RSC Advances
·
2019
·Vol. 9
·期 3
·1270-1277
·
IF 3.049
Yufeng Zhang,Jie Xiong,Dingyi Shen,Wenpeng Xia,Jie Yu,Yanfei Zhang,Jun Yang,Shanshan Hu,Yuxin Wan,Haili Wen,Hang Ye,Yucan Liu
A series of color-tunable emitting Na3Sc2(PO4)3:Ce3+/Tb3+/Eu3+ (NSPO) phosphors were prepared by a combination of hydrothermal synthesis and low temperature calcination. The phase structure, photoluminescence and energy transfer properties of the samples were studied in detail. The tunable colors were obtained by co-doping the Tb3+ ions into the NSPO:Ce3+ or NSPO:Eu3+ phosphors with varying concentrations. Under UV excitation, the energy transfers from Tb3+ to Eu3+ in the NSPO host occurred mainly via a dipole–dipole mechanism, and the critical distances of the ion pairs (Rc) was calculated to be 17.94 Å by the quenching concentration method. And that, the emission colors of the NSPO:Tb3+,Eu3+ phosphors could be adjusted from green through yellow to red because of the energy transfer from Tb3+ to Eu3+. Based on its good photoluminescence properties and abundant emission colors, the NSPO:Ce3+/Tb3+/Eu3+ phosphors might be promising as potential candidates for solid-state lighting and display fields.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2018
·
IF 2.687
Yannan Qian,Xunze Tang,ZhengYu Zhang,Haiyan Zhang,Maxim Ivanov,Qibai Wu
A novel multicolor-tunable lanthanide doped 12CaO·7Al 2 O 3 (Ln 3+ :C12A7; Ln 3+ = Yb 3+ , Tm 3+ and Er 3+ ) synthesized by solid-state reaction method would greatly enhance the scope of its applications ranging from infrared solar cells to field emission display . The scanning electron microscopy (SEM) was used to characterize the morphology of Ln 3+ :C12A7. Under 980 nm excitation, the emission color was tuned from green-yellow to red region through adjusting the concentrations of Ln 3+ ions. The obtained near infrared upconversion (UC) emissions in Ln 3+ :C12A7 was corresponded to “window of optical transparency”. All blue, green and red UC emissions were populated by one-photon process, and the proposed UC mechanisms were studied in Ln 3+ :C12A7.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Jianghui Bai,Zhipeng Fan,Haitong Tang,Guangshe Li,Liping Li
Tunable multicolor luminescence materials can flexibly meet the needs of smart lighting, enabling efficient light energy use and minimizing waste. Lead-free hybrid double perovskites A2MIMIII(NO3)6 hold great potential in luminescence, benefiting from their tunable composition, high light absorption, low synthesis cost, and environmental friendliness. However, achieving tunable multicolor emission within a single matrix of these materials has yet to be realized. In this study, a series of [(CH3)4N]2KEu1–xTbx(NO3)6 single crystals have been synthesized using an environmentally friendly and mild aqueous solution evaporation method. The two emitter centers, Tb3+ and Eu3+, display energy transfer from Tb3+ to Eu3+. The emission color of the as-synthesized crystals gradually changes from red to orange, then to yellow, and finally to green with an increase of Tb3+ concentration, achieving yellow and green light emission in the three-dimensional rare-earth hybrid double perovskites for the first time. Green emission from [(CH3)4N]2KTb(NO3)6 displays the highest quantum yield at 87%. The millisecond-level emission decay time and high decomposition temperatures (365 °C) of [(CH3)4N]2KEu1–xTbx(NO3)6 single crystals highlight their potential for use in luminescent devices and phosphors, among other fields.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2025
·Vol. 31
·期 24
·e202500249
·
IF 3.7
Baoqing Sun,Ting Li,Congliang Shen,Mingyue Zhang,Zhaoyu Guang
Graphical Tb 3+ , Sm 3+ mono-/co- doped LiTaO 3 phosphors are prepared by high-temperature solid-state reaction. Emission color of LiTaO 3 : Tb 3+ , Sm 3+ shifts from green to yellow as Sm 3 ⁺ concentration increases due to energy transfer from Tb 3+ to Sm 3+ . Time-resolved color evolution from green to orange is achieved by combining the trap-assisted afterglow of Tb 3+ and stable photoluminescence of Sm 3+ . Currently, static fluorescent anti-counterfeiting technology struggles to cope with the increasingly sophisticated counterfeiting techniques, making the dynamic multimode regulation scheme an urgent necessity. Herein, Tb 3+ , Sm 3+ mono-/co-doped LiTaO 3 (LTO) phosphors are prepared by high-temperature solid-state method. Under 254 nm excitation, the emission chromaticity of LTO: Tb 3+ , Sm 3+ is modulated from green to yellow by increasing Sm 3+ content due to Tb 3+ → Sm 3+ energy transfer. The diverging luminescence thermal stability of LTO: Tb 3+ and LTO: Sm 3+ is uncovered, which is governed by their distinct vacuum-referenced binding energy (VRBE) levels and charge compensation mechanisms. Based on the time-domain difference between the trap-assisted afterglow of Tb 3+ and the photoluminescence of Sm 3+ , a dynamic anti-counterfeiting pattern that changes from green to orange over time is designed. This work provides a novel material design strategy for time-resolved color signatures and multi-modal dynamic optical encryption.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Qibai Wu,Shaoteng Lin,Zhongxiang Xie,Liqing Zhang,Yannan Qian,Yaodong Wang,Haiyan Zhang
Monodisperse Y 2 O 3 : Er 3+ /Yb 3+ /Tm 3+ nanoparticles with various dopant concentrations have been synthesized successfully by a homogeneous precipitation method. Their phase structures and surface morphologies have been characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The diversities of upconversion luminescence spectra and CIE coordinates of prepared samples are investigated in detail at room temperature under 980 nm excitation. Through adjusting the concentrations of Yb 3+ , Tm 3+ and Er 3+ ions, three upconversion emission bands in red, green and blue region could be tunable to achieve the color of interest and near white light emission can be obtained in the tri-doped Y 2 O 3 nanoparticles for a variety of application.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2018
·
IF 1.795
Qiu-hang CHEN,Shi-liang MEI,Wu YANG,Wan-lu ZHANG,Gui-lin ZHANG,Jia-tao ZHU,Rui-qian GUO
Color tunable quantum dots (QDs) based on the Cu, Mn, Ag co-doped ZnInS core and ZnS outer-shell were synthesized by using an eco-friendly method. Core-shell doped QDs with the average size of 3.85 nm were obtained by using a one-pot synthesis followed by a hot injection with n -dodecanethiol (DDT) and oleylamine (OLA) as stabilizers in oil phase. Cu, Mn and Ag ions were introduced as single-dopant or co-dopants during the synthesis, providing an effective means to control the emission color of the QDs. The as-synthesized QDs showed photoluminescence emission ranging from green (530 nm) to near-red (613 nm), adjusted by doping components, dopant concentration, and Zn/In ratio. Importantly, quasi-white emission has been achieved by controlling the concentration of co-doped metal ions (Mn, Cu and Ag). The primary results demonstrated the promising potential of co-doped QDs as alternative materials for future high quality white LED applications.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2022
·Vol. 29
·期 4
·e202202652
·
IF 5.02
Guanjie Wang,Zhen Zhang,Donghui Wang,Yu-e Shi,Zhenguang Wang
Graphical A straightforward heat- treatment strategy is proposed to load 3,4,9,10-perylenetetracarboxylic dianhydride into the matrix of boric acid to produce powders with a near-unity quantum yield and tunable emission color from yellow to green. The confinement effect of boric acid is responsible for the high emission efficiency of products. Developing solid luminescent materials with a unity quantum yield and tunable emission color is promising, although it is still a difficult task. A straightforward heat-treatment method has been developed to load 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA) into the matrix of boric acid (BA) to produce powders with a near-unity quantum yield and tunable emission color from yellow to green. Our results suggest that the emission of the powders originates from PTCDA, and the tunability of the emission color is caused by the hydrolysis of PTCDA in the alkaline environment. The near-unity quantum yield is attributed to the BA matrix, which confines PTCDA. In addition, the powder also shows excellent thermal stability that allows its application in light-emitting diodes. The above results are important for the development of solid-state luminescent materials for various applications, and also provide a clue for studying the emission properties of luminescent materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 44
·18890-18899
·
IF 2.7
Xuyan Xue,Changshuai Gong,Sihan Yang,Jian He,Meiting Li,Xuejiao Wang
Non-contact optical temperature measurement has attracted intense attention in recent years due to its advantages of high speed and high safety. In this work, a Lu2WO6:Er3+ phosphor was successfully prepared by a solid state reaction. The effective energy transfer from the [WO6]6− group to Er3+ was proved using the emission spectra and fluorescence lifetime measurements, with an estimated transfer efficiency of 51%. Benefiting from the self-luminescence of the [WO6]6− group, optical thermometry was established based on the fluorescence intensity ratio of [WO6]6− emission to Er3+ emission. Remarkably, strong emission color variability from blue to green was observed under 320 nm UV excitation as the temperature increases from 298 K to 548 K, while an opposite trend from green to cyan is observed under 378 nm UV excitation. The maximum relative sensitivity (SR Max) is 3.37% K−1 (298 K), which is highly superior to most of the previously reported values.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2017
·
IF 4.811
Qiyang Wang,Jinhua Guo,Yixiang Wang,Lingyun Chen,Jie Cai,Lina Zhang
In this study cellulose hydrogels with lanthanide ions nanoparticles embedded in were prepared via in situ doping using a low-temperature alkali hydroxide/urea aqueous solution as a cellulose solvent. Depending on the type and relative concentrations of the constituent lanthanide ions, the color of light emission were modulated to generate the three primary colors and other adjusted colors by blending red, green and blue at certain ratios. This work has opened new and convenient pathway to create regulated fluorescent cellulose hydrogels for potential applications in the fields of bioimaging and fluoroimmunoassay.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Hong Zhu,Chengdong Peng,Jiayi Li,Xuanyu Cao,Yuexiao Pan
The anion-exchange among halogen ions is an effective technique for tuning the chemical composition and emission color of all-inorganic halide perovskite CsPbX 3 (X = Cl, Br, and I) nanocrystals by tailoring their bandgaps. This work is focused on the rate of the reversible anion-exchange through finely tuning the luminescence color of perovskite nanocrystals (NCs) in any region between red and green. The luminescence color of the perovskite CsPb(I 1-x Br x ) 3 (0 ≤ x ≤ 1) has been finely tuned through tailoring its bandgap with the anion-exchange between CsPbI 3 and 4-bromo-butyric acid (BBA) instead of introducing of bromide salts as starting materials. The BBA could serve as triple functions to afford Br − ions source, short chain ligand with carboxyl group for surface passivation , and weak acid. A systematic study has been carried out to elucidate the effect of experimental parameters, on the color rangeability of the NCs and the anion-exchange rate between CsPbI 3 and BBAThe trace of water added into the system can hinder the spontaneous transformation from red CsPbI 3 to CsPbBr 3 with aging time. It is particularly valuable to realize the reversible processes from green to yellow and finally to red successively by increasing the concentration of the isolated I − ions from various inorganic iodides.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Ronghui Liu,Quanxing Wei,Lianning Dou,Liming He,Zonghao Lei,Lijie Sun,Yanfei Zou,Shikun Su,Bing Teng,Fei You,Jianhong Li,Degao Zhong
Accurate measurement of temperature during photothermal conversion is crucial for the application of up-conversion photothermal conversion fluorescent materials. In this paper, a kind of SrIn 2 O 4 : Yb 3+ , Er 3+ up-conversion phosphor with strong photothermal conversion ability and high-precision dual-mode temperature measurement performance was synthesized by high-temperature solid-state method. Under 980 nm laser excitation, a high-precision temperature measurement with a maximum relative sensitivity of S r = 1.2 %K −1 was achieved by using the fluorescence intensity ratio of the thermally coupled energy level pairs ( 2 H 11/2 / 4 S 3/2 ) of Er 3+ ions. In addition, we found that the luminescent color of the synthesized phosphor can span a large color gamut interval with the rise of temperature, realizing the optical temperature measurement based on temperature-induced color coordinate shift. On this basis, we realized dual-mode temperature monitoring and temperature self-calibration during the photothermal conversion process of SrIn 2 O 4 : Yb 3+ , Er 3+ phosphors. These results are of great practical value for the application of photothermal conversion fluorescent materials in micro-zone heating and temperature self-monitoring.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Soft Matter
·
2021
·Vol. 17
·期 17
·4550-4558
·
IF 3.679
Zhaoyu Liu,Dong Yao,Lin Ai,Huiwen Liu,Shitong Zhang,Hao Zhang
Fluorescent Cu nanoclusters (NCs) have shown potential in lighting and display, because Cu is cheap and easily available. Despite recent successes in improving the emission intensity of Cu NCs on the basis of aggregation-induced emission enhancement and self-assembly-induced emission enhancement, the difficulty in tuning the emission color sheds the doubt for achieving high-performance white light-emitting diodes (WLEDs). In this work, halogen effects are utilized to tune the emission color of Cu nanocluster self-assembly nanosheets (NSASs). By altering the adsorbed halogens from Cl, Br to I, the emission peak of Cu NSASs is tunable from 495 to 674 nm. In this context, halogen atoms are capable of improving the charge transfer and molecular spin coupling of Cu NCs, and thereby narrow the S0T1 gap and facilitate the intersystem crossing of excitons from a singlet to triplet state. As a result, emission spectra redshift and the population of the exiton recombination via the triplet state pathway is increased, which leads to the improvement of the photoluminescence quantum yield (PLQY). By simply introducing and/or mixing different types of cuprous halides, Cu nanocluster co-assembly nanosheets (NCASs) with full-color emission are obtained. The as-prepared Cu NSASs and NCASs are further employed to fabricate monochrome and white LEDs.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）