PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Haibing Xu,Chun Yan,Xiang Chen,Dong Liu,Pengcheng Shi,Youqiang Yao,Yingdan Zhu,Junfeng Hu
The cyclomatrix-type polyphosphazene is hypothesized to have potential as optical material due to the existing of transparent P=N ring skeleton. However, as an insoluble and infusible cross-linked polymer, cyclomatrix-type polyphosphazene is very difficult to be processed into film coatings. Herein, we reported a facile in situ template method to prepare cyclomatrix-type polyphosphazene optical film coating based on in situ polymerization between chlorocyclophosphazene and 4,4’-oxydianiline. A transparent coating with smooth surface and a translucent coating with uneven surface were successfully obtained by controlling reaction time. Their molecular structures, surface morphologies and topographies, cross-section morphologies, optical properties and preparation mechanisms were studied, respectively. As expected, the novel film coatings had good transmission in the visible region, especially the smooth transparent coating, which exhibited high transmittance (80 ∼ 90%). Moreover, the coatings unexpectedly exhibited UV-shielding capacity, especially the uneven translucent coating, which blocked the vast majority of UVA radiation (78.6%) and almost all of UVB radiation (99.8%). In addition, the possible preparation mechanisms of two coatings were also discussed. The primary stage of polymerization was dominated by a film-forming process based on template self-assembly, leading to smooth transparent film coating. As polymerization progress, many cyclomatrix-type polyphosphazene microspheres were produced by a forming-microsphere process and then deposited on the film surface, forming uneven translucent coating.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xue Wang,Huanxin Guo,Zonghao Lu,Xue Liu,Xiongfei Luo,Shujun Li,Shouxin Liu,Jian Li,Yongzhen Wu,Zhijun Chen
Films with the capacity for photoluminescence and haze, which can convert UV to visible light and enhance light management, are of great importance for optoelectronic devices. Here, taking advantage of the inherent fluorescence and self-assembly properties of lignin, we have developed a sustainable lignin-derived multifunctional dopant (L-MS-NPs) for fabricating optical films with haze, fluorescence, and room-temperature phosphorescence (RTP) together with poly(vinyl alcohol) (PVA). The optical films are used to improve the light-harvesting efficiency of solar cells. Specifically, attributed to the robust morphology in the film matrix, L-MS-NPs cause a rough morphology in the surface of an L-MS-NPs/PVA composite film, which eventually triggers the great optical haze. Additionally, L-MS-NPs inherit fluorescence properties from lignin and show fluorescence emission when embed in the film matrix. Moreover, the PVA film matrix can stabilize the excited triplet state, which finally induces RTP of L-MS-NPs. The combined haze, fluorescence, and RTP properties of the L-MS-NPs/PVA composite film enhances the power conversion efficiency (PCE) of dye-sensitized solar cells from ∼3.9 to ∼4.1%.
研究领域:
材料科学
·
可再生能源
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MRS Advances
·
2019
·Vol. 4
·期 36
·1973-1979
·
IF 0
Cong Zhao,Shichao Zhao,Yuanfang Zhao,Fang He,Ripeng Luo,Jingzhou Li,Shixi Zhao,Guodan Wei,Feiyu Kang
Cesium lead iodide perovskite (CsPbI3) with excellent optical and electrical properties have attracted numerous academic attentions. Specifically, the black cubic phase CsPbI3 with a direct band gap of 1.74 eV has been most appropriate materials for various optoelectronic applications, especially for photovoltaic (PV), Light-Emitting Diodes (LED) and photodetector applications1. However, the preferred cubic phase of bulk CsPbI3 (α-CsPbI3) is usually only stable at high temperatures and it will undergo an immediate phase transformation to orthorhombic phase (δ-CsPbI3) after fabrication at room temperature. In this work, we have discovered a convenient CVD method to investigate the growth behavior of the cubic α-CsPbI3 film on the porous alumina substrate. The lead iodide and cesium iodide were used as the precursors for the deposition of CsPbI3. The porous alumina with high surface area and large pore volume was used as growth substrate. It was shown that the porous alumina promoted the growth of CsPbI3 film by absorbing the precursor and increasing the nucleation density. The prepared CsPbI3 film emitted strong and stable red light under ultraviolet light excitation at room temperature and ambient atmosphere. The lead iodide was absorbed on the surface of the porous alumina firstly then reacted with cesiumiodide to form the CsPbI3. The successful preparation of the CsPbI3 by the direct CVD method paves the way for its large scale growth and application in optoelectronic devices.
研究领域:
材料科学
·
纳米技术
·
光学工程
·
表面科学
·
无机化学
✓ 已验证
DOI
POLYMER
·
2025
·
IF 4.5
Zhengqi Tan,Xueqing Han,Wenhao Guo,Xingyue Fang,Zhouhang Lei,Jungen Chen,Liangbin Li
The quarter-wave plate (QWP), utilized in the visible range, often exhibits significant extraordinary wavelength dispersion and is essential for enhancing the imaging quality of new display devices. However, current design strategies frequently encounter limitations in physical or optical properties, restricting their application potential. We proposed a design strategy based on polyvinyl alcohol (PVA) to obtain an adjustable extraordinary wavelength dispersion materials through a simple reaction. The biphenyl side group offers orientation perpendicular to the main chain, providing suitable negative birefringence, which facilitates our design based on birefringence dispersion control (BDC) methods. We synthesized materials varying degrees of acetalization and regulated their retardation values and wavelength dispersion through uniaxial stretching the prepared films. The film with a particularly wide wavelength dispersion range in the wavelength range of 400–800 nm is obtained, which provides an excellent basis for the fabrication of wideband quarter-wave plates. We proposed a molecular design that enables wide-range wavelength dispersion regulation and investigated the contribution of stretching conditions. This provides a theoretical support and design basis for the subsequent work to prepare films close to the ideal quarter-wave plate.
研究领域:
材料科学
·
光学工程
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Yijie Zhou,Aibing Huang,Hongjie Luo,Ping Jin
Titanium nitride (TiN), as a representative refractory plasmonic material , can arouse localized surface plasmon resonance (LSPR) absorption in visible region when its size is reduced to nanometer scale with good dispersion. Herein, a citric acid assisted sol-gel method was introduced to synthesize well-defined TiN nanoparticles which were well dispersed in organic solution and further applied to prepare organic-inorganic optical foils. The color of the hybrid film was not yellow but deep blue owing to the strong absorption peak of TiN nanoparticles near 730 nm, and meanwhile TiN nanoparticles-based foils possess a strong visible covering power even superior to that of carbon black. The small, well-dispersed TiN nanoparticles dispersed in polymer foil can make the thin film high transparent and available for some optical regulation fields like automobile, architecture and other non-linear optical fields. To sum up, this study has attempted to propose a general strategy way for making transparent composite optical foils directly by embedding the multifunctional inorganic nanomaterials into organic polymer hosts.
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Yinglu Liu,Xu Wang,Bo Zhang,Yubo Zhou,Yuan Pu,Jie-Xin Wang,Dan Wang,Jian-Feng Chen
Transparent nanocomposites constructed by adding ultrasmall inorganic nanoparticles into an organic polymer matrix have been a new paradigm for preparing functional films for various optical components. Herein, aiming to avoid the negative influences of the rainbow effect on polyester film optoelectronic devices, a transparent nanocomposite of waterborne polyurethane (WPU) and ZrO2 nanoparticles is reported. The water-dispersible nanoparticles of ZrO2 modified with citric acid (CA) are first synthesized, which ensures homogeneous blending of ZrO2 nanoparticles and WPU emulsions. The ZrO2@CA nanoparticles can be well dispersed in the alkaline aqueous solution with a solid content of 5 wt %. The ZrO2/WPU hybrid films exhibit high transparency of visible light and the products of polyester-based hard coating films without rainbow effect are successfully prepared by using the ZrO2/WPU hybrid films as a functional layer for interference cancellation. This work demonstrates an efficient approach for developing water-dispersible ultrasmall ZrO2 nanoparticles and nanoparticle-derived transparent nanocomposites for advanced applications in optics.
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
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yuqian Guo,Xianhui An,Xueren Qian
Developing new materials that could identify fingerprint using the naked eye and observe the level 3 microscopic details is challenging. Here, we designed a novel hydrochromic and piezochromic dual-responsive optical film, which achieved the visual transparency transition. The performances of hydrochromic and piezochromic responses from high transparency to opaque whiteness were attributed to the introduction of poloxamer. The hygroscopic swelling of the disordered micelles led to light scattering, causing the hydrochromic response. The piezochromic response may be ascribed to the microcracks in the fragments of poloxamer crystals, which changed the refractive index of light. The fascinating combination of hydrochromic and piezochromic response was effectively applied in fingerprint identification. Hydrochromic response accurately recognized sweat pores, and piezochromic response could gradually reveal the ridges and valleys according to the different color of imprinted fingerprints. The film could identify fake fingerprints based on the differences in sweat pores between fake fingerprints and living fingers. More importantly, the film could easily detected not only the clear ridges but also the detailed sweat pores using the naked eye, indicating that the film has profound research significance in fingerprint analysis and liveness fingerprint detection.
研究领域:
材料科学
·
生物识别技术
·
光学材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2023
·
IF 17.1
Fenglian Qi,Lin Li,Zhiwei Li,Lili Qiu,Zihui Meng,Yadong Yin
Chiral plasmonic nanostructures have promising applications in optoelectronics due to their chiroptical responses. However, achieving active tuning of optical chirality remains challenging. Here, we develop stretchable chiroptical films with mechanically tunable extrinsic chirality by assembling hexagonal magnetic/plasmonic hybrid nanodisks in magnetic fields. The nanodisks, synthesized using a space-confined growth method, display three distinct plasmonic resonance modes at the UV–vis–NIR region, which red shift with increasing size as demonstrated by simulation and experimental results. The coupled magnetic and plasmonic anisotropy allows convenient control over the plasmonic resonance modes by altering the strength or direction of external magnetic fields. Further, magnetically aligning the nanodisks in a stretchable polymer film produces superstructures with extrinsic chirality, displaying selective absorption of circularly polarized light and inverted circular dichroism due to the linear dichroism-linear birefringence effect. Reversible mechanical stretching allows for continuous switching of circular dichroism in a wide range (from −1° to +1°). The efficient magnetic alignment of hybrid nanodisks in the hydrogel provides a simple and effective strategy for designing stretchable optical devices with tunable extrinsic chirality.
研究领域:
光电子学
·
材料科学
·
纳米技术
·
光子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Zhenke Fan,Yong Zheng,Yuze Du,Xi Zhang,Yuqi Huang,Yufan Li,Shiqing Yu
This study fabricated single-layer antireflective coatings (ARCs) employing a Si-Ti modified hollow silica nanoparticle (HSN) sol with self-cleaning function via in situ polymerization. Both shell-like and chain-like SiO₂–TiO₂ composites were directly synthesized in an alkali-catalyzed hollow SiO₂ sol through acid catalysis, which endowed the coating with suitable hardness while maintaining higher transmittance, thereby improving its overall performance. The influence of varying Si-Ti precursor doping ratios on the surface morphology, structure, optical performance, mechanical strength, and wettability of the coatings was investigated. The resulting coatings exhibited superhydrophilic properties, with a minimum water contact angle (WCA) below 5°. At an optimal doping concentration of 15 wt%, the coating achieved a hardness of 3 H and a solar-weighted transmittance (T sw ) exceeding 95.49 % across the wavelength range of 380–1100 nm, markedly surpassing that of the K9 glass (T sw = 91.70 %). At this doping level, the self-cleaning capability, antifogging performance, and environmental durability of the coating were further analyzed. The coating reached a self-cleaning efficiency of 95.93 % and a slight decrease of 0.03 % in T sw . After steam condensation experiment (sample placed above deionized water at 90 ℃ for 1 min), the haze value remained below 2 %. After 30 days of damp testing (80 % RH at 25 ℃), the reduction in T sw was only 0.07 %. After 100 thermal cycles (−20 ℃/30 %RH ↔ 100 ℃/30 %RH, each condition held for 30 min), T sw decreased by 0.3 %.
研究领域:
材料科学
·
纳米科技
·
表面工程
·
光学薄膜
·
功能涂层
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Yicai Wang,Junhui He
Solar energy is green and abundant, and solar cells are essential to realizing carbon neutrality. However, their power conversion efficiency (PCE) is greatly impacted by energy losses brought about by surface pollution, spectrum mismatch, and reflection. In the current work, robust liquid-like, down-shifting, and anti-reflective DSL/DT coatings were developed by a novel design for the first time. The down-shifting layer (DSL) is composed of CaMoO 4 : Eu 3 + nanocrystals, ZnO nanoparticles (ZnO NPs), and acid-catalyzed silica sol (ACSS), which can absorb and convert harmful UV energy (200–400 nm) into harvestable visible light (400–800 nm). On top of the DSL, a highly transparent liquid-repellent layer (DT) was created in situ utilizing diethoxydimethylsilane (DEDMS) and tetraethyl orthosilicate (TEOS) as precursors. The DSL/DT coating has liquid-like characteristics as a result of polydimethylsiloxane (PDMS) flexible chains that are enriched on the coating surface. A gradient refractive index is achieved by the double-layer structure, which enhances the light transmittance of coated glass (T max =91.5 %) to 94.9 % in the wavelength range of 400–1100 nm. Furthermore, the three-dimensional network formed by Si-O bonds provides significant mechanical strength, with a pencil hardness of at least 8 H and an adhesion rating of 5 A. The coating also displays UV/sunlight/chemical stability, and could withstand water falling, sand impacting and 3 M tape peeling. The DSL/DT double-layer structure successfully overcomes the limitations of current down-shifting coatings that cannot meet the comprehensive performance requirements for practical scenarios, achieving multi-function integration, high transmittance and mechanical strength and representing a notable progress in the field of down-shifting coatings, and therefore opens a new avenue to the design and fabrication of multifunctional coatings of mitigated contamination and sustained performance suitable for solar panels.
研究领域:
材料科学
·
表面工程
·
光学薄膜
·
可再生能源
·
纳米材料
·
功能涂层
·
光伏技术
✓ 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）