JOURNAL OF RARE EARTHS
·
2023
·
IF 4.9
Danyu Zhang,Yuxuan Luo,Junyu Chen,Lianjie Li,Hai Guo
Dual-excitation and dual-emission Y 4 GeO 8 :Bi 3+ ,Sm 3+ phosphors were manufactured by traditional solid-phase sintering technique. The X-ray diffraction, morphology, photoluminescence, energy transfer process and temperature sensing properties of Y 4 GeO 8 :Bi 3+ ,Sm 3+ samples were comprehensively evaluated. The Y 4 GeO 8 :Bi 3+ ,Sm 3+ phosphors exhibit characteristic emissions of Bi 3+ ( 3 P 1 → 1 S 0 ) and Sm 3+ ( 4 G 5/2 → 6 H) under both 290 and 347 nm excitations. In fluorescence intensity ratio and Commission International de L'Eclairage coordinates modes, Y 4 GeO 8 :Bi 3+ ,Sm 3+ samples present excellent temperature measurement performance. The maximum relative sensitivity ( S r-max ) values of the former are 1.55 %/K (460 K, 290 nm excitation) and 0.82 %/K (506 K, 347 nm excitation). The S r-max ( x ) values of the latter are 0.21 %/K (437 K, 290 nm excitation) and 0.15 %/K (513 K, 347 nm excitation). These results illustrate that Y 4 GeO 8 :Bi 3+ ,Sm 3+ phosphors can be used as a candidate material for a dual-mode optical thermometer under dual-excitation.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Mingjie Dan,Zhichao Deng,Zijian Kong,Yi Yu,Xiurong Zhu,Huan Ye,Yingying Wang,Zishan Li,Mei Lai,Kenneth R. Poeppelmeier
The realization of white light emission in a single matrix has always been a problem that researchers are working on. As a new luminescent material, lead-free halide double perovskites(DPs) has made this idea possible due to its wide emission spectrum. However, the drawback of low photoluminescence quantum yield (PLQY) originated from self-trapping excitons (STEs) has seriously hindered their development and applications. In this study, we focused on Cs 2 NaGdCl 6 (CNGC) DP nanocrystals, and enhanced the STEs, corresponding to the much developed blue emission intensity at about 470 nm by introducing Sb 3+ , associated with the significant increase of PLQY up high to 90.09 % at the optimal doping level. To achieve the all-spectrum white light within this phosphor, the lack wavelengths at green and red region has to be compensated and Sm 3+ is an ideal candidate. Therefore, the spectrum of CNGC:Sb 3+ was expanded via further co-doping Sm 3+ and consequently the emission color is tuned from blue to white contributed by the effective energy transfer from STEs to Sm 3+ . Finally, an UV-excited LED device based on CNGC:Sb 3+ /Sm 3+ phosphor was fabricated and strong white light emitting was achieved. The CIE of the device coordinates in the cold white region of (0.33, 0.30), associated with the color temperature of 5794 K. All the results indicate that the CNGC:Sb 3+ /Sm 3+ phosphor possesses great potential in the application of full spectrum lighting as prominent single-component white light emitter.
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
·
2023
·
IF 5.2
Jiamei Song,Xinyu Zhang,Ninglei Huang,Hongjian Dou,Bo Chen,Xiuna Tian,Changjun Wang,Lingyuan Wu
A zincate material, BaLa 2 ZnO 5 was successfully synthesized by a high-temperature solid-state method as a host for Bi 3+ . All the peaks in the X-ray diffraction patterns of the obtained material could be attributed to single phase BaLa 2 ZnO 5 . The BaLa 2 ZnO 5 host exhibited strong band-to-band absorption in the range of 200–290 nm. After the doping of Bi 3+ , the absorption band due to band-to-band transition decreased, and three new absorption bands appeared. Upon monitoring the luminescence of Bi 3+ at 407 nm, three excitation peaks were observed for BaLa 2 ZnO 5 : Bi 3+ , which could be attributed to A, C and metal-to-metal charge-transfer states by analyzing its excitation and absorption spectra . When codoped with Bi 3+ and Sm 3+ , BaLa 2 ZnO 5 : Bi 3+ /Sm 3+ exhibited strong energy transfer process from Bi 3+ to Sm 3+ . Variable-temperature emission spectra revealed that the luminescence intensity of Bi 3+ decreases rapidly with the increase in temperature, while that of Sm 3+ ions decreases slowly. The relative sensitivity ( S R ) values of the BaLa 2 ZnO 5 : Bi 3+ and BaLa 2 ZnO 5 : Bi 3+ /Sm 3+ phosphors to temperature (1.77 and 1.12% K −1 , respectively) were high and extremely stable in the range of 293–423 K. Therefore, the Bi 3+ -doped BaLa 2 ZnO 5 phosphor has great application potential for biological temperature sensing.
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 Materials Chemistry C
·
2022
·Vol. 10
·期 45
·17343-17352
·
IF 8.067
Shao Yan,Yanjie Liang,Yi Zhang,Bibo Lou,Jingwei Liu,Dongxun Chen,Shihai Miao,Chonggeng Ma
Solar-blind ultraviolet-C (UVC; 200–280 nm) luminescent materials have exhibited great potential for wide applications in photomedicine and photochemistry due to the unique spectral features of UVC light. However, it is still a challenging work to develop persistent phosphors emitting in the UVC spectral region owing to the lack of suitable host materials and emitting centers. Herein, we report a series of LiLuSiO4:Pr3+,Sm3+ UVC persistent phosphors that can be charged by a 254 nm UV lamp or a high-energy X-ray beam giving rise to long-lasting UVC light emission peaking at 280 nm. More importantly, a considerable enhancement of UVC afterglow intensity and decay time has been achieved by Sm3+ co-doping because the Sm3+ ions can act as effective electron traps, which has been verified by the spectroscopic investigations and first-principles calculations. On top of this, narrowband ultraviolet-B (NB-UVB) persistent luminescence with a line emission at 313 nm has also been realized by introducing Gd3+ into LiLuSiO4:Pr3+,Sm3+ persistent phosphors based on persistent energy transfer from Pr3+ to Gd3+. Considering that the UVC and NB-UVB persistent luminescence can fully avoid severe interference from ambient light, the as-prepared LiLuSiO4:Pr3+,Sm3+ and Li(Lu,Gd)SiO4:Pr3+,Sm3+ persistent phosphors can find promising applications as invisible identification taggants in a bright environment.
研究领域:
材料科学
·
光化学
·
医学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 21
·1-15
·
IF 2.8
Yang Chong,Long Juling,Li Bin,Ma Rongbo,Cao Bin,Huang Weichao
A series of Sr 3 LiSbO 6 : Mn 4+ and Sr 3 LiSbO 6 : Mn 4+ , Sm 3+ red phosphors were synthesized using the high-temperature solid-state method. The phase, luminescence properties, and thermal stability of these phosphors were thoroughly investigated. The Sr 3 LiSbO 6 : Mn 4+ phosphors exhibited a strong far-red emission band ranging from 650 to 750 nm centered at 693 nm, which is attributed to the 4 E 2g → 4 A 2g transition of Mn 4+ . To further broaden the emission spectra of the Sr 3 LiSbO 6 : Mn 4+ phosphors, doping with Sm 3+ ions as a co-activator was performed. The Sr 3 LiSbO 6 : Mn 4+ , Sm 3+ phosphors exhibited two emission bands located at 601 nm and 693 nm (red and far red), which are well-matched with the absorption bands of phytochromes Red (P R) and phytochromes Far-Red (P FR) . Additionally, the emission intensity and thermal stability of the phosphors were improved. Sr 3 LiSbO 6 : Mn 4+ emits far-red light in the range of 650 nm-750 nm, while Sr 3 LiSbO 6 : Mn 4+ , Sm 3+ emits red light in the range of 500 nm-750 nm. In the context of Sr 3 LiSbO 6 : Mn 4+ , Sm 3+ , we designed a LED lamp for plant growth and carried out experiments on plant seed germination. The findings from these experiments demonstrate the positive impact of red LEDs on plant growth and development. Additionally, our results suggest the potential application of red phosphors with Sr 3 LiSbO 6 : Mn 4+ , Sm 3+ in plant growth.
研究领域:
材料科学
·
植物学
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2017
·
IF 3.473
Renping Cao,Changlin Liao,Fen Xiao,Guotai Zheng,Wen Hu,Yimin Guo,Yuanxiu Ye
A series of LiLaMo 2 O 8 :Eu 3+ , R (R = Bi 3+ and Sm 3+ ) phosphors are synthesized by a high temperature solid-state reaction method in air. The crystal structures, fluorescence lifetimes , and luminescence properties are investigated in detail. LiLaMo 2 O 8 :Eu 3+ phosphor with excitation 395 nm shows red light in the range of 525–725 nm and it photoluminescence intensity may be enhanced ∼2.35 times due to energy transfer (ET) from a sensitizing species (Bi 3+ or Sm 3+ ) to Eu 3+ ion after Bi 3+ or Sm 3+ ion is co-doped. The optimal Eu 3+ , Bi 3+ , and Sm 3+ ion concentrations are 4%. Luminous mechanism of LiLaMo 2 O 8 :Eu 3+ , R (R = Bi 3+ and Sm 3+ ) phosphors and ET processes between Eu 3+ and Bi 3+ /Sm 3+ ions are analyzed and explained by their excitation and emission spectra and energy level diagrams of Eu 3+ , Bi 3+ , and Sm 3+ ions. The experimental results indicate that LiLaMo 2 O 8 :Eu 3+ , R (R = Bi 3+ and Sm 3+ ) phosphors may be used as potenial red emitting materials for white light emitting diodes (LEDs) based on either a near ultraviolet (∼395 nm) or blue (∼465 nm) chip.
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 Frontiers
·
2023
·Vol. 10
·期 16
·4869-4880
·
IF 7
Ruiting Zhang,Yahong Jin,Yanmei Li,Haoyi Wu,Yihua Hu
Inorganic photochromic materials hold great scientific and technological promise in the field of optical information storage due to their numerous advantages, including an extended color change duration, exceptional fatigue resistance, and robust thermal stability. However, their practical application has been hindered by relatively slow coloring and bleaching rates. In this study, we present a P-type photochromic perovskite material, LiTaO3:Bi3+/Sm3+, with an ultra-fast optical response. LiTaO3:Bi3+/Sm3+ exhibits a rapid coloring time of approximately 25 seconds and an ultra-fast bleaching time of approximately 1 second, achieved through alternating 254 nm and 365 nm light irradiation. Notably, the photobleaching rate of LiTaO3:Bi3+/Sm3+ is currently the fastest among all reported inorganic photochromic materials. The prepared LiTaO3:Bi3+/Sm3+ material exhibits a maximum color change contrast of 26.49% and excellent fatigue resistance. The codopant Bi3+ plays a critical role in creating traps within the host lattice, which greatly enhances photochromism contrast and enables efficient long afterglow luminescence. These dual properties make the material suitable for dual-mode optical information storage in both bright and dark fields. Finally, the excellent optical properties of LiTaO3:Bi3+/Sm3+ are demonstrated in its application for erasable optical information storage vividly.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Kechen Zhang,Haojing Xu,Yuhe Shao,Zaisheng Wen,Ting Wang,Mingyue Chen,Zhen Song,Quanlin Liu
Achieving excitation-free, long-range target surveillance under complete darkness remains a critical challenge for night-vision technology. Here, a breakthrough is reported in near-infrared (NIR) persistent luminescence (PersL) materials designed specifically for this frontier. Through strategic bandgap engineering via Sm 3 ⁺ co-doping and In 3 ⁺ solid-solution incorporation in the novel Cr 3 ⁺-doped Mg 3 Ga 1.9 In 0.1 SnO 8 spinel phosphor, the afterglow intensity and duration are dramatically enhanced. The optimized material exhibits an ultra-long NIR PersL exceeding 168 h. Crucially, PDMS films embedded with this phosphor enabled real-time, persistent target detection at an unprecedented distance of 47.5 m in complete darkness, entirely without any external excitation source. This record-setting long-range performance demonstrates the material's potential as an enabling technology for passive, long-range nighttime surveillance systems. Comprehensive spectroscopic studies elucidate the underlying PersL mechanism. This work establishes a new pathway for designing ultra-long NIR PersL materials and paves the way for advanced applications in remote night-vision technologies.
研究领域:
材料科学
·
光学材料
·
光子学
·
夜视技术
·
远程传感
✓ 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）