JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Minghui Zhou,Jun Sun,Bei Zhang,Youjie Hua,Feifei Huang,Hongping Ma,Renguang Ye,Shiqing Xu
Phosphor-in-ceramic (PiC) has garnered considerable attention in high-power white laser lighting owing to its advantages, such as high efficiency and good thermal stability. In this study, a transparent hydroxyapatite (HA) ceramic was successfully prepared via spark-plasma sintering (SPS) under relatively mild conditions. A series of ultra-high efficiency green-emitting PiCs were obtained by pure HA ceramics with 1–12% Lu 3 Al 5 O 12 : Ce (LuAG) phosphors. Owing to the rapid sintering of SPS and the stability of HA ceramics, HA ceramic matrix has high transparency, and does not damage the crystal structure of the LuAG phosphor. When excited by a blue laser, the HA-LuAG PiC exhibited an excellent luminous efficacy of 300.48 lm·W −1 . The fluorescence saturation threshold of the laser power was approximately 7.90 W. These results demonstrate that HA-LuAG PiCs have great potential for applications as efficient green-emitting phosphor conversion materials for high-power laser lighting.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2015
·Vol. 3
·期 31
·8132-8141
·
IF 4.696
W. B. Dai,S. Ye,E. L. Li,P. Z. Zhuo,Q. Y. Zhang
Yellow-emitting phosphors activated by Ce3+ are key components of white light-emitting diodes (LEDs) based on the blue (Ga,In)N LED. The need to replace incandescent and/or halogen lamps with warm white LEDs has driven LED phosphor development toward compositions beyond the Ce3+-doped garnets used in cool white LED packages. In this contribution, for pointing out how chemical substitutions play a crucial role in tuning the optical properties, we investigate the structural and optical properties of oxyfluoride solid-solutions and borate phosphors, specifically the (La,Ca)3(Al,Si)O4(O,F):Ce3+ yellow-green phosphors and the Ca3La3(BO3)5:Eu3+ red phosphors, via a combination of density functional theory, synchrotron X-ray detection, pair-distribution-function analyses and spectroscopy measurements. By incorporating these phosphors with a new phosphor-capping method on InGaN light-emitting diodes, we obtain the warm white light that meets the spectral and efficiency requirements for high-efficacy solid state warm white lighting lamps. We believe that solid-solutions between distinct and structurally related phosphor systems can be a good strategy to broaden possibilities for using in warm white LED phosphors.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
SUPERLATTICES AND MICROSTRUCTURES
·
2015
·
IF 2.097
Renping Cao,Haidong Xu,Dedong Peng,Shenhua Jiang,Zhiyang Luo,Wensheng Li,Xiaoguang Yu
Novel CaWO 4 :Eu 3+ , Mn 2+ red phosphor is synthesized by solid-state reaction method in air. CaWO 4 :Eu 3+ , Mn 2+ phosphor with excitation 268 and 394 nm emits red light with chromaticity coordinates (x = 0.6403, y = 0.3593). The strongest emission bands peaking at ∼615 nm is attributed to 5 D 0 → 7 F 2 of Eu 3+ ion. Strong excitation band peaking at ∼394 nm indicates that the phosphor may be excited by near UV (∼394 nm) chip. Emission intensity of CaWO 4 :Eu 3+ , Mn 2+ phosphor with excitation 268 nm is ∼2 times stronger than that of CaWO 4 :Eu 3+ phosphor owing to energy transfer between Eu 3+ ion and Mn 2+ ion. Energy transfer from WO 4 2 − group and Eu 3+ ion to Mn 2+ ion in CaWO 4 :Eu 3+ , Mn 2+ phosphor may be explained via luminescence properties. Luminous mechanism is analyzed by energy level diagrams of WO 4 2 − group, Mn 2+ and Eu 3+ ion. The paper content is helpful to develop and research other novel phosphors.
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
·
2025
·
IF 5.1
Yi Lin,Gaoming Dong,Hang Lin,Bo Wang,Pengfei Wang,Ju Xu,Yao Cheng,Yan Xiong,Yuansheng Wang
The rise of laser diode (LD)-driven phosphor-converted near-infrared (NIR) lighting sources, offering unparalleled advantages in terms of brightness and imaging resolution, is hindered by a scarcity of color converters possessing desired properties. Herein, we synthesized a new Ca2YScAl2Si2O12:Cr3+ (CYSAS:Cr3+) broadband NIR-emissive garnet phosphor with a full width at half maximum (FWHM) of 165 nm, attributed to the presence of Cr3+ ions at two distinct crystallographic sites in CYSAS as verified through spectroscopic analyses. With the aid of a rapid infrared firing technique pioneered in our lab, a phosphor-in-glass film (PiGF) composite was then successfully sintered onto a sapphire plate (SP), showing minimal interfacial reactions during co-sintering and thus retention of luminescent properties. The saturation behavior of luminescence under intense blue laser irradiation was meticulously examined across different excitation modes. By incorporating a “phosphor wheel”, we achieved a peak NIR output power of 2626 mW (@17 W or 21.7 W mm−2), surpassing the majority of previously reported phosphor-converted lighting sources. The demonstration experiments highlighted the potential applications of the engineered laser-driven NIR light source in non-destructive detection, quantitative analysis of organic components, night vision and biological imaging.
研究领域:
材料科学
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光学工程
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激光技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Sijin Zhang,Shujie Gai,Xiaojuan Zhang,Mao Xia,Zhi Zhou,Xiao Cheng,Maohai Yao,Maxim S. Molokeev,Qiuju Feng
Red and far-red emitting phosphors have been widely used in phosphor-converted light emitting diode (pc-LED) devices to provide lighting for indoor plant growth, thus achieving desired product qualities. Among the many ways to optimize phosphors’ optical performance, cationic substitution is one of the most effective methods. In this study, red phosphors (Li 2 MgTi 1- x - y O 4 : x Mn 4+ , y Ge 4+ ) were synthesized by high temperature solid state method and the optical performance of phosphors were improved with increasing Ge 4+ constituents. In particular, luminescence intensity of Li 2 MgTiO 4 : 0.002Mn 4+ , 0.1Ge 4+ increased by 152% under 468 nm excitation, and the thermostability of emission intensity increases from 22% ( y = 0) to 43% ( y = 0.1), which is about twice as much. Finally, pc-LED device was fabricated via the red phosphor Li 2 MgTiO 4 : 0.002Mn 4+ ,0.1Ge 4+ coated on a 470 nm ultraviolet chip. By changing the proportion of the phosphor, the electroluminescence spectra of pc-LED device could match well with the absorption regions of plant pigments. Therefore, Li 2 MgTiO 4 : 0.002Mn 4+ , 0.1Ge 4+ phosphor has potential application in plant lighting. Furthermore, this work can offer some helpful references for improving luminescent efficiency by simply modulating the chemical composition.
研究领域:
材料科学
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光学
·
农业工程
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2020
·Vol. 8
·期 23
·2000976
·
IF 8.286
Yayun Zhou,Changkai Yu,Enhai Song,Yuanjing Wang,Hong Ming,Zhiguo Xia,Qinyuan Zhang
Narrow-band red-emitting fluoride phosphors play a crucial role in lighting and backlight displays, whereas the stability issue is a major challenge. Here, highly stable K 2 SiF 6 :Mn 4+ (KSFM) single crystal phosphors with tunable sizes (20–1000 µ m) are grown by a facile saturated crystallization method. The small specific surface area together with the unique Mn 4+ -rare interface layer in KSFM single crystals enables the simultaneous fulfillment of high external quantum efficiency, excellent moisture, improved thermal quenching, and dissipation for high-power and laser-driven lighting applications. As a prototype, a warm white laser diode device with a high luminous flux of 202.7 lm and correlated color temperature of 3277 K, as well as a color rendering index of 87.9 is presented. This work provides new insights into the development of highly efficient and stable materials for advanced lighting applications.
研究领域:
材料科学
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光学工程
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发光材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 28
·期 1
·582-587
·
IF 1.798
Cao Renping,Wang Wudi,Zhang Jinlong,Hu Qianglin,Jiang Shenhua,Xiao Fen,Ye Yuanxiu
CaZr(PO 4 ) 2 :Mn 2+ and CaZr(PO 4 ) 2 :Mn 2+ , Sm 3+ phosphors are synthesized by high-temperature solid state reaction method in air. CaZr(PO 4 ) 2 :Mn 2+ phosphor shows green emission and its broad emission band peaking at ~545 nm within the range 470–650 nm is attributed to the 4 T 1 (G) → 6 A 1 ( 6 S) transition of Mn 2+ ion. The optimal Mn 2+ doping concentration is ~5 mol% in CaZr(PO 4 ) 2 :Mn 2+ phosphor. CaZr(PO 4 ) 2 :Mn 2+ , Sm 3+ phosphor with excitation 399 nm emits reddish-orange light, and it shows a systematically varied hue from green to yellow with excitation 405 nm by changing Sm 3+ and Mn 2+ ions concentration. The luminous mechanism of CaZr(PO 4 ) 2 :Mn 2+ , Sm 3+ phosphor is analyzed and explained by the simplified energy level diagrams of Mn 2+ and Sm 3+ ions in CaZr(PO 4 ) 2 :Mn 2+ , Sm 3+ phosphor. The experimental results are helpful to develop new Mn 2+ /Sm 3+ -doped materials.
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. 11
·期 4
·1530-1540
·
IF 8.067
Shisheng Lin,Hang Lin,Pengfei Wang,Ping Sui,Hongyi Yang,Ju Xu,Yao Cheng,Yuansheng Wang
Phosphor-converted white laser diode (pc-wLD) technology requires high-color-quality white light, which involves the development of an efficient red-emitting phosphor color converter. With regard to this, we have developed a new kind of orange-yellow-emitting Lu2−xMg2Al2−yGaySi2O12:xCe3+ (LMAGS:Ce3+) solid-solution phosphor, which shows the desired abundant red-emissive components and nanosecond-range luminescent decay. LMAGS:Ce3+ is further compounded into an all-inorganic phosphor-in-glass (PiG) composite tightly bonded to a high-thermal-conductivity sapphire plate (SP) in the form of a film. There is no obvious interfacial reaction between phosphor and glass during co-sintering, which ensures good luminescent properties are retained. A comparative study was conducted to reveal the microstructure–property relationship and the key influencing factors of luminescence saturation upon being driven by a blue laser. “One-dimensional photonic crystal film” and “phosphor wheel” designs were adopted to further enhance the luminescent performance, successfully improving the luminous flux of the generated white light to 393.8 lm @ 5 W mm−2 under static–transmissive excitation mode and 1080 lm @ 20 W mm−2 under rotatory–reflective excitation mode. Probing into the luminescence saturation mechanism, the effects of thermal saturation and optical saturation were demonstrated, accounting for 44.0% and 56.0% contributions, respectively. A fabricated prototype neutral/warm-white LD lighting source based on LMAGS:Ce3+ PiG film-on-SP shows high light collimation and comfortable visual perception, demonstrating the bright application potentials of the developed composite material.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2013
·
IF 1.977
Renping Cao,Kaniyarakkal N. Sharafudeen,Jianrong Qiu
Red-emitting SrMgAl x O 17±δ : y Mn 4+ composite phosphors ( x = 10–100; y = 0.05–4.0 mol%) are synthesized by solid-state reaction method in air. Addition of Al 2 O 3 leads to the formation of two concomitant phases, i.e., SrMgAl 10 O 17 and Al 2 O 3 phases in the composite phosphor. Red emission from Mn 4+ ions in the composite phosphors is greatly enhanced due to multiple scattering and absorption of excitation light between SrMgAl 10 O 17 and Al 2 O 3 phases. SrMgAl x O 17±δ : y Mn 4+ composite phosphors would be a promising candidate as red phosphor in the application of a 397 nm near UV-based W-LED.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
J. Zhang,Z.Y. Ma,J.G. Guo,G.M. Cai,L. Ma,X.J. Wang
Color-tunable phosphors based on a single host are superior to traditional mixed primary-color phosphors in fluorescent lamps, due to the better consistency of different color components in service. In this work, a series of Eu 3+ /Tb 3+ doped MgIn 2 P 4 O 14 phosphors were synthesized by a conventional solid state reaction method. The phosphors exhibit strong absorption around 254 nm with negligible absorption in the visible light region. Under the joint action of the co-activation, cross-relaxation, sensitization, and phonon-assistance, color-tunable reddish-orange-yellow-green-blue emission is achieved in MgIn 2 P 4 O 14 : Eu, Tb phosphors by adjusting the doping content, which demonstrates great potential for the application in fluorescent lamps.
研究领域:
材料科学
·
无机化学
·
光电子学
·
发光材料
·
固体物理
✓ 已验证
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2024
·
IF 4.1
Shen-Ao Hu,Yu-Guo Yang,Qian Du,Xiao-Na Shen,Xu-Ping Wang,Qing-Gang Li,Cheng-Cheng Qiu,Hua-Jian Yu,Lei Wei,Xian-Shun Lv,Yuan-Yuan Zhang,Ji-Yang Wang,Rui Zhang,Bing Liu
We prepared BaLaGa 3 O 7 : Bi 3+ ,Sm 3+ phosphors via solid state reactions and investigated their crystallinity, lattice occupancy, and photoluminescence performance. The phase and crystal structure, morphology and size, as well as element composition of phosphor were investigated via a series of measurements. The photoluminescence and Bi 3+ → Sm 3+ energy transfers were investigated in detail. It is proved that Bi 3+ → Sm 3+ energy transfer occurs in Bi 3+ /Sm 3+ codoped BaLaGa 3 O 7 phosphors and it is induced by dipole–dipole interaction. By calculating the decay lifetime, the efficiency of Bi 3+ → Sm 3+ energy transfer is evaluated. The CIE coordinates of the prepared show obvious dependence on Sm 3+ concentration and temperature.
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 ALLOYS AND COMPOUNDS
·
2015
·
IF 2.999
DeCai Huang,YouFu Zhou,WenTao Xu,Kun Wang,Zhuguang Liu,MaoChun Hong
Non-rare-earth-metal Mn 2+ and Eu 2+ co-doped BaSi 3 O 4 N 2 phosphors were synthesized by solid state reaction method. The effect of Mn 2+ concentration upon photoluminescence behavior was investigated systematically. The specimens were efficiently excited from UV to visible region. The green emission of Eu 2+ was greatly enhanced by Mn 2+ due to the co-excitation and energy transfer between Mn 2+ and Eu 2+ . The energy transfer probability from Mn 2+ to Eu 2+ depends strongly on the concentration of Mn 2+ with the maximum at 6 mol%. Furthermore, corresponding quantum efficiency and thermal stability were dramatically improved. Through the assembly of as-prepared green phosphor, YAG:Ce 3+ and Sr 2 Si 5 N 8 :Eu 2+ phosphors with 460 nm InGaN chip, a broad range of white light was obtained bearing with color temperature of 3585–3650 K and color-rendering index of 95–98, exhibiting an attractive candidate for the application in phosphor converted light-emitting diodes (pc-LEDs).
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
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