ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 19
·2010685
·
IF 18.808
Puxian Xiong,Bolong Huang,Dengfeng Peng,Bruno Viana,Mingying Peng,Zhijun Ma
Currently, most of the mechanoluminescence (ML) phosphors strongly depend on postirradiation stimulation using ultraviolet light (denoted as “UV exposure” from hereon) to show the ML. However, only a few transition metal cations are proven to be effective luminescence centers, which hinder the development of more ML phosphors. This study reports a self-recoverable deep-red-to-near-infrared ML using Cr 3+ -doped LiGa 5 O 8 phosphor with fully recoverable ML performance. The ML performance can be further optimized by tuning the trap redistributions by codoping the phosphor with Al 3+ and Cr 3+ cations. Theoretical calculations reveal the important role of Cr dopants in the modulation of local electronic environments for achieving the ML. Owing to the induced interelectronic levels and shallow electron trap distributions, the electron recombination efficiency is enhanced both through direct tunneling and energy transfer toward the dopant levels. Moreover, the ML of Cr 3+ -doped LiGa 5 O 8 can penetrate a 2-mm-thick pork slice, showing that it can have wide-ranging in vivo applications, including the optical imaging of intracorporal stress/strain distribution and dynamics. Therefore, this work fabricates a novel ML material with self-recoverable luminescence in an extended wavelength range, increasing the number of potential ML candidates and promoting the fundamental understanding and practical applications of ML materials.
研究领域:
材料科学
·
生物医学工程
·
光学成像
·
分子探针
·
转化医学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Jin-Zhao Huang,Meng-Xin Li,Kai-Zheng Song,Wan-Ying Yao,Feng-Lei Jiang
InP quantum dots (QDs) show a unique promise for display and lighting applications. However, the synthesis of InP QDs with high optical quality is much more difficult compared to that of Cd-based QDs and Pb-based perovskites. Here, we established a layer-by-layer modification approach to improve the optical properties of the InP QDs. InP QDs with green emission were prepared using tris(dimethylamino)phosphine ((DMA)3P). By introducing aluminum isopropoxide (AIP) twice during the formation of the ZnSeS and ZnS shell layers, we increased the photoluminescence quantum yield (PLQY) of the resulting Al-modified InP/ZnSeS/ZnS QDs to 96%. The full-width-at-half-maximum (fwhm) could be narrowed to 37 nm. It was speculated that the introduction of Al could alleviate the charge mismatch between the cores and shells and passivate surface defects. In addition, AIP might form oxides on the outer layers of QDs, thus enhancing their stability. Moreover, the green light-emitting diode (LED) based on Al-modified InP/ZnSeS/ZnS QDs performed well with a maximum power efficiency of 28 lm/W. This work finds a way to obtain InP QDs of high brightness and narrow emission by modification in the midsynthetic process, which will inspire the synthesis of better InP QDs.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xiaoping Jiang,Yue Guo,Lixi Wang,Qitu Zhang
Multi-mode dynamic anti-counterfeiting materials can provide complex anti-counterfeiting performance and ensure the anti-counterfeiting strategy becomes more secure. Herein, a new type of multi-mode anti-counterfeiting encryption material of CaAl 12 O 19 :Eu, Er with different Er doping concentration was developed by sol–gel method. Interestingly, the CaAl 12 O 19 :Eu, Er phosphor and its composite have multi-mode anti-counterfeiting characteristics of multi-color down-conversion luminescence, up-conversion luminescence, dynamic luminescence, and photochromism. Effect of different Er doping concentration on the down-conversion luminescence, up-conversion luminescence, dynamic luminescence, and photochromism of CaAl 12 O 19 :Eu, Er was systematically investigated, and the relevant mechanisms were discussed. These anti-counterfeiting features can be simultaneously applied in both bright and dark fields, which can achieve high-level anti-counterfeiting in both spatial and temporal dimensions. The CaAl 12 O 19 :Eu, Er phosphors cannot be easily replaced by other materials with the same anti-counterfeiting properties. They display good application foreground in the field of anti-counterfeiting encryption.
研究领域:
材料科学
·
光学
·
防伪技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
·
2018
·
IF 2.873
Shuangqiang Yue,Mu Gu,Xiaolin Liu,Fengrui Li,Juannan Zhang,Bo Liu,Shiming Huang,Chen Ni
A fast scintillation crystal, γ-CuBr, was successfully grown by hydrothermal method with NH 4 Br mineralizer. The element mole ratio of the Cu/Br crystal was about 0.91 caused by the crystal grown in a rich bromine environment. Under ultraviolet excitation, the crystal exhibited an intense 420 nm emission, a shoulder emission at 428 nm and a weak broadband emission at 560 nm, which could be related to free exciton recombination, Cu and Br vacancies, respectively. Furthermore, the X-ray excited optical luminescence of the crystal was first reported, and a strong 430 nm emission was observed. The analysis of luminescence decay kinetics revealed that the 430 nm emission is composed of two components with an average decay time of 36.9 ns. It means that the γ-CuBr crystal is a promising candidate for applications in fast radiation detection.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wanguo Liu,Fuyu Chen,Xiaogen Zhan,Peichang Ouyang
The developments of science and technology have made greenhouse plant cultivation increasingly valued, which has made the research on light sources of great significance, causing that deep-red-emitting phosphors have particular research prospects. In this work, Li 1.6 Mg 1.6 Sn 2.8 O 8 :Mn 4+ under high-temperature solid-state method is synthesized in air and Li 1.6 Mg 1.6 Sn 2.8 O 8 :Mn 4+ @PDMS film is prepared. Li 1.6 Mg 1.6 Sn 2.8 O 8 :Mn 4+ at room temperature shows deep-red emission in the range of 600 – 800 nm with photoluminescence (PL) peaks at ∼660 and 672 nm because of the 2 E g → 4 A 2g transition of Mn 4+ ion in octahedron [MnO 6 ] when it is excited by light from ultraviolet to green (250–540 nm). PL spectra of Li 1.6 Mg 1.6 Sn 2.8 O 8 :Mn 4+ under different excitation wavelength and the time-resolved PL spectra at room temperature are investigated, which confirm one luminous center (Mn 4+ ). The good thermos-stability is proved by the temperature-dependent PL spectra. The potential applications of Li 1.6 Mg 1.6 Sn 2.8 O 8 :Mn 4+ in plant growth lighting and polymer luminescent film are explored via absorption spectra of plants, PL spectrum of Li 1.6 Mg 1.6 Sn 2.8 O 8 :Mn 4+ , and Li 1.6 Mg 1.6 Sn 2.8 O 8 :Mn 4+ @PDMS film.
研究领域:
材料科学
·
光学
·
植物生物学
·
固体物理
·
高分子科学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2022
·
IF 8.008
Shuangtian Dong,Dongyang Wang,Xuwen Gao,Li Fu,Jingna Jia,Yuqi Xu,Bin Zhang,Guizheng Zou
All commercial chemiluminescence (CL) assays are conducted with either glow or flash CL of eye-visible waveband from chemical luminophores. Herein, glow and flash, as well as waveband adjustable CL from the same nanoparticle luminophore of thiol-capped CuInS2@ZnS nanocrystals (CIS@ZnS-Thiol), are proposed via extensively exploiting the differed redox nature of CL triggering reagents. Taking thiosalicylic acid (TSA) as the model thiol-capping agent, the electron-injection-initiated charge transfer between CIS@ZnS-TSA and reductant can bring out efficient glow CL while the hole-injection-initiated charge transfer between CIS@ZnS-TSA and oxidant can give off obvious flash CL under optimum conditions. The maximum emission wavelength for CL of CIS@ZnS-TSA is adjustable from 730 nm to 823 nm via employing different triggering agents. Promisingly, the coexistent reductant of N2H4·H2O and oxidant of H2O2 can be employed as dual triggering reagents to trigger eye-visible and highly efficient flash CL from CIS@ZnS-TSA. The maximum emission intensity for flash CL of CIS@ZnS-TSA/N2H4–H2O2 is 101-fold greater than the glow CL of CIS@ZnS-TSA/N2H4 and 22-fold greater than the flash CL of CIS@ZnS-TSA/H2O2, respectively. The flash CL from CIS@ZnS-TSA/N2H4–H2O2 is qualified for highly sensitive and selective CL immunoassay in a commercialized typical procedure with the entire operating process manually terminated within 35 min.
研究领域:
纳米技术
·
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Hua Ye,Denghui Liu,Fen Liu,Liangyuan Chen,Wei Hu,Yu Bai,Jiali Rao,Dehan Wu,Xinyi Cai,Shi-Jian Su
A series of light-emitting dendrimers T42Bn, T24Bn, T26Bn and T35Bn based on electron-donating units of the second-generation butyicarbazoles (G2Cz) as dendrons and electron-withdrawing core of tripyridylbenzene (TPB) were designed and synthesized. The desirable blue luminogens were obtained due to the rational molecular design based on the twisted skeleton of all the molecules despite the donors of G2Cz moieties connected to the central acceptors of TPB via a para-phenylene bridge. Their thermal, photophysical, density functional theory calculation and electrochemical properties were fully investigated. Thanks to the excellent thermal stability, film-forming ability as well as the favourable energy levels of the dendrimers, efficient solution-processed hybrid white organic light-emitting diodes (WOLEDs) were achieved by employing these blue dendrimers and the orange emitter of (acetylacetonato)-bis[2-(thieno [3,2-c]pyridin-4-yl)phenyl]iridium(III) (PO-01) as an emitting layer (EML). Among them, the device based on T42Bn exhibited the highest maximum current efficiency (CE max ) of 10.25 cd/A with a maximum external quantum efficiency (EQE max ) of 3.94% and Commission International de I'Eclairage (CIE) coordinates of (0.34, 0.39), benefiting from the largest ƞ PLQY and the highest electron transport capability of T42Bn and thus the enhancement of charge carrier balance in the device. In addition, the CIE coordinates of all the single-emitting-layer fluorescence/phosphorescence hybrid devices are very close to the benchmark white region of (0.33, 0.33). Our findings demonstrate the potential candidates of the solution-processable blue dendronized emitters for applications in full-color flat-panel displays and white lighting.
研究领域:
材料科学
·
光电化学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 29
·13119-13125
·
IF 2.7
Xueyan Wu,Na Li,Chenxi Zhang,Yan Lv,Jixi Guo
Solid-state near-infrared (NIR) luminescence fluorophores have attracted much attention due to their potential in bio applications and advanced optical devices. Therefore, it is essential to design and synthesize novel NIR AIE fluorophores and investigate their structure–activity relationships for applications. Here, we synthesized two NIR AIE o-carborane fluorophores with donor–acceptor–donor (D–A–D) structures. These fluorophores have emissions extending into the NIR region and are named CPO and CPS with phenoxazine (PXZ) and phenothiazine (PTZ) derivatives as the electron donors, respectively. Despite the very similar chemical structures of PXZ and PTZ, CPO and CPS exhibited rather different photophysical properties. The o-carborane fluorophores CPO and CPS show large Stokes shifts (>14 000 cm−1), near-infrared AIE characteristics, and self-recovering mechanochromic luminescence. The reorganization of the molecular structures in the excited state leads to the planarization of their conjugated backbones and enhances the Stokes shifts. This work not only demonstrates an efficient strategy for constructing organic NIR AIE o-carborane-containing fluorophores, but also indicates their promising potential as advanced optoelectronic materials.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Shiji Liu,Tianqi Zhao,Renagul Abdurahman,Xiuzhen Yang,Yaoxing Han,Yue Zhang,Xue-Bo Yin
With the development of new energy vehicles, the safety concern of power batteries has become urgent, making the exploitation of new temperature sensors for the batteries important. In this paper, persistent luminescence nanoparticles (PLNPs) of Bi 1.91 Ga 4 O 9 : 0.04 Er 3 + , 0.05 Eu 3+ with up- and down-conversion luminescence were prepared by a simple and low-cost co-precipitation method. Single rare earth element doping of Er 3+ achieves up-conversion luminescence at 526 nm/550 nm under 980 nm excitation. After co-doping with rare earth element Eu 3+ , it can realize the down-conversion luminescence at 590 nm/614 nm under 254 nm excitation. They showed obvious temperature dependence at 293–503 K and 423–573 K, respectively. The corresponding maximum relative sensitivities are 0.98 % K −1 and 0.55 % K −1 . Interestingly, all temperature ranges cover the spontaneous ignition point of the power battery at 473 K. Thus, the PLNPs-based sensor was successfully validated for monitoring overheating and spontaneous combustion of power battery with the dual-channel temperature measurement modes. The two kinds of temperatures were verified with each other for the improved sensitivity and accuracy, so they were used to accurately measure the temperature of the power battery in real time for early warning and the improved safety. Thus, we provided a new application scenarios of PLNPs in the field of temperature sensing for monitoring the temperature of battery.
研究领域:
材料科学
·
能源技术
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2019
·Vol. 8
·期 2
·1901209
·
IF 7.125
Xiao Chen,Weijing Yao,Qi Wang,Wei Wu
Owing to the large coding capacity and high confidentiality, dual-mode or multimode anticounterfeiting fluorescent materials are gradually substituting traditional single-mode fluorescent materials. Herein, a facile hydrothermal method is designed and used to integrate lanthanide ion (Ln 3+ )-doped NaLuF 4 nanoparticles with Y 2 O 3 -based downconversion nanorods, achieving the construction of dual-mode luminescent composite materials. The excellent optical properties of NaLuF 4 /Y 2 O 3 composites are confirmed by photoluminescence spectroscopy. The composites can be excited by a 980 nm laser to generate bright red, green, and blue colors (corresponding to Er 3+ /Tm 3+ -, Yb 3+ /Ho 3+ -, and Yb 3+ /Tm 3+ -doped NaLuF 4 , respectively), and turn into dim-red and green colors under an excitation source of 254 nm. Furthermore, the polyvinyl alcohol (PVA)-mediated stable fluorescent inks are successfully formulated and then printed onto the paper, aluminum foil, and fabric by low-cost and simple screen printing techniques to fabricate various anticounterfeiting patterns. Interestingly, the printed patterns are hard to observe under ambient light, enabling the generation of multiple emission color under excitations of 980 and 254 nm. The prepared dual-mode NaLuF 4 /Y 2 O 3 composite materials with outstanding stability and distinctive multicolor luminescent properties provide low-cost, highly effective, multilevel protection for genuine products against counterfeit.
研究领域:
材料科学
·
光学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 18
·3132
·
IF 5.719
Longshi Rao,Qing Zhang,Bin Sun,Mingfu Wen,Jiayang Zhang,Guisheng Zhong,Ting Fu,Xiaodong Niu
Carbon dots (CDs) are attracting much interest due to their excellent photoelectric properties and wide range of potential applications. However, it is still a challenge to regulate their bandgap emissions to achieve full-color CDs with high emissions. Herein, we propose an approach for producing full-color emissive CDs by employing a solvent engineering strategy. By only tuning the volume ratio of water and dimethylformamide (H2O/DMF), the photoluminescence (PL) emission wavelengths of the CDs can be changed from 451 to 654 nm. Different fluorescence features of multicolor CDs were systematically investigated. XRD, SEM, TEM, Abs/PL/PLE, XPS, and PL decay lifetime characterizations provided conclusive evidence supporting the extent to which the solvent controlled the dehydration and carbonization processes of the precursors, leading to a variation in their emission color from red to blue. The as-prepared CDs exhibited excellent and stable fluorescence performance even after being heated at 80 °C for 48 h and with UV light continuously irradiated for 15 h. Based on their excellent fluorescent properties and photothermal stability, bright multicolor light-emitting diodes with a high CRI of up to 91 were obtained. We anticipate that these full-color emissive CDs are beneficial for applications in lighting, display, and other fields.Keywords:carbon dots;multicolor emission;solvent engineering;light-emitting diodes
研究领域:
材料科学
·
光电领域
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Na Lin,Li Xiao,Yishi Wu,Yi-Fan Wu,Zi-Xian Li,Tian-Yu Yan,Zhi-Wei Chen,Cheng-Yang Yue,Dongpeng Yan,Xiao-Wu Lei
Excitation- and temperature-dependent multicolor luminescent materials are valuable in advanced optoelectronic devices while they haven't been realized in 2D metal halides owing to the restrictions of Kasha's rule. Herein, we reported a novel 2D lead-free halide of (AMP) 2 Cu 2 Br 4 (AMP = N-aminomorpholine) through structural engineering, in which the [Cu 2 Br 4 ] 2− layer is composed of corner- and edge-shared [CuBr 4 ] tetrahedron. The non-centrosymmetric structure enables (AMP) 2 Cu 2 Br 4 to exhibit an impressive second-harmonic generation signal of ≈0.8 times that of KH 2 PO 4 (KDP). Remarkably, (AMP) 2 Cu 2 Br 4 possesses two independent self-trapped exciton-emitting states under different excitation energies, which display multicolor luminescence outputs from blue, white, to orange with near-unity photoluminescence quantum yields (PLQYs). Additionally, the luminescence can be regulated in a wide temperature range of 300–400 K due to reversible energy transfer between two emitting bands, acting as a luminescence ratio thermometer with a ultrahigh relative thermal sensitivity of 56.755% K −1 . High PLQY and large Stokes shift further endow (AMP) 2 Cu 2 Br 4 strong radioluminescence with an ultrahigh light yield of 92,400 photons·MeV −1 , low detection limit of 121 n Gy air ·s −1 and a short afterglow of 0.41 m s. The abundant photophysical properties highlight the multiple optoelectronic applications of 2D cuprous halide in white light-emitting, laser technology, flexible temperature sensors, and X-ray imaging.
研究领域:
材料科学
·
光电子学
·
凝聚态物理
·
无机化学
·
功能材料
·
辐射探测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）