Journal of Physical Chemistry C
·
2015
·
IF 4.772
Lili Wang,Hyeon Mi Noh,Byung Kee Moon,Sung Heum Park,Kwang Ho Kim,Jinsheng Shi,Jung Hyun Jeong
Dual-mode excitation properties were introduced in Sm3+ doped Sr2CaMoO6 prepared by a high temperature solid state reaction technique. Two ways are available to generate white light in the single-component phosphor activated by Sm3+ ions. Warm white light can be obtained from Sr1.995Sm0.005CaMoO6 phosphor pumped by 380 or 411 nm excitation energy. The full visible spectral emission of the single-phase phosphor comes from the high and low level emission lines of Sm3+ ions as well as the intrinsic luminescence of MoO6 group. It is also competitive as yellow-emitting phosphor for blue pumped white LEDs and gives three emission bands at 567, 603, and 650 nm, presenting yellow luminescence upon 466 nm radiation. The 650 nm red emission band corresponding to 4G5/2 → 6H9/2 transition of Sm3+ can make its color rendering index better. The excellent photoluminescence of Sr2CaMoO6 is related to the partial tilting CaO6 octahedral and the lowered symmetry were confirmed by General Structure Analysis System. Band gap of Sr2CaMoO6 estimated from the diffuse reflection spectra and also calculated by CASTEP mode shows its semiconducting character. All the results show that the Sr2–xSmxCaMoO6 phosphors have considerable potential for applications in near UV LED or pumped by blue LED chip.
研究领域:
材料科学
·
光学材料
·
光子学
·
固态化学
·
发光材料
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LED技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Yi Zhu,Feng Tong,Hui Si,Liji Su,Wenguang Dai,Shu Nie,Zheng Chen,Sheng Huang,Xiuquan Gu
Perovskite quantum dots (PQDs) have shown exceptional optoelectronic properties for displays, but their practical application is hindered by low efficiency and poor stability stemming from high defect density. To address this, a one-pot synthesis has been developed, using ZnO nanocrystals (NCs) as a structure-directing agent to construct a unique sandwich architecture. These QDs consist of a ZnO core, an epitaxially grown CsPbX 3 crystalline domain, and an outer ZnO shell. Theoretical calculations reveal that ZnO incorporation significantly enhances QD stability by raising the formation energy and suppressing defect generation. Consequently, Attributed to effective defect passivation and interfacial stabilization by the ZnO sandwich structure, the PQDs exhibit a high photoluminescence quantum yield (PLQY) of 95%, compared to ~52% for the pristine counterparts. More importantly, the PQD-based composite films exhibit high stability under combined thermal, aqueous, and optical stresses, retaining over 70% of their initial PL intensity, which is markedly higher than that of <30% retained by the control samples. Moreover, continuously tunable emission from 518 to 690 nm was realized by adjusting the halide composition. A high-performance white LED was fabricated by integrating the QD composite film with a blue LED chip, achieving a color gamut covering 134% NTSC and 100% Rec. 2020. This work provides a solution through a one-pot synthesized sandwich structure that concurrently enhances both the efficiency and stability of PQDs, paving the way for future displays.
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高影响因子
Advanced Materials Technologies
·
2026
·
IF 6
Yangyang Xu,Gongyang Chen,Huili Wu,Qike Sun,Ziqiong Gu,Hui Deng,Jiansong Yin,Changjiang Yu,Timur Borjigin,Jacques Lalevée
In terms of photopolymerization, a crucial role in the photoinitiation step is played by the photoinitiators that can generate the initiating species by absorbing suitable lights. Nowadays, the study for visible light-sensitive photoinitiators is appealing more and more research interest. In this work, two kinds of difluoroboronated pyridylhydrozone derivatives substituted by triphenylamine moiety were carefully designed and proposed as the potential photoinitiators under visible lights irradiation. These two organoboron dyes displayed a broad light absorption property in the ultraviolet (UV) and visible range. Very interestingly, in combination with amine and iodonium salt to form three-component systems, a tiny amount of the organic boron photoinitiators could initiate the free radical photopolymerization of acrylate monomers efficiently under the irradiation of violet and blue lights, respectively. Based on experimental characterizations and theoretical calculations, the photochemical reactivity and the underlying chemical mechanism within the photoinitiating systems were investigated in detail. Moreover, the photoinitiation capacity of the reported organic dyes was successfully applied in 3D printing area, and many tridimensional patterns were fabricated, which showed remarkable emission properties.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Liying Zhu,Gangyi Zhang,Yaxuan Li,Zhengjia Huang,Yuheng Zhang,Huidong Xie,Zuobin Tang
Low-dimensional indium-based metal halide materials have emerged as promising optoelectronic materials owing to their outstanding photophysical properties. However, the low photoluminescence quantum yield (PLQY) caused by forbidden transitions has limited their further application in optoelectronic devices. Here, a novel orange-yellow emitting (C 25 H 21 ClP) 2 InCl 5 :Sb 3+ 0D hybrid metal halide single crystal was successfully designed and synthesized, with a PLQY approaching 100%. This near-unity efficiency stems from Sb 3+ -induced band structure engineering, which effectively suppresses non-radiative recombination pathways while enhancing radiative decay. The efficient broadband orange-yellow emission originates from self-trapped excitons (STEs) induced by strong electron-phonon coupling, accompanied by unique low-temperature anti-thermal quenching behavior. This sample exhibits highly efficient luminescence responses under various external stimuli, with its mechanoluminescence (ML) performance being particularly outstanding. It is the first reported indium-based metal halide with significant mechanical luminescence properties. The above-mentioned multi-modal stimulus response characteristics endow (C 25 H 21 ClP) 2 InCl 5 :Sb 3+ with significant potential in advanced application fields such as pressure-sensitive sensing, security anti-counterfeiting, and white light-emitting diodes (WLEDs) applications.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wenke Ruan,Shuli Gu,Wei Li,Heru Li,Qianchuan Xiao,Mubiao Xie
The development of efficient, tunable excitation/emission and sustainable luminescence mode single-phase inorganic luminescent materials plays an important role in the progress of information encryption and advanced anti-counterfeiting technology. Herein, a general high temperature solid phase method was employed to synthesize Bi 3+ and Eu 2+ co-doped BaZrSi 3 O 9 (BZSO) phosphors, which show properties of spectral tuning and temperature sensitivity and have potential applications in lighting and anti-counterfeiting. The optimized cyan-emitting phosphor BZSO:0.03Bi 3+ ,0.05Eu 2+ phosphor in w-LED devices to significantly improves the color rendering index (CRI) from 89 to 93, while the correlated color temperature (CCT) is reduced from 5002 K to 4609 K. By substitution of Bi 3+ with varying concentrations of Eu 2+ in BZSO, the luminescent color of the hosts can be tuned from yellow to green. The photoluminescence (PL) spectra of BZSO:0.03Bi 3+ ,0.05Eu 2+ sample varies with the excitation wavelength (270 to 420 nm). The prepared powder was mixed with soluble polyvinyl alcohol (PVA) to prepare advanced anti-counterfeiting ink. The prepared of BZSO:0.03Bi 3+ ,0.05Eu 2+ /PVA composite luminescent film not only has good thermal stability, water resistance, transparency, flexibility, foldability and easy processing performance, but also has the characteristics of adjustable multi-mode luminescence and sustainable luminescence. In short, this changing-color and long-lasting luminescent fluorescent material offers the possibility of sophisticated advanced anti-counterfeiting applications in the future.
研究领域:
材料科学
·
光学材料
·
固态照明
·
防伪技术
·
发光材料
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2025
·
IF 7.2
Yuwei Pu,Ruiru Liu,Mingjin Li,Xiao Wang,Zhenfu Zhao,Ziyang Hu
Mixed-halide perovskite nanocrystals (PeNCs), such as CsPbBr x I 3-x , offer tunable emission and high photoluminescence quantum yield (PLQY) for pure red perovskite light-emitting diodes (PeLEDs). However, surface defects and phase instability, worsened by long-chain ligands, reduce stability and efficiency. A dual-strategy approach is developed by combining Mg 2 ⁺ doping with in situ 1,8-octanedithiol passivation to fabricate stable, efficient CsPbBr x I 3-x PeNCs films. Mg 2 ⁺ doping induces lattice contraction, suppresses iodine vacancies, and enhances phase stability. In situ 1,8-octanedithiol treatment, using ethyl acetate as a nonpolar antisolvent, replaces insulating ligands with short-chain HS − -terminated ligands, passivating defects. These PeNC films enable pure red PeLEDs with a 635 nm emission peak, an external quantum efficiency (EQE) of 24.2%, a luminance of 14406 cd m − 2 , and a half-life of 69 min at 1000 cd m − 2 , outperforming pristine PeNCs-based devices (EQE of 3.15%, T 50 of 12 min). This in situ strategy minimizes deposition-induced defects, offering a scalable route for high-performance PeLEDs in display technologies.
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Ya Chu,Weiqiang Zhang,Baoye Hu,Jinghong Wen,Mengmei Qin,Guangjiu Zhao
Regulation of surface ligands in hybrid organic–inorganic perovskite quantum dots (HOIP QDs) is key to enhancing their optoelectronic properties. However, achieving both high photoluminescence (PL) and long-term stability in chiral HOIP QDs remains challenging. Here, we report the use of chiral anthraquinone derivatives (AQ) as surface ligands, replacing conventional long-chain alkyl ligands, to construct two potassium-doped chiral QDs, (R)AQ-QDs and (S)AQ-QDs. These QDs exhibit high photoluminescence quantum yields (PLQYs) of 98.74 and 97.68%, respectively, along with notable stability. Optical characterization indicates an efficient chirality transfer from the organic ligands to the K0.23MA0.77PbBr3 lattice. Furthermore, density functional theory (DFT) calculations and femtosecond transient absorption (fs-TA) spectroscopy reveal reduced surface trap states, as evidenced by stronger ligand binding and prolonged carrier lifetimes. A white-light-emitting diode (LED) fabricated using the AQ-QDs shows a color rendering index (CRI) of 65.1 and a correlated color temperature (CCT) of 6169 K. The reported work highlights the potential of chiral ligand engineering in improving PL efficiency and stability in perovskite QDs.
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2025
·Vol. 54
·期 39
·14914-14925
·
IF 3.3
Fei Wang,Huihui Chen
Red-emitting phosphors with high thermal stability are of great significance for improving the performance of phosphor-converted white light-emitting diodes (pc-WLEDs). A series of Ba3La2W2O12:xEu3+ (BLWO:xEu3+, 0 ≤ x ≤ 0.12, Δx = 0.02) red phosphors excitable by UV-near UV and blue light were successfully synthesized via high-temperature solid-state reaction. The crystal structure, micromorphology, and optical properties of the BLWO:Eu3+ phosphor were systematically investigated. The emission spectrum of the BLWO:Eu3+ phosphor is dominated by the red emission at 616 nm originating from the electric dipole 5D0 → 7F2 transition of Eu3+. Notably, the 5D0 → 7F4 emission at 702 nm exhibits remarkable intensity, reaching approximately 70% of the strongest 5D0 → 7F2 emission (616 nm). The optimal Eu3+ doping concentration in the BLWO:Eu3+ phosphor was determined to be 0.06, with the concentration quenching mechanism governed by electric quadrupole–quadrupole (q–q) interactions. The BLWO:0.06Eu3+ phosphor demonstrates excellent quantum efficiencies with an internal quantum efficiency (IQE) of 62.91% and an external quantum efficiency (EQE) of 35.23%, along with outstanding thermal stability. Benefiting from these superior properties, the phosphor was successfully employed in WLED fabrication. The resulting device exhibits warm white light with CIE 1931 chromaticity coordinates of (0.3453, 0.3518) and a high color rendering index (Ra) of 80.3.
研究领域:
材料科学
·
光学材料
·
固态照明
·
光子学
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产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2014
·Vol. 43
·期 16
·6132-6138
·
IF 4.097
Wanyuan Li,Rong-Jun Xie,Tianliang Zhou,Lihong Liu,Yuejin Zhu
The promising green oxynitride phosphor, Ba3Si6O12N2:Eu2+, was synthesized at 1350 °C for 5 hours under a reducing N2/H2 (5%) atmosphere by using the solid-state reaction method. The phase purity was investigated by varying the nominal compositions, and the pure phase was achieved by carefully controlling the Si/Ba and O/Ba ratios. The phosphor displayed a broad excitation band spanning from the ultraviolet (UV) to the blue spectral region, and showed a single symmetrical emission band peaking at 525 nm with a full width at half maximum (FWHM) of ∼68 nm. The as-prepared green phosphor exhibited a small thermal quenching, which remained 90% of the initial emission intensity when measured at 200 °C. The internal and external quantum efficiencies measured under 450 nm excitation were 68 and 38%, respectively. Color temperature-tunable white LEDs with a high color rendering index of Ra = 88–94 were attained by combining the prepared green phosphor and a red phosphor Sr2Si5N8:Eu2+ with a blue LED chip.
研究领域:
材料科学
·
无机化学
·
发光材料
·
半导体照明
·
光电工程
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DOI
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 31
·11703-11712
·
IF 4.569
Jun Sun,Minghui Zhou,Bei Zhang,Youjie Hua,Feifei Huang,Hongping Ma,Renguang Ye,Shiqing Xu
A series of Rb1−yKyNa3(Li3SiO4)4:Eu2+(0 ≤ y ≤ 1) phosphors were successfully synthesized through a high-temperature solid-state reaction. The introduction of K+ into the RbNa3(Li3SiO4)4:Eu2+ phosphor to partially or completely replace Rb+ allows the emission spectrum to be modulated from blue (λ = 473 nm, FWHM = 22.5 nm) to a narrow cyan band (λ = 485 nm, FWHM = 21.1 nm). As the K+ ion content increases, the space group of the phosphor evolves from I4/M to I41/A. The complete replacement of Rb+ by K+ results in the KNa3(Li3SiO4)4:Eu2+ cyan phosphor, which shows excellent thermal stability (the comprehensive emission loss is only 8% at 150 °C) and can be used to fill the cyan light gap in white LED devices. By adding the KNa3(Li3SiO4)4:Eu2+ cyan phosphor in packaging with yellow and red phosphors, the color rendering index is increased from 90.2 to 97.1 and the correlated color temperature improved to 3658 K. These results indicate that the cyan phosphor has important application value in full-spectrum white LEDs.
研究领域:
材料科学
·
光学工程
·
无机非金属材料
·
发光材料
·
半导体照明
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 10
·3672-3681
·
IF 7.393
Sheng Wu,Puxian Xiong,Xiaoqi Liu,Yubin Fu,Quan Liu,Yang Chao,Quan Dong,Yuanyuan Li,Weiwei Chen,Yan Chen,Zhijun Ma,Mingying Peng
In this study, a blue fluorescent material Sr3Y(BO3)3:Bi3+ was synthesized by the high temperature solid-state reaction method. The corresponding structural characteristics, concentration and temperature dependent luminescence characteristics of Sr3Y(BO3)3:Bi3+ and the LED device performances were systematically studied. At different excitation wavelengths in the range of 340–375 nm, the photoluminescence (PL) region can be adjusted from green (CIE: (0.2524, 0.4063); Peak: 511 nm) to blue (CIE: (0.1936, 0.1236); Peak: 415 nm). The best excitation peaked at ∼370 nm, which well matches with the emission of a commercial near-ultraviolet (NUV) light-emitting diode (LED) chip. The thermal quenching experiment was performed, and the activation energy was calculated as 0.23 eV. At high temperature, the Sr2.55Y(BO3)3:0.45Bi3+ phosphor presented good thermal stability (79.99% of RT emission intensity at 420 K). LED devices (chip: 370 nm) using the Sr2.55Y(BO3)3:0.45Bi3+ phosphor as a fluorescent material showed excellent electroluminescence performance. Under a driving current of 20 mA, the devices showed CIE coordinates of (0.3842, 0.3980), a correlated color temperature (CCT) of 4053 K and a high color rendering index (Ra) of 91.6. This work demonstrates that Sr3Y(BO3)3:Bi3+ is a promising NUV excited blue fluorescent material which shows advantage in white light-emitting diodes for solid-state lighting.
研究领域:
材料科学
·
光电子学
·
发光材料
·
固态照明
·
LED技术
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DOI
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 6
·1085
·
IF 5.3
Qingchao Zhou,Zhongyi Shang
The commercial application of colloidal semiconductor nanocrystals has been realized owing to the development of composite film technology. Here, we demonstrated the fabrication of green and red emissive CuInS2nanocrystals embedded polymer composite films of equal thickness by using a precise solution casting method. The impacts of polymer molecular weight on the dispersibility of CuInS2nanocrystals were then systematically studied through evaluating the decrease in transmittance and red shift of emission wavelength. The composite films made from PMMA of small molecular weights exhibited higher transmittance. Applications of these green and red emissive composite films as color converters in remote-type light-emitting devices were further demonstrated.Keywords:CuInS2nanocrystals;PMMA;composite films;molecule weights;white LEDs
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
危险品化学品经营许可证（带存储）