Laser & Photonics Reviews
·
2021
·Vol. 15
·期 11
·2100317
·
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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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 106
·期 8
·5078-5085
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IF 3.9
Bingjun Liu,Bin Han,Na Yan,Min Sun,Guowu Tang,Hao Huang,Qi Qian,Zhongmin Yang
Single-crystal core multimaterial fibers have a wide range of applications in optics. Though some multimaterial fibers with single-element crystal cores have been manufactured successfully, the preparation of binary and multielement crystals is limited by segregation or stoichiometry deviation during the thermal drawing and recrystallization process. This paper presents a new method, several times recrystallization by laser, to solve the crystal segregation problem of binary or multielement crystal core multimaterial fibers.
研究领域:
光学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materiomics
·
2025
·
IF 9.6
Rundong Tian,Tianliang Zhou,Rong-Jun Xie
Laser-remote activated phosphor (LARP) converted solid state lighting is now developing towards high power density and super-brightness, and phosphor ceramic converters with high efficiency, high thermal conductivity, acceptable transmittance and suitable spectra are thus required. Y 3 Al 5 O 12 :Ce (YAG:Ce)-based ceramics are promising color converters to produce white light with a color temperature of 6000 K for vehicle headlamps, but the brightness and luminous efficiency are not well optimized. In this work, two series of Al 2 O 3 -YAG:Ce and Al 2 O 3 -(Gd,Y)AG:Ce transparent ceramics were fabricated by vacuum sintering, and their microstructure, thermal and optical properties were controlled by changing the Ce 3+ or Al 2 O 3 content as well the thickness of the ceramics. Both Al 2 O 3 -Y 2.925 Al 5 O 12 :Ce 0.0175 (AY0.0175) and Al 2 O 3 -(Gd 0.1 Y 2.89 )Al 5 O 12 :Ce 0.01 (AGY) ceramics containing 70% (in mass) Al 2 O 3 show a luminance saturation threshold of 30.3 W/mm 2 and 38.4 W/mm 2 , enabling to produce white light with a color temperature of 6000 K, luminous flux of 1928 lm and 3101 lm, luminous efficiency of 135.0 lm/W and 161.1 lm/W when pumped by blue laser diodes, respectively. This work provides a solution to finely control the composition, microstructure, and optical properties of transparent ceramics for super-high brightness laser-driven solid-state 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
Advanced Optical Materials
·
2022
·Vol. 10
·期 17
·2200836
·
IF 10.05
Hexin Chen,Tuan Lin,Fan Huang,Shuxing Li,Xueyuan Tang,Rong-Jun Xie
Green light is generally used as the transmitter of underwater wireless optical communication (UWOC) system, but the currently available light-emitting diode (LED)-based green light has a poor luminous flux density (i.e., low brightness) and a low wall-plug efficiency (WPE), known as the “green gap”. In this work, it is proposed to produce the laser-driven green light by using blue laser diodes to pump the narrow-band green-emitting β-Sialon phosphor-in-glass (PiG) film. The dominant wavelength of the laser-driven green light can be tuned in the range of ≈520–540 nm, required for UWOC, by controlling the phosphor content at ≈60–80% and the film thickness at ≈150–185 µm. By introducing highly reflective TiO 2 into the PiG film, the laser-driven green light exhibits a maximum luminous flux density of 1260 lm mm −2 under blue laser excitation with a power density of 15.49 W mm −2 . For UWOC application, the green light is demonstrated to have a modulation bandwidth of 1.76 MHz, a high WPE of 8.7%, and a long transmission distance of ≈61.6 m. This work suggests that the laser-driven high-brightness green light will be a promising light source for UWOC.
研究领域:
光学
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通信工程
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产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
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2021
·
IF 3.712
Yaqian Zhang,Jianming Liu,Yujie Zhang,Haisheng Yang,Yanxia Yu,Qingyun He,Xiaojuan Liang,Yongfu Liu,Weidong Xiang
At present, solid-state laser-driven lighting fabricated with blue laser diode (LD) and phosphor has been greatly developed in high-power lighting applications. The major obstacle is the luminescence saturation threshold of the fluorescence conversion material (YAG:Ce). In this work, we successfully prepared a series of high-quality and robust YAG:Ce single crystals . With high quantum efficiency (QE = 92%), regular crystal structure and high thermal conductivity , the single-crystal has excellent ability to deal with high radiation flux and thermal accumulation generated by high power. Matching the single-crystal with the laser, the luminous efficiency up to 274 lm/W and saturation threshold of 12 W/mm 2 were obtained. In addition, the influence of Ce doping concentration and sample processing conditions on the indicators in laser-driven white lighting was systematically studied. The results are of great significance and are believed to promote the development of solid-state laser-driven 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
Laser & Photonics Reviews
·
2022
·Vol. 16
·期 6
·2100722
·
IF 10.947
Taoli Deng,Linhui Huang,Shuxing Li,Qiangqiang Zhu,Le Wang,Takashi Takeda,Naoto Hirosaki,Rong-Jun Xie
Laser-driven solid-state lighting with super-brightness and compactness is recognized as a promising alternative to white light-emitting diodes. However, it is quite difficult to achieve laser-driven warm white light with long-term stability due to the shortage of robust orange- or red-emitting laser phosphors. In this work, an efficient and thermally robust orange-red (La,Y) 3 Si 6 N 11 :Ce 3+ (LYSN)-BN phosphor-in-glass (PiG) film is proposed to realize warm white light, where h -BN acts as an optical medium to enhance light scattering, a heat sink to reduce the temperature, and a protective layer to prevent LYSN from oxidation. The “LYSN+15 wt.% BN” PiG film shows an internal quantum efficiency of 70% and a luminance saturation threshold of 12.82 W mm −2 , much higher than those without h -BN (i.e., 57.5% and 7.63 W mm −2 ). A warm white light lamp fabricated by combining “LYSN+15 wt.% BN” PiG film with blue laser diodes, showing tunable correlated color temperatures (2800–5000 K), has a maximal luminous flux of 740 lm and a luminous efficacy of 133.5 lm W −1 , which promises high collimation and penetration lighting in the rainy or foggy weather. By designing a composite orange-red-emitting phosphor converter, this work lays a foundation for realizing high quality laser-driven warm white lighting source.
研究领域:
光学材料
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固态照明
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材料科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 26
·9014-9022
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IF 6.4
Simin Gu,Bomei Liu,Shuaichen Si,Jing Wang
Laser-driven lighting technology is a remarkable innovation in the field of solid-state lighting. High-efficiency white light sources have been commercially produced, but laser-driven near-infrared (NIR) light source has not yet been captured, which hindered the numerous optoelectronic applications such as NIR spectroscopy and imaging techniques. Inspired by the observation that laser-driven lighting could break the limited power density and achieve effective output optical power density under higher incident optical power density, here, a novel NIR MgO:Cr3+,Ni2+ phosphor-in-glass film was prepared and combined on the sapphire substrate to fabricate laser-driven NIR light source. The results show that laser-driven NIR light source based on blue laser and MgO:Cr3+,Ni2+ phosphor-in-glass film combination could achieve a NIR output optical power density of 5.3 mW mm−2, which is 5 times higher than LED-driven NIR light source based on the same MgO:Cr3+,Ni2+ phosphor-in-glass film. Finally, we successfully demonstrated the potential applications of the as-fabricated laser-driven NIR light source in the field of night vision and high-penetration imaging. This finding provides an approach to achieving high-performance NIR light sources thereby opening up a new avenue for the exploration of NIR spectroscopy technology.
研究领域:
光学
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材料科学
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光谱学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Huanyu Zhao,Jinsheng Li,Yan Jiang,Yao Lu,Lei Wang,Yi Xie,Wenlong Zhou,Yang Li,Xudong Sun
(Y,Ce) 3 Al 5 O 12 (YAG:Ce) ceramic is considered to be a suitable phosphor converter with a high quantum efficiency and excellent thermal stability for laser-driven lighting. However, the lack of red emission in the spectrum of YAG:Ce leads to the poor color quality of white light under excitation of laser diodes (LDs). Although current solutions were investigated to improve the color rendering index (CRI), they inevitably cause the decreased luminous efficacies (LE). How to balance the two luminous properties is still troubling researchers. In this study, a novel composite structure with large YAG:Ce grains surrounded by fine YAG:Cr grains was obtained by the two-stage hot-pressing process. The energy transfer between Ce 3+ and Cr 3+ was reduced because they were in different phases due to the structural design, thus improving the red emission while avoiding a sharp decline in the yellow emission. Moreover, there was no reaction and difference in thermal expansion coefficient between two phases due to the same matrix of YAG. Furthermore, the reflection loss in YAG:Cr‒YAG:Ce composite ceramic was reduced compared to layered-structure ceramics. Therefore, the maximal CRI reached 71.3 and the maximal LE was 255.8 lm/W, indicating an excellent application prospect in laser-driven 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 Advanced Ceramics
·
2022
·Vol. 11
·期 12
·1889-1900
·
IF 11.534
Peng Yang,Yu Zikang,Zhao Jiuzhou,Wang Qing,Liu Jiaxin,Sun Bo,Mou Yun,Chen Mingxiang
Multi-color phosphor-in-glass (PiG) film has been considered as a promising color converter in high-quality laser lighting owing to its outstanding merits of phosphor versatility, tunable luminescence, and simple preparation. However, the opto-thermal properties of PiG film are severely affected by the photon reabsorption and backward scattering of phosphor structure and the heat conduction of substrate. Herein, a unique sandwich design of phosphor structure was introduced in the multi-color PiG film for high-quality laser lighting. By elaborately synthesizing the borosilicate glass with low glass transition temperature ( T g ), similar expansion coefficient, and high refractive index (RI), the sandwiched PiGs were prepared by sintering (~600 °C) broadband green and red phosphor glass films on the double sides of sapphire. The green and red PiG films were tightly coated on the sapphire with no delamination and maintained higher luminescence intensity than raw phosphors at high temperatures. By simultaneously coupling photon reabsorption and backward scattering, the sandwiched green PiG film—sapphire—red PiG film (G—S—R PiG) yields a high-quality white light with a high luminous efficacy of 163 lm/W and an excellent color rendering index (CRI) of 85.4 under a laser power of 2.4 W, which are the best comprehensive results yet reported. Benefiting from the ingenious sandwich design with heat-conducting sapphire and thin PiG films, the G—S—R PiG displays low working temperatures (< 200 °C) under high-power laser excitation. This work reveals the role of sandwiched phosphor structure in photon loss and heat dissipation, which provides a new strategy to design PiG films for high-quality laser lighting.
研究领域:
光学材料
·
照明工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Huanyu Zhao,Jian Xu,Jinsheng Li,Shimeng Liu,Mu Zhang,Zhi Jiang,Xinrong Chen,Xudong Sun
The application of high-power laser-driven lighting is limited by the insufficient heat dissipation of phosphor converters and the poor color quality of white light. In this study, the Al 2 O 3 (Gd,Ce) 3 (Al,Ga) 5 O 12 (Al 2 O 3 GAGG:Ce) composite ceramics were designed to improve thermal performance of phosphors, while maintaining excellent color rendering under high-power laser excitation. Dense composite ceramics were fabricated by pre-sintering at 1600 °C in air followed by HIP at 1700 °C through the investigation of the phase evolution and sintering process. The emission spectrum of GAGG:Ce shows a red shift of 31 nm and a high full width at half maximum (FWHM) of 128 nm. Meanwhile, the thermal conductivity was increased to 13.2 W·m −1 K −1 by addition of Al 2 O 3 , which is 72% higher than that of single-phase GAGG:Ce ceramic. Therefore, warm white light with high color rendering index (CRI) of 71.4 and low correlated color temperature (CCT) of 4352 K was attained under excitation of high-power LDs.
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
Yue Qi,Renguang Ye,Youjie Hua,Lishuo Huang,Can Jin,Tianzhi Jiang,Jingtao Zhao,Muzhi Cai,Bingpeng Li,Gongxun Bai,Shilong Zhao,Junjie Zhang,Shiqing Xu
High-brightness and high-power laser lighting technology driven by blue laser diodes requires the development of thermally stable fluorescent conversion materials. Phosphor-in-glass-ceramics offers promising solutions for laser lighting applications due to their ease of synthesis and excellent thermal stability. In this study, Na 2 O-CaO-SiO 2 (NCS) glass matrix and LuAG phosphor were combined and processed using spark plasma sintering (SPS) at 600 °C to fabricate phosphor-in-glass (PIG). By controlling the crystallization process, LuAG phosphor-in-glass-ceramics (PIGC) incorporating Na 4 Ca 4 Si 6 O 18 microcrystals with a high crystallization degree of 89.5% and excellent luminescent properties was successfully prepared. Compared to LuAG-PIG, the luminous flux of LuAG-PIGC has risen by 43% under laser irradiation. LuAG-PIGC achieves the LF of 910.3 lm and the LE of 316.8 lm/W. Under an excitation of 3.35 W, he PIGC sample exhibited a surface temperature of 169.3 °C, which was 92 °C lower than that of the PIG sample without the use of an external heatsink. These results indicate that LuAG-PIGC possesses excellent thermal stability and has significant potential as novel fluorescent conversion materials for laser lighting 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
ADVANCED MATERIALS
·
2024
·Vol. 36
·期 52
·2413857
·
IF 27.4
Weibin Chen,Yuzhen Wang,Gaochao Liu,Chaojie Li,Zhiguo Xia
Ultrabright broadband near-infrared (NIR) phosphor-converted laser diode (pc-LD) as a light source is increasingly essential for improving the sensitivity and spatial resolution of intelligent NIR spectroscopy technologies. However, the performance of NIR pc-LD is greatly hindered by the low external quantum efficiency (EQE) and poor thermal resistance of phosphor materials. Herein, a highly stable phosphor-in-ceramic (PiC) film deposited on high thermal conductivity substrate, in which the NIR-emitting Ca 3 MgHfGe 3 O 12 :Cr 3+ phosphor is incorporated into a glass-crystallized Ca 3 Ga 2 Ge 3 O 12 ceramic matrix, along with the formation of a new type PiC composite material with high efficiency, absorbance, and thermal conductivity, is designed and prepared. The obtained PiC exhibits an impressive EQE of 57.7%, high thermal conductivity of 17.1 W m −1 K −1 , and the PiC wheel demonstrates a broadband NIR emission exceeding 5 W when excited by a 450 nm laser. Finally, a groundbreaking electrically driven pc-LD device based on PiC achieves 1.6 W of NIR output, enabling multiple intelligent spectroscopy applications in archaeology and night vision imaging. This work paves the way for advancing broadband NIR light sources in a diverse range of photonic applications.
研究领域:
光学材料
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光电子学
·
智能传感技术
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）