JOURNAL OF LUMINESCENCE
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2020
·
IF 3.28
Hui Yu,Xinan Shi,Lijian Huang,Xiaojiao Kang,Daocheng Pan
Eu 3+ /Tb 3+ -doped CaMoO 4 /SrMoO 4 luminescent thin films were deposited by a facile solution method, and were annealed over the temperature range of 350–650 °C. Luminescent thin films were characterized by means of X-ray diffraction (XRD), photoluminescence (PL), UV–vis absorption, scanning electron microscope (SEM) and energy disperse spectroscopy (EDS). In addition, the effects of alkali metal ions (Li + , Na + and K + ) on the luminescence properties of CaMoO 4 /SrMoO 4 thin films were systematically investigated. We found that the optimal chemical compositions for the luminescent molybdate thin films are Ca 0.87 MoO 4 :Eu3+ 0.10, K+ 0.03, Sr 0.82 MoO 4 :Eu3+ 0.15, K+ 0.03, Ca 0.87 MoO 4 :Tb3+ 0.03, Li+ 0.1, and Sr 0.82 MoO 4 :Tb3+ 0.15, Li+ 0.03.
研究领域:
材料科学
·
光学
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
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2020
·
IF 3.28
Diandong Xia,Jingfang Li,Weizuo Li,Lijun Jiang,Guangming Li
Multifunctional luminescent materials have attracted great attention because of their widely potential applications, however, fabrication of luminescent films are still great challenge. Herein, a new type of luminescent films have been developed by way of facile fabrication of solution casting method on the base of the reaction of hyaluronic acid (HA) with lanthanide ions (Tb 3+ and/or Eu 3+ ). The coordination interactions between HA and lanthanides were confirmed by FT-IR and XPS analysis . Luminescent spectra and luminescent decay curves supported the energy transfer from Tb 3+ to Eu 3+ ions, and the emission color of Tb-Eu co-doped films can be tuned by water molecules. Thus, HA-(Tb 0.3 Eu 0.7 ) film was applied as a self-referencing and ratiometric luminescent sensor for humidity detection , where the corresponding variable colors can be observed by the naked eyes. Moreover, the HA-(Tb 0.3 Eu 0.7 ) film for humidity sensing exhibited good reversibility and repeatability. Further, the luminescent films were applied as information carrier by using water as inks, and the writing and erasing was reversible. In addition, the luminescent films were also applied as colored coating. Therefore, this approach may provide a facile way for fabrication of luminescent films, which are of potential applications in sensing, information transmission , and colored coating.
研究领域:
材料科学
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化学
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光学
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DOI
高影响因子
LUMINESCENCE
·
2017
·Vol. 32
·期 6
·964-969
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IF 1.509
Cui Liu,Lei Du,Yongjun Lin,Jiyuan Liang,Jun'an Liu,Yuan-Cheng Cao
A quantum dot (QD) dispersant material was prepared using graphite oxide (GO). Luminescent films were prepared using polyvinyl alcohol as the polymer matrix. First, water-soluble CdTe QDs were prepared by wet chemistry and GO was synthesized using a modified Hummers method. X-Ray diffraction tests showed that the GO reflection peak [001] was 11.9°, which indicates that the d-spacing is 0.7431 nm; atomic force microscopy showed a GO thickness of 200 nm. Fourier transform infrared spectra showed vibrations at 1624 cm −1 for the carbonyl groups, and 3260 cm −1 for the GO samples; the -C–O vibration was at 1320 cm −1 and -COOH, −OH vibrations were at 950 cm −1 . Fluorescent tests showed that pH had an impact on the QD colloidal stability. GO was neutralized before use as the host media for the GO/QDs nanocomposite. The results proved that the resultant nanocomposite is promising for use in brightness enhancement films in flexible displays.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Research Express
·
2020
·Vol. 7
·期 3
·036201
·
IF 1.929
Hui Yu,Xinan Shi,Lijian Huang,Xiaojiao Kang,Daocheng Pan
A series of Eu3+ and Tb3+ co-doped CaMoO4/SrMoO4 luminescent thin films were prepared by a facile solution method, and they were annealed at 550 °C for 2 h. The luminescent properties of the thin films were studied, which involve the energy transfer from Tb3+ to Eu3+. The emission color can be changed from green to red, with increasing Eu3+ doping concentration in Tb3+-doped CaMoO4/SrMoO4 thin films. In addition, it was observed that the PL intensity of Eu3+ will enhance when Tb3+ ions are incorporated into Eu3+-doped CaMoO4/SrMoO4 thin films. The optical band gaps of the luminescent thin films are found to be in the range of 4.49 to 4.72 eV. These results revealed that Eu3+ and Tb3+ co-doped CaMoO4/SrMoO4 luminescent thin films have a significantly potential application in electroluminescent devices.
研究领域:
材料科学
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光学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2015
·Vol. 25
·期 18
·2754-2762
·
IF 11.805
Yujing Zuo,Jinfeng Cao,Shengyu Feng
The increasing pursuit of biocontained elastic materials led the investigation of the potential use of the monoterpene limonene in film synthesis via thiol–ene reaction. Poly[(mercaptopropyl)methylsiloxane] (PMMS) is first synthesized. By controlling the molar ratio of PMMS and functional monomers, such as polyethylene glycol allyl methyl ether or rhodamine-B, PMMS is partially functionalized while leaving spare mercapto groups that could be further used as cross-linking sites. On the basis of the functionalized PMMS, novel transparent silicone luminescent films with hydrophilic tunable properties are prepared by natural-sunlight-triggered thiol–ene “click” chemistry by using d -limonene as a cross-linker. Their structures and properties are thoroughly characterized. Transparent luminescent films are coated on commercially available UV-light emitting diode (LED) cell from solution medium followed by an in situ cross-linking step; a colorful LED cell is obtained through this facile and efficient method. The UV-LED coated by films show very intense photoluminescence under normal visible light or the light is on, and has very high coloric purity.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2020
·
IF 2.779
Yicheng Zeng,Biwei Qiu,FangFang Wang,Lei Zhou,Ying Li
Two kinds of hybrid luminescence films ([C 8 VIM][Eu (nta) 4 ]@PMMA and [C 8 VIM][Tb (acac) 4 ]@PMMA) have been synthesized by the copolymerization of MMA with lanthanide functionalized ionic liquid [C 8 VIM][Eu (nta) 4 ]. The structure and composition of the as-synthesized films have been characterized by 1 HNMR, XPS , FTIR, UV–vis, XRD , TGA and SEM. In addition, the photophysical properties of as-synthesized films have been investigated in detail by luminescence spectroscopy. It was found that the transparent and thermal stability of as-synthesized films are improved by the long chains of PMMA . More significantly, [C 8 VIM][Eu (nta) 4 ] @PMMA exhibits the improvement of photo physical properties (ƞ = 52.6%) and is selected as the representative sample to examine the potential fluorescence sensing of metal ions and anions. It has been showed highly selective and sensitive fluorescence sensing for Cu 2+ and CrO 4 2− . Meanwhile, [C 8 VIM][Eu (nta) 4 ]@PMMA exhibits a good stability in the aqueous solution, which is further used as fluorescence probe for detecting CO 3 2− . The good stability, sensitive fluorescence response and good mechanical processing properties of [C 8 VIM][Eu (nta) 4 ]@PMMA show a great potential to establish a fast response anion and cationic of aqueous solution fluorescence colorimetric sensor devices.
研究领域:
材料科学
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光学
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分析化学
✓ 已验证
DOI
高影响因子
APPLIED CLAY SCIENCE
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2022
·
IF 5.907
Houmei You,Kewei Zhang,Xiangkun Zhang,Huiping Ding,Yiwen Shen,Yongjun Feng,Jinpeng Hou,WeiliangTian
Quantum dots luminescent films have great potential for application in lasers, optoelectronics , solid-state light-emitting diodes, and optical devices. This work describes multilayer ordered vermiculite-based luminescent thin films (VLFs) with 2D architecture via layer-by-layer assembly of PDDA-modified CdTe QDs on exfoliated vermiculite (VMT). The assembly of negative CdTe QDs and negative VMT was achieved, overcoming the nonluminance of solid CdTe QDs. The ordered VLFs possess periodic layered structures involving heterogeneous superlattices associated with individual VMT layers. The rational combination of luminescent components affords precise control of the emission wavelength and intensity, resulting in a gradual change in luminescence intensity in the selected light-emitting spectral region upon increasing the number of deposition cycles. Compared to the CdTe QDs, the fluorescence lifetime of VLFs is improved owing to the ordered structure. This work provides a facile approach to fabricate heterogeneous VLFs with high luminous properties and optical stability, which is expected to prevent easy aggregation of luminescent materials and can be potentially applied in light displays and multicolor optical and optoelectronic devices .
研究领域:
材料科学
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光电子学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Houmei You,Jinpeng Hou,Yiwen Shen,Xiangkun Zhang,Jiaxue Cai,Yaya Zhang,Yongjun Feng,Weiliang Tian,Kewei Zhang
Solid-state light-emitting devices are of special interest in optoelectronic applications, owing to inherent advantages in terms of low cost, high efficiency and desirable durability. However, the accumulation of solid fluorescent chromophores causes serious energy transfer, resulting in fluorescence quenching. Herein, exfoliated vermiculite (VMT) was structurally disassembled into Mg-O octahedral and Si-O tetrahedral layers to produce hydrotalcite (LDHs) and SiO 2 , respectively, realizing efficient utilization of each component and VMT surface. The fluorescent intercalated LDHs was intercalated with organic fluorescent dyes, including rhodamine 6G (R6G), pyronine G (PG) and sodium fluorescein (Fl-Na), to prepare high-performance fluorescent LDHs, which was further assembled with VMT nanosheets to form ultrathin solid-state light-emitting films. Based on the electrostatic self-assembly strategy, the localization of chromophores and light-emitting intensity of solid films can be precisely controlled by adjusting ordered multilayers. In fact, the exfoliated VMT could cause the quenching of organic fluorescent dyes in liquid, therefore VMT can be used as fluorescent quencher, which could be regenerated by heating. The designed assembly strategy avoids the fluorescence quenching of VMT. Without the addition of any surfactant, both anionic and cationic organic fluorescent dye can be intercalated into hydrotalcite, overcoming the disadvantage of LDHs that can only intercalate anionic molecules. In particular, the VMT encapsulation overcomes the quenching problem of fluorescent dye and improves the stability of the light-emitting films. This work provides a potential strategy for assembling solid-state light-emitting films and opens new applications in various optoelectronics, such as surface-emitting light source and full-color flat-panel displays.
研究领域:
材料科学
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光学
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产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
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2020
·
IF 7.182
Haiping Wang,Yujia Pei,Xueren Qian,Xianhui An
Metal-organic frameworks (MOFs) are emerging highly crystallized three-dimensional network complex formed by self-assembling metal ions and organic ligands. However, all MOFs are nanoscale and micro scale powder materials, which greatly impedes their further applications. In this study, a transparent Eu-MOF@TEMPO-oxidized cellulose nanofibrils (Eu-MOF@TOCNF) photoluminescence material for specifically detecting copper ions was fabricated via in-situ synthesis in hydroalcoholic medium. Scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, Fluorescence spectrometer and other equipment were applied to characterize functionalized TOCNF film samples, and the results confirmed the successful fabrication of the functionalized TOCNF film with stable fluorescence properties. The film performed a high selectivity toward copper ion in the presence of other interfering metal ions. The fluorescence intensity of the film decreased gradually with the increase of copper ion concentration, and I 0 / I -1 developed a good linear relationship with [Cu 2+ ], which made the film a promising material for detecting Cu 2+ in water body.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 33
·11924-11930
·
IF 8.067
Yuan Wang,Guangmin Xie,Jinglei Chen,Xiurong Zhang,Cong Chen,Jian Yin,Huanrong Li
Visible light as an excitation source is much more accessible than ultraviolet light, but the synthesis of lanthanide complex (LnC) films with visible-light excitation and high photoluminescence quantum yield (PLQY) is still a challenge. We report herein a visible light excitable and highly luminescent film by incorporation of a europium(III) (Eu3+) tetrakis(β-diketonate) complex with tetraphenylphosphonium as a counterion into a polymethyl methacrylate (PMMA) matrix. Excellent compatibility between the complex and PMMA was observed, resulting in the PMMA film with an 80 wt% loading content of the complex exhibiting a PLQY of up to 62.5% and a high transparency of ∼89%. As a proof-of-concept experiment, the luminescent film was used to fabricate luminescent solar concentrators (LSCs), in which the strong luminescence effect of the luminescent film is responsible for its optical conversion efficiency of 1.46% with a G of 1.87. This study presents a new model system for the development of highly transparent LSCs by utilizing high loading contents of LnCs.
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 ALLOYS AND COMPOUNDS
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2024
·
IF 5.8
Cong Xie,Xiao Zhang,Wenbin Shi,Ping Yang
The poor stability of perovskite nanomaterials exposed in high temperature, moisture, light radiation, and polar solvent conditions severely restrict their commercial application. To address this issue, the growth in situ of CsPbX 3 (X = Cl, Br, I) nanocrystals (NCs) is carried out by using the stable aluminum (Al)-based metal-organic frameworks to create CsPbX 3 @MIL-53(Al) composites. Compared with pristine CsPbX 3 NCs prepared using room temperature ligand assisted re-precipitation synthesis, the CsPbX 3 @MIL-53(Al) composites exhibit narrow photoluminescence (PL) spectra and greatly improved stability. The green emitting CsPbBr 3 @MIL-53(Al) composite exhibit narrowed PL spectrum (the full width at half-maximum of PL spectra: 20 nm for the composite and 28 nm for CsPbBr 3 NCs) and a blue-shifted PL peak wavelength (517.6 nm for the composite and 527.6 nm for the CsPbBr 3 NCs). The relationship of microstructure, components, PL, fluorescence lifetime, and stability are discussed systematically. Anomalous stability against heat-treatment, polar solvent and humidity conditions indicated the composites retained their initial PL intensity after storge more than 4 months in ambient conditions and heat-treated to 120ºC for 5 cycles. The emitting color of CsPbBr 3 @MIL-53(Al) composites are easily adjusted from blue, green to red by controlling the halide components of precursors. The composite was used to create emitting coating and highly bright flexible emitting films which also reveal high stability, suggesting that in situ encapsulation of CsPbX 3 NCs in MIL-53(Al) would supply a novel platform for various emitting devices.
研究领域:
材料科学
·
纳米技术
·
光电技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Cong Ma,Meiyun Zhang,Jialong Xing,Baolong Yuan,Hao Sun,Dexian Ji,Jingru Zhang
Metal halide perovskite quantum dots (QDs) film shows significant potential in flexible optoelectronics, including applications in lighting, displays, wearable devices and non-planar X-ray imaging. However, developing highly luminescent, durable, and mechanical flexible film for practical use remains a challenge. In this study, we introduce a low-cost, environmentally friendly, biomass material - mixed cellulose esters (MCE) - as a novel encapsulation matrix. The CsPbBr 3 @MCE composite luminescent film was fabricated using a simple in-situ growth strategy, ensuring uniform distribution of QDs within the matrix. The chemical bond anchoring between MCE and CsPbBr 3 QDs, combined with the effective isolation provided by in-situ encapsulation, resulted in exceptional luminescence properties, including a high photoluminescence quantum yield (PLQY = 67.73 %) and excellent color purity. Additionally, the film demonstrated enhanced stability against environmental, thermal, ultraviolet, and high-humidity stresses, thanks to the protective encapsulation of MCE. It also exhibited remarkable mechanical flexibility, transparency, the capability for large-area production. These findings suggest that the CsPbBr 3 @MCE composite holds great promise for various applications, including light-emitting diodes, flexible pattern display, hazardous chemical identification, information encryption, and anti-counterfeiting technologies.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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