possibly become a promising method for future industrialization of planar perovskite solar cells.
研究领域:
材料科学
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光伏技术
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能源研究
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 38
·20195-20201
·
IF 8.867
Jiuwang Gu,Qitong Huang,Yufei Yuan,Kai-Hang Ye,Zilong Wang,Wenjie Mai
Unfavorable interfacial electron back-injection, sluggish surface kinetics, and poor bulk conductivity leading to remarkable recombination are the key issues which significantly hinder the solar-to-hydrogen efficiency of PEC photoanodes. In this study, Ti foil is employed as the substrate for fabricating BiVO4 photoanodes. Surface passivation of TiO2 is sophisticatedly designed to block interface recombination in solar water splitting for the first time, so that a significant two-fold increase in photocurrent and a large decrease in dark current are observed. In addition, to address the other two issues, CoOx oxygen evolution catalysts (OECs) and Mo/N doping are applied to increase the photocurrent density and applied bias photon-to-current efficiency to 5.04 mA cm−2 at 1.23 VRHE and 1.41% at 0.75 VRHE, respectively, under AM 1.5 G illumination, which suggests the great potential of integrating strategies to target specific issues in BiVO4 photoanodes.
研究领域:
材料科学
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能源科学
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光电化学
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2016
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IF 4.732
Xian Hou,Tongtong Xuan,Hengchao Sun,Xiaohong Chen,Huili Li,Likun Pan
ZnGa 2 O 4 :Eu 3+ nanophosphor was synthesized through a hydrothermal method and used as an effective light down-shifting/converting material in mesoporous TiO 2 layer of perovskite solar cells (PSCs). The nanophosphor can convert the high energy incident photon into the photon(s) with lower energy, which can excite CH 3 NH 3 PbI 3 to generate more photo generated electron–hole pairs, and thus promote the incident light use ratio and increase the power conversion efficiency (PCE) of PSCs. After the incorporation of suitable amount of ZnGa 2 O 4 :Eu 3+ into PSCs, the cell PCE is increased to 13.80% with a photocurrent density of 23.68 mA cm − 2 and a highest PCE of 14.34% with a photocurrent density of 25.02 mA cm −2 is achieved, much higher than those of the cell without ZnGa 2 O 4 :Eu 3+ (PCE of 10.67% and photocurrent density of 20.2 mA cm −2 ). The enhanced photovoltaic performance by incorporating the nanophosphor into PSCs should be ascribed to the increased incident light use ratio and improved exciton generation rate.
研究领域:
材料科学
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纳米技术
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太阳能
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光伏技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2021
·
IF 4.527
Lingling Cui,Hang Li,Jiewen Huang,Dangsheng Xiong
To improve the biotribological properties of Ti6Al4V alloy for artificial joints, motivated by the composite structure of ‘natural articular cartilage - subchondral bone’ and the hydration lubrication mechanism of articular cartilage, a soft/hard bilayer coating composed of a porous TiO 2 layer and a zwitterionic hydrogel coating was designed and fabricated on Ti6Al4V alloy through micro-arc oxidation (MAO) combined with ultraviolet (UV) radiation technology. Characterization results revealed that the bio-inspired bilayer coating could be successfully constructed on Ti6Al4V alloy, and such a coating displayed good hydrophilicity (WCA: 32°). Notably, by ball - on - disk friction test, this biomimetic bilayer coating exhibited an ultra-low friction coefficient (∼0.038) in PBS solution, which was reduced by an order of magnitude compared with that of the Ti6Al4V alloy substrate. This was due to the synergistic effects of soft/hard composite structure and the hydration lubrication of zwitterionic MPC polymer. This work provides a novel and effective strategy for surface modification of Ti6Al4V alloy for artificial joints.
研究领域:
生物材料
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表面工程
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摩擦学
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生物医学工程
✓ 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）