Laser & Photonics Reviews
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2021
·Vol. 15
·期 11
·2100317
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IF 13.138
Xiangming Yue,Ju Xu,Hang Lin,Shisheng Lin,Renfu Li,Bo Wang,Qiugui Huang,Pengfei Wang,Ping Sui,Yao Cheng,Yuansheng Wang
The green-emissive laser phosphor is urgently demanded for projection displays to compensate the “Green Gap.” Herein, the well-known β-SiAlON:Eu 2+ with admirable luminescent feature is incorporated into robust silicate glass matrix, cosintered on sapphire plate, and then constructed into “phosphor wheel,” succeeding in retaining excellent green-emissive performance and meanwhile relieving the luminescence droop at high pumping density of blue laser. Probing the local effect of laser–matter interaction reveals that the luminescence saturation is majorly determined by thermal quenching, but the influence of intensity quenching cannot be ignored. Systematical works are performed to optimize glass composition, cosintering procedure, sample parameters, and optical path, turning out the maximal quantum efficiency of 60%, thermal conductivity of 9.5 W m −1 K −1 , and high saturation threshold far beyond 22 W mm −2 . In a proof-of-concept experiment, accompanied with red laser diode, the constructed light engine yields a high brightness with luminous flux of 1310 lm (luminance of 880 Mcd m −2 ), a low étendue of ≈1.5 mm 2 , and a wide color gamut of 112.5% National Television System Committee (NTSC), demonstrating the composite material as an efficient laser-driven color converter for projection displays.
研究领域:
材料科学
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光学工程
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显示技术
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高影响因子
Science China-Materials
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2025
·Vol. 68
·期 6
·1822-1829
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IF 7.4
Kuang Yuhang,Chen Weibin,Wang Yuzhen,Sun Yongsheng,Jin Jiance,Xia Zhiguo
Laser phosphor display (LPD) technology has attained considerable attention due to its high brightness, wide-gamut, and non-speckle characters. However, it is challenging to develop laser-resistant bulk luminescent materials with narrow-band emissions for LPD applications. Herein, we present a general strategy to fabricate stable phosphor-glass composites (PGCs) containing commercial red-emitting K 2 SiF 6 :Mn 4+ (KSF:Mn 4+ ) and green-emitting β -SiAlON:Eu 2+ with high internal quantum efficiencies of 94.6% and 87.8%. Thereupon, “phosphor wheels” of the two PGCs achieve high luminous flux and efficiency for KSF:Mn-PGC (684 lm, 21 lm W −1 mm −1 ) and β -SiAlON:Eu-PGC (4770 lm, 172 lm W −1 mm −1 ), respectively, by mitigating thermal accumulation. Finally, we integrate these two PGCs into a patterned phosphor wheel, which covers 125% of the Rec. 709 standard, far exceeding that of the present YAG:Ce-based laser light sources (103%). Our work paves the way for adapting commercial phosphors in bulk PGC materials to improve their stability and further promote LPD development and new types of display applications.
研究领域:
材料科学
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光学工程
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高影响因子
RSC Advances
·
2017
·Vol. 7
·期 52
·32982-32988
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IF 3.108
Hailong Wang,Zhiping Yang,Zhijun Wang,Xiuqin Dong,Dong Wei,Zhenling Li,Miaomiao Tian
In this study, the influences of different aid-sintering additives on the synthesis of β-SiAlON:Eu2+ phosphor were investigated. The aid-sintering additives include oxides, fluorides, chlorides, and carbonates. The β-SiAlON:Eu2+ phosphor, synthesized using different additives, was investigated in detail via spectroscopic data, X-ray diffraction, quantum efficiency, and scanning electron microscopy; the particle morphology and spectroscopic properties improved with the addition of different additives. Different additives have different influences on the morphology of β-SiAlON:Eu2+. Most oxide additives increase the diameter of β-SiAlON:Eu2+. Most fluoride additives increase the length of β-SiAlON:Eu2+. Particles with different morphologies can be obtained by adjusting the quantities of the oxide and fluoride additives. When combined with red phosphors, β-SiAlON:Eu2+ will produce wider color gamut backlights than the traditional yttrium aluminum garnet.
研究领域:
材料科学
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荧光粉化学
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固态照明
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陶瓷材料
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光电功能材料
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高影响因子
Laser & Photonics Reviews
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2026
·
IF 9.7
Xinyu Zhang,Wanyuan Li,Lin Huang,Bo Wen,Shuxing Li,Rong-Jun Xie
Laser-driven projection displays promise a large screen size, high brightness, and speckle-free, but are greatly limited by the “green gap” and low color gamut. To address these issues, much narrower-band and high-efficiency green converters are required. In this work, we synthesized green-emitting β-Si 5.97 Al 0.03 O 0.03 N 7.97 :Eu 2+ with an emission maximum of 527 nm, full width at half maximum of 42.95 nm, and external quantum efficiency of 41.4%, by using NaF additives to eliminate the lattice oxygen. By co-sintering it with glass frits on an aluminum substrate to fabricate phosphor-in-glass films at 430°C for 20 min, which inherit the excellent luminescence and stability of phosphor without detectable interfacial reactions. The optimized PiG film-coated phosphor wheel was prepared to eliminate thermal effects, and showed outstanding laser irradiation resistance, reaching a luminous flux of 3849.43 lm @32.53 W mm −2 and a luminous efficacy of 101.46 lm W −1 . The advanced laser phosphor display prototype achieves a color gamut as high as 90.92% Rec.2020. These results demonstrate the strong potential of the β-Si 5.97 Al 0.03 O 0.03 N 7.97 :Eu 2+ phosphor for accelerating the advancement of laser-driven projection displays technology.
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高影响因子
MATERIALS RESEARCH BULLETIN
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2013
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IF 1.913
Lin Gan,Zhi-Yong Mao,Xiong-Hui Zeng,Yu-Qiang Zhang,Yang Zhao,Fang-Fang Xu,Ying-Chun Zhu,Xue-Jian Liu
Eu 2+ -doped SiAlON phosphors with the composition of Eu x Si 6− z Al z O z N 8− z (0.5 ≤ z ≤ 3) at a fixed x = 0.01 were synthesized by the gas pressure sintering method. Dependence of luminescence properties on the phase compositions in β-SiAlON:Eu 2+ phosphors has been examined via fluorescence microscope and scanning electron microscope equipped with a cathodoluminescence spectrometer and an energy dispersive spectrometer. Bimodal emission (green and violet) from β-SiAlON phase is observed in the samples with z ≥ 2, indicating co-existence of two different kinds of coordination for Eu 2+ ions in the host lattice.
研究领域:
材料科学
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光学
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高影响因子
JOURNAL OF LUMINESCENCE
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2015
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IF 2.719
Qian Liu,Qi Lu,Guanghui Liu,Qinhua Wei
β-SiAlON:Eu 2+ phosphors synthesis usually requires higher temperatures and higher nitrogen pressure conditions. In the present research, a low temperature technique has been developed to synthesize both β-SiAlON and Eu-doped β-SiAlON fibers by electrospinning combined with carbothermal reduction nitridation (CRN). The carbon sources used as reductant in CRN procedure have been optimized to effectively produce a well-crystallized β-SiAlON phase at lower temperatures of 1370–1500 °C. Additionally, through adding sucrose and covering activated carbon powders on the top of fiber precursor layers, the highly-pure β-SiAlON and β-SiAlON:Eu 2+ fibers could be obtained. The pyrolysis behavior of fiber precursors, crystalline phase, morphology, and UV excited luminescence properties of the produced ceramic fibers were also studied by using TG–DSC measurement, XRD analysis , SEM observation, and spectrometer method. The resultant fibers exhibit a smooth surface and an uniforme morphology with a substantial length. Moreover, the β-SiAlON:Eu 2+ fibers thus prepared show a blue light emission peaked at 470 nm under UV excitation.
研究领域:
材料科学
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光学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）