OPTICAL MATERIALS
·
2014
·
IF 2.075
Quntao Tang,Honglie Shen,Jing Jiao,Weilong Chen
ZnO:Er, Li light conversion film has been successfully fabricated by sol–gel method. XRD measurement demonstrated the successful incorporation of Er 3+ and Li + into ZnO films. The as-grown film co-doped with 2% Er 3+ and 3% Li + is featured with a transmittance of about 86.8% in the range of 400–900 nm. Moreover, the film exhibits a visible light emission either being excited by 355 nm or 980 nm. Due to its relatively high transmittance characteristics and promising properties of converting both UV and NIR light to visible light, the developed film is considered to have a potential application in novel light conversion devices including solar cells.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2020
·Vol. 13
·期 1
·113
·
IF 3.426
Zhihui Zhang,Zhengdong Zhao,Yujia Lu,Di Wang,Chengyu Wang,Jian Li
A CA-Eu(III) complex was synthesized by the coordination reaction of cellulose acetate (CA) and Eu3+to obtain a CA-Eu light conversion film. This product was then doped with Tb(III) to sensitize the luminescence of Eu3+, which could functionalize the CA film. FTIR and XPS showed that the oxygen atoms in C=O, C–O (O=C–O), and O–H were involved in the complexation with Eu3+and formed a Eu–O bond. SEM revealed that Eu3+filled in the pores of the CA film. By changing the experimental conditions, the best fluorescence performance was obtained at the CA: Eu3+ratio of 3:1 with a reaction time of 65 min. The energy transfer between Tb3+–Eu3+could be realized by doping Tb3+to enhance the luminescence of Eu3+. The best fluorescence performance of the CA-Eu-Tb light conversion film was at a Eu3+:Tb3+ratio of 3:1. Compared with the CA film, the light conversion film has high transparency, high tensile strength, and good flexibility. It can convert the ultraviolet light harmful to plants into red light that is beneficial to photosynthesis. This offers high efficiency and environmental protection in the field of agricultural films.Keywords:light conversion film;cellulose acetate;europium;sensitization
研究领域:
材料科学
·
农业科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2012
·
IF 2.159
Yan-Jing Gu,Bing Yan,Xiao-Fei Qiao
Novel rare earth complex-functionalized mesoporous SBA-16-type hybrid materials are synthesized by the co-condensation of modified 2-methyl-9-hydroxyphenalenone (MHPOSi), from modified 3-(triethoxysilyl)-propyl isocyanate (TEPIC), and tetraethoxysilane (TEOS) in the presence of Pluronic F127 as a template. These inorganic–organic mesoporous hybrids are characterized by FT-IR spectra, small-angle X-ray diffraction (SAXRD), N 2 adsorption–desorption measurements, thermal analysis and spectroscopy. Their photophysical properties, which show novel light conversion properties, are discussed in detail. The Eu 3+ hybrid system shows ultraviolet excitation and visible emission, and the Nd + and Yb 3+ hybrids exhibit visible excitation and NIR emission.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 23
·7611-7618
·
IF 6.4
Xiaoxuan Guo,Bomei Liu,Rongyi Kuang,Weijiang Gan,Lin Huang,Jing Wang
Cr-activated phosphor-converted light sources have attracted widespread attention in various applications based on near-infrared (NIR) spectroscopy. Unfortunately, Cr ions usually face the issue of multivalence and typically exist in the valence of +3, which gives the emission mainly at NIR-I (700–1000 nm) and greatly limits its potential application. In this study, we propose the control strategies of site occupancy confinement and sintering atmosphere to synthesize Cr4+-activated Li2SrGeO4 (LSGO:Cr4+) phosphors. Interestingly, the as-optimized LSGO:Cr4+ achieves a NIR broadband emission peak at 1170 nm with an FWHM of 208 nm upon excitation at 680 nm and exhibits excellent thermal stability and high efficiency with the external quantum efficiency of 30.0%. Furthermore, the as-fabricated LSGO:Cr NIR phosphor-converted light emitting diode (NIR pc-LED) device shows a high power of up to 69.1 mW at 550 mA. Furthermore, as NIR-II (1000–1700 nm) light source, the phosphor successfully distinguishes deuterium and non-deuterium reagents. For example, the quantitative detection of H2O in heavy water (D2O) is demonstrated by NIR spectroscopy with a limit of detection (LOD) of 0.47 vol%. Our findings will open up a new avenue to develop novel Cr4+-activated NIR-II phosphors and NIR-II light sources.
研究领域:
材料科学
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光学工程
·
分析化学
✓ 已验证
DOI
高影响因子
OPTICAL ENGINEERING
·
2025
·
IF 1.2
Xianzhen Huang,Yun Ye,Jiaqi Gao,Xingke Zheng
Color conversion layers are extensively utilized in flat panel display technology for their capacity to provide a wide color gamut and improved resolution, along with exceptional design flexibility. The uniformity and thickness of cadmium selenide (CdSe) quantum dot (QD) films are often difficult to control in the preparation of color conversion layers. Interestingly, it is possible to precisely deposit QDs by inkjet printing to improve material utilization. Color conversion layers with optimized spectral properties and light conversion efficiency are successfully prepared by inkjet printing. We employ inkjet printing technology to fabricate CdSe QD color conversion layers with precise control over layer thickness. The effects of layer thickness on spectral properties and light conversion efficiency are systematically investigated. It is found that a layer thickness of 5.5 μm achieves the highest light conversion efficiency at 20.4%, with efficiency decreasing as thickness increases to 6 μm. In addition, it is observed that blue light transmittance decreases from 47.2% to 11.4% with increasing layer thickness, highlighting the importance of thickness control in optimizing spectral properties.
研究领域:
材料科学
·
显示技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2025
·
IF 14.3
Yanrong Liang,Xiangjia Sun,Tongtong Zhu,Haitao Wang,Shuo Wang,Xiaojuan Liang,Weidong Xiang,Weiwei Huan,Jie Li,Junlong Wang
In recent years, the development of solid-state lighting devices has increasingly shifted towards high-power laser illumination, making it imperative to develop fluorescent conversion materials with exceptional thermal stability and luminous quality. In this study, we introduced a highly reflective TiO 2 substrate in combination with a high thermal conductivity AlN substrate to design a Ce:YAG-PiG-TiO 2 -AlN Film (Ce:YAG PTAF) color converter with outstanding photothermal performance. Remarkably, the thermal conductivity of this material reaches 48.28 W m −1 K −1 . Notably, the optimized PTAF can withstand a high-power output of up to 12.14 W in a static environment, with a maximum luminous flux (LF max ) of 2284.6 lm and maximum luminous efficacy (LE max ) of 222.35 lm W −1 , showcasing its excellent optical properties. Furthermore, the fabricated Ce:YAG-PiG-TiO 2 -AlN-Wheel (Ce:YAG PTAW), equipped with a motor operating at 7200 r/min, emits an extraordinary brightness of 4404 lm under 88 W of ultra-high laser irradiation, with stability surpassing that of commercial silicone color wheels, thanks to its superior Li 2 O-Al 2 O 3 -SiO 2 (LAS) glass system. Interestingly, we designed an innovative spatially separated two-color segmented wheel structure, effectively mitigating the photon reabsorption phenomenon caused by the overlap of the fluorescent powder absorption peaks. When the ratio of Ce:YAG to Ce:GdYAG is 240:120, it yields white light with a color rendering index (CRI) of 80.2, and luminous flux remaining at 3317.8 lm. When encapsulated in a reflective module, it accurately reflects the true color states of objects. These results collectively indicate that both Ce:YAG PTAF and PTAW possess significant application potential in the realm of high-power laser illumination.
研究领域:
光学材料
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固态照明
·
热管理技术
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2016
·
IF 2.183
Jiangling He,Youling He,Jianle Zhuang,Haoran Zhang,Bingfu Lei,Yingliang Liu
In this work, blue-light-emitting carbon dots (CDs) were composited with red-light-emitting europium ions (Eu 3+ ) solutions under the synergistic reaction of polyvinyl alcohol (PVA) to prepare the light conversion film. The formation mechanism of Eu 3+ /CDs/PVA film was detailedly discussed. It is the first report that this composite was synthesized through direct recombination of CDs and Eu 3+ solutions instead of traditional methods based on Eu 3+ coordination compound. Furthermore, tunable photoluminescence property can be successfully achieved by controlling the ratio of CDs to doped Eu 3+ , this property can meet the variable light component requirements for different species of plants.
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
ACS Applied Nano Materials
·
2022
·
IF 6.14
Ying Li,Rong Song,Jiaming Liu,Jun Qian,Xin Wang
Inorganic perovskites show excellent advantages over traditional quantum dots (QDs) and have great potential for application in light-emitting devices, display devices, and other fields. In this paper, CsPbBr3/Cs4PbBr6 QDs with different cesium-to-lead ratios are synthesized in one step at room temperature and in a simple environment without protective measures. Among them, the perovskite powder with a photoluminescence quantum yield (PLQY) of 54% and a series of ink additives are formulated into a perovskite fluorescent ink with high stability and printability. The inks are used not only for printing but also for writing with simple and convenient application conditions in mass production. Finally, the inks are used to combine ZnS:Cu flexible alternative current electroluminescent (ACEL) devices to produce two different structures of light conversion flexible ACEL devices in a full-printing manner. The material loss and cost of the devices are very low. Pattern drawing and printing can be performed selectively. Among them, the P-outside structure ACEL device has a high lumen efficiency of 77.43 lm/W, which shows the application potential of the ink in ACEL devices and promotes the process of perovskite materials from laboratory to industrial applications.
研究领域:
材料科学
·
光电设备
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2025
·
IF 7.2
Xiulan Shui,Shuangqiang Fang,BenLe Dou,Tianchun Lang,Haoliang Cheng,Jiaqi Ou,Zhou Zhou,Xuan Liu,Le Wang
Development of efficient sunlight conversion materials is critical for advancing sustainable agricultural practices, but current solutions often face challenges such as poor stability, high cost, and reliance on rare-earth elements. This study presents a rare-earth-free xCsMnCl 3 (H 2 O) 2 /(1−x)Cs 3 SbCl 6 heterojunction ( x = 1−0.65) synthesized via an eco-friendly mechanochemical method. By strategically combining Cs 3 SbCl 6 as a UV-absorbing donor with CsMnCl 3 (H 2 O) 2 as an efficient red emitter. The optimized heterojunction achieves a remarkable 36-fold enhancement at 626 nm (Full width at half maxima (FWHM) = 88 nm), perfectly matching chlorophyll a's absorption spectrum. Comprehensive experimental and theoretical analyses, including UV–vis absorption, photoluminescence (PL) spectroscopy, and density functional theory (DFT) calculations, reveal a dual enhancement mechanism: i) efficient interfacial electron-hole transfer and ii) suppression of non-radiative recombination through defect passivation. The practical application is demonstrated through a sunlight conversion film fabricated by embedding the 0.75CsMnCl 3 (H 2 O) 2 /0.25Cs 3 SbCl 6 composite in Ecoflex-0030, which exhibits exceptional environmental stability (90% PL retention after 90 days) and mechanical durability (500% tensile strain). The plant growth experiments confirm the film's agricultural efficacy, with chives and green cabbage growth rates increasing by 1.5- and 1.3-fold, respectively, compared to natural light conditions. This work not only addresses the limitations of existing light-conversion materials but also establishes a rare-earth-free, eco-friendly platform for energy-efficient agriculture.
研究领域:
材料科学
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农业科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS-CONDENSED MATTER
·
2022
·Vol. 34
·期 15
·154001
·
IF 2.745
Chunli Jiang,Qianqian Luo,Chunhua Luo,Hechun Lin,Hui Peng
We report here the synthesis of hybrid manganese halide crystals, (C4H7N2)MnCl3 · H2O and (C4H7N2)2MnCl4, by using the same organic ligand 2-methylimidazole. Upon heating treatment, the red-emissive (C4H7N2)MnCl3 · H2O crystal is structurally transformed into green-emissive (C4H7N2)2MnCl4 crystal in situ. The crystal structural analysis reveals that the [MnCl5 · H2O]3− octahedra chains decompose into mono [MnCl4]2− tetrahedra, accompanied by the departure of H2O molecules. Upon cooling in air or water vapor, the crystal structure and luminescence of (C4H7N2)2MnCl4 are transformed to those of (C4H7N2)MnCl3 · H2O. The in situ conversion of luminescence between (C4H7N2)MnCl3 · H2O and (C4H7N2)2MnCl4 provides new insight into the potential application of hybrid manganese halides.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Tong Feng,Yuanlin Jin,Zhangwen Long,Dacheng Zhou,Xiaqing Jiang,Bitao Liu,Jianbei Qiu
Phosphor conversion light-emitting diode (PC-LED) technology has become a focal point of research for portable near-infrared light sources in recent years. One of the crucial aspects is to develop phosphor materials that can be effectively stimulated by commercial available blue light. Unfortunately, efficient phosphors in the NIR-II that can be excited by commercial blue light are particularly scarce. In this study, Mg 4 Ta 2 O 9 :0.04Cr 3+ ,0.03Yb 3+ ,0.07Li + (MTO:0.04Cr 3+ ,0.03Yb 3+ ,0.07Li + ) phosphor was synthesized using the high temperature solid phase method, and its emission spectrum covered the first and second near-infrared windows (700–1200 nm). The internal quantum efficiency (IQE) and external quantum efficiency (EQE) are 88.7 % and 45.6 %, respectively, due to the synergistic effect of energy transfer and Li-ion modification. Additionally, the doping of Yb 3+ ions and Li + ions enhances the thermal stability of luminescence. The thermal stability of MTO:0.04Cr 3+ ,0.03Yb 3+ ,0.07Li + and MTO:0.04Cr 3+ ,0.03Yb 3+ is 9.81 % and 14.43 % higher, respectively, than that of MTO:0.04Cr 3+ ,0.03Yb 3+ and MTO:0.04Cr 3+ . To evaluate its potential applications, we developed a prototype PC-LED utilizing MTO:0.04Cr 3+ ,0.03Yb 3+ ,0.07Li + phosphor as an emission emitter which demonstrated advantages in biomedical imaging, night vision, and non-destructive testing.
研究领域:
材料科学
·
光学工程
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2023
·
IF 10.9
Xiao Gong,Qingqing Xu,Xiaona Chen,Fanchao Meng,Hangxiang Wang
In this age of technology, people are inevitably surrounded by electronic devices and light-emitting devices, but the radiation generated by these devices is very harmful to humans. Therefore, it is crucial to develop a stable absorbing material with efficient absorption capacity for UV and high-energy blue light (HEBL). In this paper, we report that carbon nanodots (CDs) with strong absorption peaks in the UV and HEBL can be rapidly synthesized in large scale by simply heating urea and citric acid at high temperature under atmospheric pressure without using any solvents. Interestingly, the large-scale prepared CDs possess green fluorescence emission upon excitation in both the UV and HEBL regions, exhibiting good photoconversion ability. Furthermore, ultrahigh efficient UV and HEBL shielding films can be prepared by embedding the CDs in a carboxymethyl cellulose matrix. By characterizing their transmission and absorption spectra , it can be found that the cellulose films containing 0.2 wt% CDs achieve almost complete shielding of UV-A, UV-B, and HEBL with a guaranteed visible light (550 nm) transmission rate of 80% or above. Finally, this cellulose film was further attached to a light-emitting diode (LED) chip to investigate its practical use in the field of UV and strong blue light shielding.
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
危险品化学品经营许可证（带存储）