LUMINESCENCE
·
2024
·Vol. 39
·期 4
·e4737
·
IF 3.2
Haoquan Li,Haoyi Wu,Lei Zhang,Shuyu Qin,Jianjun Song,Yahong Jin,Yihua Hu
The predominant method for pest control has been the use of pesticides, which have been shown to have detrimental effects on soil, freshwater, and crop quality. Therefore, the development of novel and sustainable crop protection strategies has become increasingly imperative. In this study, a novel orange–red emitting Ba 2 SrWO 6 : Sm 3+ phosphor was synthesized using the high-temperature solid-state reaction. Under ultraviolet excitation, the phosphors showed obvious emission peaks at 575, 614, and 662 nm. The Ba 2 SrWO 6 : Sm 3+ was used to fabricate a fluorescence film with polydimethylsiloxane (PDMS), and attracted twice as many insects as the blank control group under 365 nm ultraviolet light. This material holds great potential as a fluorescent agent for insect trapping in the pest control fields of tea, cotton, eggplant, rice, potato, grape, and other agricultural industries. Our findings provide an eco-friendly approach to pest management for the increment of food production.
研究领域:
农业科学
·
材料科学
·
生态学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ECS Journal of Solid State Science and Technology
·
2021
·Vol. 10
·期 5
·055011
·
IF 2.07
Jian Zhang,Ming Wang,Zhiyong Fang,Xiaohui Lai,Zhiqiang Zhong,Rui Zhang
Bi3+-activated luminescence materials have gained growing attentions for optoelectronic applications. In this work, a novel BaLu2MgGa2Si2O12: Bi3+ garnet phosphor was synthesized through a traditional high-temperature solid phase reaction method. The crystal structure was ascertained through X-ray diffraction analysis and Rietveld structural refinement. The particle morphology and constituent elements distributions were investigated through scanning electron microscope and element mapping. Excited at 330 or 370 nm, the phosphors exhibit two emission peaks located at 413 and 495 nm, which is ascribed to the allowed transitions of Bi3+: 3P1 → 1S0. The luminescence intensity reaches the maximum at the 4 mol% Bi3+ doping content, and the emission color is easily manipulated by tuning the excitation wavelength. Besides, the luminescence intensity at 150 ℃ remains 80% of that at room temperature. These results suggest that the novel phosphors have promising application in the near-UV excited white LEDs.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
OPTIK
·
2023
·
IF 3.1
Shan Liu,Mingxia Lv,Jun Zhou,Yaohui Zhu,Rong Hu,Xiong Li,Denghui Xu
A series of CaLa 1- x LiTeO 6 : x Dy 3+ phosphors were synthesized via a conventional solid-state reaction method, and the effects of different Dy 3+ doping concentrations on the luminescence properties of the phosphors were studied. The excitation spectrum indicated that these synthesized phosphors had strong absorption bands in near-ultraviolet (n-UV) region in the range from 300 to 500 nm. There were two sharp emission peaks in the visible region, which were located at 483 nm, 574 nm, corresponding to transitions of 4 F 9/2 → 6 H 15/2 (magnetic dipole transition) and 4 F 9/2 → 6 H 13/2 (electric dipole transition), respectively. The phosphor CaLa 0.95 LiTeO 6 :0.05Dy 3+ shows superior thermal stability. When the temperature rises to 425 K, the luminous intensity remains at 79% compared with the initial intensity of 300 K. These results demonstrate that the CaLa 1- x LiTeO 6 : x Dy 3+ phosphors have great potential as a single-phase luminescence material for near-ultraviolet (n-UV) excitation.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2021
·Vol. 8
·期 17
·4035-4043
·
IF 6.569
Ruxin Liu,Wenjun Zhang,Guojing Li,Wenjing Liu
Advanced anti-counterfeiting materials have great research significance in the fields of economy, safety and human health. Compared with independent color mixed anti-counterfeiting materials, ultraviolet (UV) excitation wavelength-dependent discoloration, which can realize the change of the emission peak shape and color under different excitation wavelengths, is more attractive. In this work, the Sb-doped Cs2ZrCl6 vacancy-ordered double perovskite was designed and synthesized for anti-counterfeiting materials. Due to the singlet and triplet transitions of Sb3+ ions and self-trapping exciton (STE) emission of the Cs2ZrCl6 host, the material showed emission variability from blue to orange-yellow color. In addition, room temperature synthesis and excellent air and humidity stability further enhanced the potential of Sb-doped Cs2ZrCl6 for application.
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 COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xiaoyi Liu,Haiming Cheng,Bin Yue,Zhu Wen,Ying Jin,Guixia Liu,Shengda Liu,Dan Li,Jinxian Wang,Wensheng Yu,Xiangting Dong
Novel eye-sensitive Ba 3 Nb 2 O 2 F 12 (H 2 O) 2 :Tb 3+ green and Ba 3 Nb 2 O 2 F 12 (H 2 O) 2 :Mn 4+ red oxyfluoride phosphors with extremely strong absorption in the UV region were designed and synthesized by simple co-precipitation strategy. Particularly, Tb 3+ ions were doped in this matrix for the first time, which greatly improves their absorption efficiency in the near ultraviolet region (367 nm) and emits sharp green light (544 nm). In addition, the Ba 3 Nb 2 O 2 F 12 (H 2 O) 2 :Mn 4+ red phosphors have strong zero phonon line (ZPL) emission at 625 nm, which is conducive to improving the sensitivity of human eye and color purity. Meanwhile, the optical properties of the red phosphor are significantly enhanced via doping K + cations as charge compensators. Crystal field environment and nephelauxetic effect of the as-prepared phosphors before and after K + cation doping were systematically analyzed. Moreover, these synthesized red/green phosphors have good thermal stability and moisture resistance. Remarkably, the as-prepared Ba 3 Nb 2 O 2 F 12 (H 2 O) 2 :5%Mn 4+ or K 0.9 Ba 2.1 Nb 2 O 2 F 12 (H 2 O) 2 :5%Mn 4+ red phosphors can be directly mixed with the as-synthesized Ba 3 Nb 2 O 2 F 12 (H 2 O) 2 :13%Tb 3+ green phosphor coating on 365 nm near-ultraviolet LED chip to package WLED devices with excellent electroluminescence performance. These findings are conducive to opening an avenue for screening the unique structure of optical 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
OPTICAL MATERIALS
·
2025
·
IF 4.2
Linfang Ma,Yanan Li,Xiaoyi Liu,Shengda Liu,Guixia Liu,Dan Li,Jinxian Wang,Wensheng Yu,Xiangting Dong
The self-activated and rare earth Dy 3+ and Eu 3+ ions doped Na 2 YMg 2 V 3 O 12 phosphors with single garnet structure were obtained by using solid state reaction method. Self-activated Na 2 YMg 2 V 3 O 12 phosphors have a wide excitation band in near-ultraviolet range, Dy 3+ and Eu 3+ ions were co-doped in Na 2 YMg 2 V 3 O 12 host to broaden the excitation peak range of the phosphors. Using 365 nm near-ultraviolet light as the excitation wavelength, Na 2 YMg 2 V 3 O 12 :Dy 3+ ,Eu 3+ phosphors simultaneously emit sharp transition peaks of Dy 3+ ions at 487 nm and 576 nm, and red transition peaks of Eu 3+ at 595 nm, 611 nm and 635 nm. The energy transfer processes between VO 4 3− , Dy 3+ and Eu 3+ were discussed. The multicolor light emitting can be adjustable and white light can be realized due to the changing amount of the doped ions. Emission spectra dependent of temperature showed that Na 2 YMg 2 V 3 O 12 :Dy 3+ , Eu 3+ phosphors had good thermal quenching performance, indicating that the phosphors can be used in the field of near ultraviolet excited WLED.
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 THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 106
·期 6
·3654-3662
·
IF 3.9
Kailei Lu,Wenhan Han,Gang Cheng,Xinghua Zhu,Shirui Li,Hao Guo,Bosen Gu,Yucheng Ye,Jianqi Qi,Tiecheng Lu
Attaining effective warm white light emitting in functionally advantageous transparent polycrystalline ceramics is vitally important to guarantee the development of both human and botanical systems. In response to this aim, a series of Dy 3+ -doped Y 2 Zr 2 O 7 (YZO) transparent ceramics were prepared via a solid-state reaction and vacuum sintering approach in this work. These fabricated ceramics show high transparency, where the in-line transmittance at 700 nm is about 76%, which is very close to the theoretical limit (78%). In addition, under the excitation of UV light sources (358 and 384 nm), strong warm white light emissions were observed in these YZO:Dy transparent ceramics. The corresponding photoluminescence characteristics and mechanisms of YZO:Dy ceramics are investigated carefully. The Dy-doped YZO ceramics integrate with high transparency and UV-excitable warm white light emission properties, making them promising light-emitting converter materials for light-emitting source applications.
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
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jianwei Dao,Zihao Han,Zhihao Jiang,Tiqun Wei,Junlin Xue,Bin Wang,Sicheng Yi,Liang Yang
Narrow-band red phosphors excited by near-ultraviolet light (n-UV) are significant for enhancing the R9 index and can produce high color rendering white LEDs. A range of KSr 1-x-y Ca y PO 4 :xEu 3+ red phosphors were synthesized by high-temperature solid-state reaction method. We investigated the effects of partially substituting Sr 2+ ions with Ca 2+ ions on the phosphors' crystal structure, photoluminescence and thermal stability. Significantly, incorporating Ca 2+ ions enhances the luminescent properties and thermal stability. Under n-UV light excitation, all samples exhibit red emission around 614 nm, corresponding to the 5 D 0 → 7 F 2 transition of Eu 3+ ions. At the doping concentration of Eu 3+ ions (x = 0.08), an optimal KSr 0.52 Ca 0.4 PO 4 :0.08Eu 3+ (y = 0.4) sample was obtained. The excitation wavelength exhibited a slight violet shift from 398 nm to 396 nm. At 150 °C, the luminescence intensity of KSr 0.92 PO 4 :0.08Eu 3+ remains 80.1 % of its value at room temperature, while that of KSr 0.52 Ca 0.4 PO 4 :0.08Eu 3+ reaches 89.7 %. White LED device can be fabricated by combining the as-prepared KSr 0.52 Ca 0.4 PO 4 :0.08Eu 3+ red phosphor with commercial BaMgAl 10 O 17 :Eu 2+ blue and (Ba, Sr) 2 SiO 4 :Eu 2+ green phosphors, along with encapsulation using n-UV LED chip (395–400 nm). The device emits bright white light and exhibits a high color rendering index (Ra = 87.6, R9 = 89.8) and suitable correlated color temperature (CCT = 5523 K) at 300 mA drive current. The results demonstrate that this work provides new application prospects for the fabrication of high color rendering white LEDs using n-UV light.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2024
·
IF 3.2
Pengju Xia,Yifeng Lei,Wanyuan Li,Kaiting Wu,Chengyu Ni,Man Xu,Wubin Dai
With the growing public awareness of protecting vision and prevention of hazardous effects, there is much-needed research on a “healthy” full visible spectrum under near-ultraviolet (nUV) excitation in phosphor-converted white light-emitting diodes (pc-wLEDs) to fill the “cyan gap” and avoid employing a blue LED chip. Herein, a novel series of borosilicates Ba2CaB2Si4O14 (BCBS): Ce3+/Tb3+/Sm3+/Sr2+/Na+ phosphors, presenting color-tunable photoluminescence (PL), high quantum yield (QY), and thermal stability, were designed and synthesized via a facile solid-phase reaction. The Rietveld analyses, density functional theory (DFT) simulations, and theoretical calculations of bond energy together imply the site occupations of Ce/Tb/Sm on Ba2+/Ca2+ sites with a preferred location on Ca2+ over the Ba2+ site. The broad/bright cyan-PL from BCBS: Ce under nUV excitation is associated with the allowed f–d transitions of Ce3+ and dual-site occupancies. The forbidden f–f transitions of both the green-PL of Tb and the red-PL of Sm were insensitive to the site environment and helpful to PL color regulation. The cascading Ce → Tb → Sm energy transfer is confirmed, where Tb is regarded as an energy transfer (ET) bridge to avoid the metal–metal charge transfer (MMCT) effect. The introduction of Na+ as both flux and charge compensator is for the sake of decreasing defects from heterovalent substitutions and regulating morphology. Further incorporation of Sr2+ is to modulate the lattice environments of dopants for controlling the shift of PL. Finally, as a proof-of-concept implement, a pc-wLED assembled by BCBS: Ce/Tb/Sm/Sr/Na and an nUV LED chip via a remote “capping” packaging strategy show attractive performance.
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
Chemistry-Switzerland
·
2025
·Vol. 7
·期 3
·90
·
IF 2.4
Tianning Zheng,Ruihao Huang,Haoran Zhang,Song Ye,Deping Wang
Silver nanoclusters that are confined inside zeolites can give off intensive tunable emission across the visible region under UV excitation. In this research, a series of silver nanoclusters loaded with R-FAU/Ag (R = Li, Na, K) zeolites were synthesized and then applied as phosphors for LEDs. The XRD and SEM measurements showed the R-FAU/Ag (R = Li, Na, K) zeolites have high crystallinity and a size distribution of 0.7–1.25 μm. Under excitations of 310–330 nm ultraviolet radiation, Li-FAU/Ag, Na-FAU/Ag, and K-FAU/Ag exhibit monotonically declining emission intensities and red-shifted emissions with peak wavelengths of 520, 527, and 535 nm, respectively. By using silicone-based epoxy resin as the packaging material, a series of LEDs were fabricated by mixing R-FAU/Ag (R = Li, Na, K) phosphors. It is indicated that the Li-FAU/Ag-LED shows the strongest intensity of 94.9 mcd, much higher than that of the LEDs made from Na-FAU/Ag (63.7 mcd) and K-FAU/Ag (74.2 mcd) phosphors. Additionally, the chromaticity coordinate of the Li-FAU/Ag-LED is located at (0.2651, 0.4073) and has a high color temperature of 7873 K. Thermal test data showed that upon heating to 440 K, the intensities of R-FAU/Ag (R = Li, Na, K) LEDs decreased to 81%, 79%, and 75% of their initial intensities measured at 280 K, respectively. This research proposes a method for regulating the luminescent properties of silver nanoclusters in FAU zeolite by modifying the extra-framework cations and demonstrates excellent performance in LED products.
研究领域:
材料科学
·
无机化学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2018
·
IF 2.32
Zhenzhen Zhou,Guanghui Liu,Jia Ni,Wanlu Liu,Qian Liu
A kind of novel compound Ba 1-x (Zr,Ti)Si 3 O 9 :xEu simultaneously activated by different-valence Eu 2+ and Eu 3+ ions has been successfully synthesized. The existence of Ti 4+ -O 2- charge transfer (CT) transitions in Ba 1-x ZrSi 3 O 9 :xEu is proved by the photoluminescence spectra and first principle calculations, and the Ti 4+ ions come from the impurities in commercial ZrO 2 raw materials. Under the excitation of multi-wavelength ultraviolet radiation (λ EX = 392, 260, 180 nm), Ba 1-x ZrSi 3 O 9 :xEu (x = 0.15) can directly emit nearly white light. The coexistence of multiple luminescent centers and the energy transfer among Zr 4+ -O 2- CT state, Ti 4+ -O 2- CT state, Eu 2+ and Eu 3+ ions play important roles in the white light emission. Ba 1-x ZrSi 3 O 9 :xEu (x = 0.15) has good thermal stability, in particular, the intensity of emission spectrum (λ EX = 392 nm) at 150 °C is ∼96% of that at room temperature. In general, the multi-wavelength ultraviolet-excited single-phase white light emitting phosphor Ba 1-x (Zr,Ti)Si 3 O 9 :xEu possesses a promise for applications in white light emitting diodes (WLEDs), agriculture, medicine and other photonic fields.
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
Optical Materials Express
·
2022
·Vol. 12
·期 10
·4117-4132
·
IF 3.074
Zihan Zhao,Zihan Zhao,Ran Zhang,Ran Zhang,Hao Song,Yanjie Zhang,Yanjie Zhang,Yanjie Zhang,Xiuping Wu,Desheng Li,Bing Li,Bing Li
As blue emitting component in phosphor-converted white-light-emitting-diodes (pc-wLEDs) encapsulated with near-ultraviolet (NUV) chips, Eu2+ activated fluorapatite structure phosphors play key roles because of strong structural stability and excellent photoluminescent properties. A series of M5(PO4)3F: Eu2+ (M = Ca, Sr) samples have been newly prepared by deposition-precipitation process (DP) and exhibited a 6.7-fold enhancement of photoluminescent (PL) intensity due to the highly dispersed Eu2+ luminescence centers when compared with the reference samples synthesized via traditional solid-state reaction method (SSR). Detailed analysis of crystal field around Eu2+ and the nonlinear fitting of PL spectra concludes that Eu2+ activators with the 4f6 → 4f75d transition preferentially replace Ca1 in 4f symmetry sites leading to a fitted peak at 446 nm and the other sites of 6h are contributed to the 479 nm emitting of Eu2+ ions. Remarkably, tunable chromaticity of DP-M5(PO4)3F: Eu2+ with high color purity (97.79%) retains steady photoelectric converting and full width at half maxima (FWHM) of 46 nm in the device of DP-FAp: 0.03Eu2+@365 nm LED under diverse driving currents, which perfectly satisfies the requirements of excitation light source for oral photocuring materials. Further, the 123.4% color gamut of National Television System Committee (NTSC) standard is efficiently obtained by matching Sr5(PO4)3F: Eu2+, CsPbBr3 and Lu3Al5O12: Mn4+ phosphors with a 365 nm chip (1 W) to achieve high-quality white light (CRI value reaches to 86, CCT is 7107 K and CIE chromaticity coordinate arrives at (0.292, 0.376), indicating a potential candidate for dentistry curing light and high-quality NUV excited pc-wLEDs.
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）