Silicon
·
2025
·
IF 3.3
Li Zhaorui,Li Zhiqiang,Wu Yonghong,Zhu Wenle,Nie Lifang,Liu Juncheng
To improve the efficiency of solar cells, antireflective films require not only high optical properties but also high mechanical properties. The antireflective films were prepared by tetraethylorthosilicate (TEOS) and methyltriethoxysilane (MTES) as precursors and fatty alcohol polyoxyethylene ether (AEO) as the porogen. The microstructures, optical properties, and mechanical properties of the prepared antireflective films were examined. The results indicated that the AEO volume ratio had an obvious effect on film porosity, refractive index and average transmittance. With the increase of AEO content, the film’s porosity and the average transmittance firstly increased then decreased, the refractive index firstly decreased then increased in the wavelength range of 400–1100 nm. In the meanwhile, both the film’s surface hardness and adhesion strength increased with the increasing of the AEO addition. When the volume ratio of AEO is 45%, the porosity of the film is 48%,the refractive index value for 550 nm wavelength is 1.26and the maximum transmittance is 98.50%.The highest amount of light passing through a material, also known as transmittance, is recorded at an average of 91.98%within the wavelength range of 400–1100 nm, which is 4.64%higher than that of blank glass. In addition, the hardness of the film reaches the highest level for soft films 9H, and its adhesion strength also reaches the highest level of the tape method, 0 grade.
研究领域:
材料科学
·
太阳能技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Yanan Gao,Juncheng Liu,Beiping Dong
Dust on outdoor glass will significantly reduce glass transmittance in various applications and even damage solar cell panels. Here, the effects of Sb doping on the structure and photoelectric properties of a Sb-doped SnO 2 –SiO 2 (ATO-SiO 2 ) film prepared on a glass substrate with a sol-gel method and the dust removal performance of the resulting film were studied. The results show that the Sb-doped SnO 2 –SiO 2 film consists of a SnO 2 tetragonal rutile phase, but the doped Sb decreases the sample crystallinity. With an increase in the Sb doping concentration, two lattice parameters of the ATO-SiO 2 film, a and c , show “M"-shaped changes. The nanoparticle size first decreases and subsequently increases when the Sb doping concentration is over 6 mol%. The transmittance of the substrate glass coated with this film in the visible wavelength range (380–780 nm) decreases from 86.3% to 82.7%. The square resistance first decreases and subsequently increases, while the dust removal performance first increases and subsequently decreases. At a 12 mol% Sb doping concentration, the square resistance is minimal (4.64 × 10 6 Ω/□). The maximal dust removal performance is 64%.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
CORROSION SCIENCE
·
2018
·
IF 4.862
Lian-Kui Wu,Wei-Yao Wu,Jia-Lin Song,Guang-Ya Hou,Hua-Zhen Cao,Yi-Ping Tang,Guo-Qu Zheng
Thickness controllable SiO 2 film was prepared on γ-TiAl alloy by cathodic electrodeposition . The oxidation behaviour of the specimens at 900 °C was studied. The effects of SiO 2 electrodeposition parameters, such as electrolysis time and deposition current density, on the morphology, structure and high temperature oxidation performance of the film were investigated. Results shown during thermal oxidation, the electrodeposited SiO 2 film could react with the TiAl alloy to form an alumina- and silicon-enriched glass-like oxide scale, which can prevent the inward diffusion of oxygen from air to the film/alloy interface, resulting in the remarkable decreased oxidation rate of the alloy.
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
高影响因子
OPTIK
·
2021
·
IF 2.443
Beiping Dong,Yanan Gao,Juncheng Liu
High transmittance and strong dust-removing film has a broad potential application prospect in architectural glass, solar photovoltaic glass, automotive glass, etc. In this paper, SnO 2 is used as the antistatic agent, and SiO 2 as the matrix. The effects of Sn/Si molar ratio on the structure and properties of the SnO 2 -SiO 2 film prepared on quartz glass substrate with sol-gel dipping were studied. The film was analyzed by X-ray diffractometer (XRD), Fourier transform infrared (FTIR) spectroscopy and Scanning electron microscopy (SEM). Ultraviolet-Visible-Near Infrared Spectrometer (UV–VIS–NIR) and Hall effect instrument tested the photoelectric properties. Falling dust experiment was used to determine the film’s dust-removing property. The results show that the SnO 2 -SiO 2 film is composed of nano particles of SnO 2 tetragonal rutile phase and amorphous SiO 2 , and has antistatic dust-removing property. With the increase of Sn/Si molar ratio, the crystallization quality and average grain size of the film increases, while the square resistance decreases continuously. The visible transmittance fluctuates with an amplitude of no more than 1.2%, and obtained the minimum value 87.246% at Sn/Si molar ratio of 2:1. Moreover, the film’s dust-removing performance improves continuously, which obtained the best, 50%, at Sn/Si molar ratio of 2:1.
研究领域:
材料科学
·
光学工程
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2020
·
IF 2.779
Xiaoyu Sun,Xiaozhuang Xu,Guanyu Song,Jielei Tu,Lei Li,Pinyuan Yan,Weinan Zhang,Kai Hu
The broadband antireflective coatings (ARCs) can effectively reduce the optical loss in the transmittance process and improve energy efficiency in solar cells. MgF 2 /SiO 2 bilayer films were prepared on the surface of soda–lime substrates via sol – gel spin-coating combined with electron beam (e-beam) evaporation. The bottom layer was the MgF 2 film obtained from e-beam evaporation, whereas the top layer was the nanoporous SiO 2 film via sol–gel spin-coating method. The refractive indices of MgF 2 and SiO 2 layers at 550 nm are 1.38 and 1.12, respectively. The structural, morphological, and optical properties of the films were characterized. The effects of annealing temperature, Triton X-100 concentration, and spin-coating speed on the properties of the film were investigated. The transmittance spectra of the coatings were investigated, and the broadband antireflective performance of the bilayer structure was examined. A bilayer coating with optical properties close to the theoretical design results was obtained by optimizing the refractive index and the thickness of the double coatings. The solar transmittances of the soda–lime glass coated with the MgF 2 /SiO 2 bilayer antireflective film increased by 8.89% at 400–800 nm. The multilayer antireflective film exhibits promising applications in photoelectric devices, high power laser systems, and antidazzle glasses.
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 SURFACE SCIENCE
·
2022
·
IF 7.392
Tianguan Wang,Xiankang Zhong,Zhi Zhang,Xi Yuan,Li Zhou,Ziqi Zheng,Abdolreza Farhadian,Junying Hu
Asphaltene precipitation could have several negative consequences, including production decline, wellbore plugging, and even severe safety concerns. Therefore, an effective strategy of asphaltene adsorption is highly significant. Nanoparticles possess a large surface area, showing a high adsorption potential for asphaltene. However, the self-aggregation property limits its adsorption capacity. In this work, the Co 3 O 4 nanoparticles were ingeniously selected as an inhibitor of asphaltene precipitation, and a porous SiO 2 film was formed via the sol-gel method. The evaluation experiments indicated that the SiO 2 film significantly reduced the self-aggregation. Hence, the specific surface area of nanoparticles increased from 20.87 m 2 /g to 29.25 m 2 /g. Meanwhile, molecular dynamics simulations confirmed that the modified nanoparticles exhibited 1.6 times higher adsorption energy and a lower mean square displacement than the fundamental nanoparticles. With these improvements, the Co 3 O 4 -SiO 2 nanoparticles developed greater stability and dispersion, which raised the adsorption of the nanoparticles on asphaltene from 1.24 mg/m 2 to 1.53 mg/m 2 , presenting a considerable adsorption capacity. This study broadens the selection of nanoparticles for asphaltene adsorption. It demonstrates the improvement of nanoparticles by porous SiO 2 film in various aspects, which can provide a solution for inhibiting asphaltene precipitation in oil fields as well as guidance for subsequent functionalization of nanoparticles.
研究领域:
石油工程
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
·
IF 6.3
Chuanxin Yang,Ronghui Han,Xiaoyu Guo,Shufen Zhang,Bingtao Tang,Yuang Zhang
Passive radiative cooling technology has received extensive attention as an environmentally friendly cooling solution. However, existing radiative coolers often suffer from complexities in preparation and high costs, limiting their practical applications. Here, a novel porous structure with randomly distributed microspheres is fabricated in a low-cost and simple method known as solvent volatilization-induced phase separation, employing polyvinylidene fluoride (PVDF) and monodispersed SiO 2 microspheres. Utilizing the regulation of parameters such as the size of the pores and microspheres, controllable multi-scattering of light by the microstructures is achieved. The porous PVDF/SiO 2 film, with an average solar reflectance of 93.8% and an average atmospheric window emissivity of 0.958, is self-supporting and exhibits excellent flexibility and mechanical strength. When applied to closed and windowed models, the porous PVDF/SiO 2 film effectively lowers the internal temperatures by an average of 7.0 °C and 4.6 °C in summer, respectively, and by an average of 6.7 °C and 4.4 °C in spring. This work provides a viable strategy for achieving efficient radiative cooling and improving building energy management in a simple, cost-effective, and scalable manner.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2018
·Vol. 165
·期 3
·C145
·
IF 3.662
Xuehui Liu,Chuanjun Gu,Zheng Ma,Xiumin Ma,Baorong Hou
In this study, TiO2 containers with an empty core and a mesoporous shell were successfully synthesized via hydrothermal reaction. The as-prepared TiO2 was used as carrier to load the corrosion inhibitor 2-mercaptobenzimidazole (MBI). The outer shell of inhibitor-loaded containers was modified by a SiO2 film, which was obtained from hydrolysis of tetraethyl orthosilicate (TEOS) and (3-aminopropyl) triethoxysilane (APTES). The structure of the TiO2 containers was studied using X-ray diffraction (XRD) analysis, field emission scanning electron microscopy (FESEM), and Fourier transform infrared (FTIR) spectrometry. The release behavior of the corrosion inhibitor was investigated using UV-visible spectroscopy. The corrosion protection performance of the water-based epoxy coating with modified TiO2 containers was studied by using electrochemical impedance spectroscopy (EIS) and a scanning Kelvin probe (SKP). The coating with modified TiO2 containers demonstrated enhanced film barrier properties compared with blank coating. Results obtained from SKP measurements confirmed active corrosion protection performance of the studied TiO2 containers.
研究领域:
材料科学
·
腐蚀工程
·
表面化学
✓ 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）