MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2024
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IF 4.2
Wanjiang Jin,Xinyu Tan,Qihao Dai,Tao Li,Lihua Jiang,Ting Xiao,Weifeng Chen
Transparent self-cleaning coatings have garnered significant attention for their promising prospects in outdoor applications, particularly in solar panels and high-end optical devices. However, existing technologies still grapple with the challenges of achieving high transmittance and superior weather resistance. Therefore, developing cost-effective coatings that possess both high transparency and excellent durability is paramount. A novel method for synthesizing an anti-reflective (AR) coating is presented in this paper, offering simplicity, cost-efficiency, and high performance. By merging acid-base catalyzed sol-gel chemistry with the dip-coating process, the coating's transparency, durability, and hydrophobicity are notably improved. Production time is significantly reduced through process optimization. The AR coating achieves an exceptional transmittance of 97.3 % at 620 nm, a 6.7 % increase over that of untreated glass. Furthermore, its 145° water contact angle demonstrates excellent hydrophobicity and self-cleaning properties. Mechanical stability tests indicate that the coating retains over 96 % transmittance even after 30 tape adhesion cycles. Long-term UV exposure tests reveal that the coating's transmittance and contact angle remain almost unchanged, underscoring its superior environmental stability and weather resistance. Additionally, the coating enhances the transmittance of multi-crystalline silicon (mc-Si) solar cells compared to commercial glass, boosting the photovoltaic conversion efficiency from 11.04 % to 11.81 %, an increase of 7 %. With these exceptional properties, this coating holds significant potential for applications in mc-Si solar cells and high-end optical devices, providing the industry with an efficient and economical solution.
研究领域:
材料科学
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可再生能源
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Xinqi Chen,Wenjing Lv,Zhili Shi,Pujia Cheng,Kaidong Zhan,Yaqi Liu,Fan Wu,Quinn Qiao
The photovoltaic conversion of heterojunction solar cells relies on the interface properties between n-type and p-type semiconductors. N-type TiO 2 -nanoarray (NA), ferroelectric BiFeO 3 interlayer, and p-type BiOI were used to fabricate a ternary bulk heterojunction using a solution-based method in this study. Solid-state solar cells of FTO/TiO 2 -NA/BiFeO 3 /BiOI/spiro-OMeTAD/Ag are constructed for the first time, and their photo-electric conversion performance is studied. The addition of a BiFeO 3 interlayer at the interface between TiO 2 -NA and BiOI increased the solar cell open-circuit voltage ( V oc ) from 0.18 to 0.47 V and the short-circuit current ( J sc ) from 0.29 to 0.54 μA/cm 2 , resulting in a nearly 5-fold increase in power conversion efficiency. The Kelvin Probe force microscope analysis confirmed that the polarization electric-field ( E self ) generated by the BiFeO 3 interlayer is directed toward BiOI, thereby increasing the surface potential and decreasing electron and hole back flows between TiO 2 and BiOI. This additional electric field caused greater charge concentrations and a greater V oc . Furthermore, the E self directed toward the BiOI increased the built-in electric field ( E bi ) in the space charge area from TiO 2 to BiOI, allowing for greater separation of photogenerated electrons and holes and thus raising the J sc . The findings of this study suggested that manipulating internal electric fields via polarization could be an effective method for enhancing the performance of solar cells based on BiOI.
研究领域:
材料科学
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光伏技术
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纳米技术
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能源材料
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
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2022
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IF 6.959
Xinyang Liu,Zhu Mao,Jing Liu,Fanxu Meng,Xiumin Shi,Xiangxin Xue,Bing Zhao
Photoelectric conversion efficiency is primarily determined by the carrier transport path of the dye-sensitized solar cell (DSSC) interface. While open-circuit voltage (VOC) is one of the important performance parameters in DSSCs, a deeper understanding of its correlation with the photogenerated carrier transport at the photoanode interface has always been a major challenge for researchers. Here, we propose an in situ Raman spectroscopy strategy for synchronously monitoring the VOC value of DSSCs to investigate the photoanode operation mechanisms by revealing electrolyte species and dye evolution at the photoanode/electrolyte interface. TiO2 nanoparticles are modified on TiO2 nanotube array surfaces to improve the specific surface area of dye sensitization and, thus, regulate the VOC of DSSCs. The results confirm that fluctuations in the Raman spectral intensities of polyiodide formed at the photoanode/electrolyte interface during photosensitization are highly correlated with the VOC value. Furthermore, direct spectroscopic evidence also revealed that pentaiodide is spontaneously and reversibly regenerated under DSSC operating conditions. Finally, a semiquantitative method for measuring VOC of DSSCs using Raman spectroscopy is established. This study represents that in situ Raman spectroscopy can be used as an effective platform for precisely revealing the optimization mechanism of VOC in real-time, thereby providing evidence at the molecular level for improving the photovoltaic conversion performance of DSSCs.
研究领域:
材料科学
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物理化学
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可再生能源
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光谱学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Chenggang Li,Guohua Chang,Shilian Wu,Tong Yang,Bingjian Zhou,Jingxian Tang,Linzhuo Liu,Runze Guan,Guijun Zhang,Juan Wang,Yu Yang
Superhydrophobic coatings with unique self-cleaning phenomenon and have been studied in the fields of photovoltaics, concrete, windows, vehicle housings, and so on. However, obtaining self-cleaning coatings with excellent performance through a simple process and at a low cost is a difficult challenge. In this study, a simple dip-coating process was used to prepare a highly transparent superhydrophobic self-cleaning coating, with a bilayer structure consisting of a hexamethyldisilazane-modified silica antireflective buffer layer and an epoxy-modified silicone/fumed silica superhydrophobic surface layer. Due to the addition of the buffer layer, the structure of the coated surface is more regular, resulting in the coated glass having a transmittance 4.3 % higher than the bare glass and achieving a static water contact angle of 155.1° and a sliding angle of 0.1°, demonstrating excellent self-cleaning performance. The cross-linking curing of the silicone resin allows the coating to demonstrate stability in a variety of extreme environments. Therefore, the use of coated glass to encapsulate photovoltaic cells resulted in a significant increase in photovoltaic conversion efficiency, and the cell performance remained unchanged after contamination and self-cleaning procedures. This low-cost strategy is expected to increase photovoltaic cell power generation and address the problem of degraded device performance due to surface contamination.
研究领域:
材料科学
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光伏技术
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表面化学
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涂层技术
✓ 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）