CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Lijian Sun,Jingyuan Zhang,Ying Qin,Weimin Guo,Kuo Zhang,Jiang Chang,Tianyuan Xiao,Wei Wang,Qiu Fu
Color conversion, long-wavelength light emission by absorbing short wavelength light using color conversion materials, is not only the basis for successful operation of many contemporary display and lighting technologies, but also the most effective strategy for shielding harmful UV and blue light. However, high cost and complicated processing inevitably hinder the development of color conversion materials. Inspired by FeCl 3 solution, color-conversion cellulose films with low haze and high transparency were successfully prepared by the coordination and stacking of Fe 3+ . For the first time, it was found that when the coordinated Fe 3+ forms a stacked layer, the film blocks the entire UV and high-energy blue light (HEBL) region (400–450 nm), and the absorbed UV and HEBL is converted into low energy (long wavelength) light in the yellow and green regions. The films also demonstrate efficient blue light conversion and allows other light in the visible region to enter smoothly. The light conversion performance of the films is substantiated through their application on blue-, green-, and red-LEDs. By means of light absorption and conversion, the films are capable of efficiently screening blue light emitted by WLEDs in lighting systems, video game console screen, computer screen, and mobile phone screen, as well as UV radiation from the sun. Encouragingly, the incorporation of Fe 3+ enables films to achieve an exceptional flame-retardant feature. These films as color conversion materials will have wide applicability in eye protection and flexible photoelectric devices due to their exceptional combination performance and are highly suitable for large-scale continuous production.
研究领域:
材料科学
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光学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Xiaojin Liu,Ting Li,Chenxi Hu,Yang Wang,Guanglong Li,Weifu Dong,Jinliang Qiao
Overexposure to ultraviolet (UV) light can pose a threat to human health and lead to the photodegradation of organic materials, thereby there is great interest in the development of UV-shielding and UV-to-visible light converting materials. In this study, a novel polymer microsphere with both UV-shielding and blue-light-emitting characteristics was fabricated by grafting disodium 4,4′-bis[(4-anilino-6-hydroxyethylamino-1,3,5-triazin-2-yl) amino] stilbene-2,2′-disulphonate (VBL) onto poly (maleic anhydride-co-α-methyl styrene) (PMAS) microspheres via an esterification reaction. The as-prepared PMAS-VBL microspheres were then incorporated into polyvinyl alcohol (PVA) to prepare composite films . The introduction of PMAS-VBL endowed PVA with excellent UV-shielding and fluorescent properties, which are mainly derived from the UV-to-blue light converting ability of VBL. PVA films containing 7 wt% PMAS-VBL microspheres can block almost 100% UV light while the visible light transmittance was maintained at 66.9% and the absolute quantum yield of the films reached up to 74.26%. This work opens up a new pathway for fabricating UV filters and blue light converters, which are very promising for a diversity of UV-shielding and fluorescence-based applications.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·Vol. 46
·期 13
·21560-21568
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IF 3.83
Mingcai Li,Xuejie Zhang,Yinjian Zheng,Yaliang Xu,Haoran Zhang,Yingliang Liu,Bingfu Lei
The discovery of light converter excited by near-ultraviolet (UV) superior broadband blue-emitting lighting source is a main challenge in plant growth LEDs. In this study, SrLu 2 O 4 :Ce 3+ , Li + , F − blue phosphor has been synthesized via a solid-state reaction. Benefitting from doping of F − ions, SrLu 2 O 4 :Ce 3+ , Li + , F − phosphor (λ ex = 405 nm, λ em = 460 nm) shows a strong broadband (FWHM = 90 nm) blue-emitting with lower critical concentration of Ce 3+ ions and an increasing 6.9% thermal quenching performance (92.1% @ 423 K of the peak intensity at room temperature). Moreover, a blue light converter composed of SrLu 2 O 4 :Ce 3+ , Li + , F − phosphor and glass matrix is obtained based on phosphor-in-glass (PiG) technology, exhibiting excellent thermal stability and outstanding moisture resistance . A red light converter with commercial red phosphor is obtained by the same method. Furthermore, by combining of two light converters with near-UV chip, a proof-of-concept plant growth high power LED is achieved and applied in indoor Italian lettuce growing in comparison with commercial plant lamps.
研究领域:
材料科学
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光学工程
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农业光电子学
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固体发光
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无机非金属材料
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2019
·Vol. 30
·期 15
·155601
·
IF 3.399
Guangqi Hu,Yuqiong Sun,Shuangshuang Wu,Wei Li,Chaofan Hu,Jianle Zhuang,Xuejie Zhang,Bingfu Lei,Yingliang Liu
The shell/core structure of CDs@CaF2 nanocomposites (CCNCs) were prepared by assembling fluorescent carbon dots (CDs) inside the inorganic CaF2 substrates using co-precipitation interaction. CDs endow CaF2 with properties of good UV-absorbing behavior and efficient blue light emission instead of rare-earth such as Eu that is expensive and susceptible to polluting the environment during the mining process. Due to the nanometer size and surface effect of nano CaF2, and the approximate refractive index between CaF2 and polyethylene (PE), CCNC/PE film exhibits better elongation at the break than pure PE film while maintaining high transparency and visible light transmittance. Simultaneously, the CCNC/PE film was experimentally demonstrated to have outstanding performance of anti-UV and blue light conversion, which shows that CCNCs can be a novel and promising multifunctional additive applied in polymers especially for greenhouse film.
研究领域:
材料科学
·
纳米技术
·
聚合物科学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Kuibao Yu,Hailong Hu,Yuan Qie,Chao Zhong,Zhihan Lin,Tian Liu,Fushan Li
Near infrared (NIR)-to-visible up-conversion devices (UCDs) offer significant advantages in pixelless bio-imaging and monitoring. Herein, a flexible NIR-to-blue quantum dot (QD) UCD is developed by directly stacking an organic bulk-heterojunction (BHJ) photodetector unit with an environmentally-friendly ZnSe/ZnS QD light-emitting unit in tandem. Aiming at the interconnection layer (ICL) that couples these two units, an Mg-doped ZnO ICL is rationally designed to achieve high conductivity and a low work function, facilitating the rapid transport of photo-generated electrons and their efficient injection into the QD emitting layer. Importantly, Mg-passivated ICL with fewer surface defects alleviates the exciton quenching at the QD/ICL interface and suppresses the undesired charge recombination at the ICL/BHJ interface. The resultant QD-UCDs enable a high photon-to-photon conversion efficiency (? P-P ) of 8.68%, which is ≈3 times higher than that with un-doped ICLs (2.91%). The flexible QD-UCDs can readily measure human heart rate and provide high-contrast microscopic imaging of various biological tissues.
研究领域:
生物医学工程
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纳米医学
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光学成像
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柔性电子学
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转化医学
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生物传感器
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）