Industry-friendly synthesis and high saturation threshold of a LuAG:Ce/glass composite film realizing high-brightness laser lighting

Xu, Jian; Yang, Yang; Wang, Jian; Du, Baoli; Santamaría, Adrián A.; Hu, Baofu; Ji, Haipeng; Dam-Hansen, Carsten; Jensen, Ole Bjarlin

doi:10.1016/j.jeurceramsoc.2020.06.074

Cited by 35 publications

(19 citation statements)

References 32 publications

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“…The interfacial reaction of the glass with the LSN phosphor and the reabsorption of the sapphire substrate lead to a slight decrease in IQE. 23,35 The ultrahigh IQE ensures the excellent luminous performance of LSN PiF. Furthermore, it can be obtained from Figure S2, that the transmittance of the sapphire substrate can reach 86% in the visible light range.…”

Section: ■ Introductionmentioning

confidence: 93%

Design of a Novel La₃Si₆N₁₁:Ce³⁺ Phosphor-in-Glass Film for High Power Laser Lighting: Luminous Efficiency toward 200 lmW^–1

Wang

et al. 2022

ACS Sustainable Chem. Eng.

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Inorganic fluorescent glass films have been widely considered in the field of high power laser lighting because of their excellent comprehensive properties as fluorescent conversion materials. Herein, we adjust the optimum sintering temperature to prepare a series of La 3 Si 6 N 11 :Ce 3+ phosphor-in-glass films (LSN PiFs) with excellent optical properties on a single sapphire structure. The prepared LSN PiF has ultrahigh internal quantum efficiency (IQE) (98%) and excellent thermal stability. The thermal conductivity at room temperature can reach 9.8 Wm −1 K −1 . When the temperature is 100 °C, the fluorescence intensity can still be maintained. The LSN:Ce phosphor particles did not react with the glass matrix and retained the original luminescence properties. Moreover, by further adjusting the concentration and thickness of LSN PiF, the luminous flux and luminous efficiency of LSN PiF under optimal conditions can reach 1071.73 and 207.58 lmW −1 under the excitation of 460 nm, which is the optimal result reported so far. In addition, the color rendering index (CRI) and low color temperature (CCT) are 64.05 and 5612.6 K, respectively, and the color coordinates are all close to the white light region. All the results show that LSN PiF has great application prospects in the high quality and high brightness laser lighting field.

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Section: ■ Introductionmentioning

confidence: 93%

Design of a Novel La₃Si₆N₁₁:Ce³⁺ Phosphor-in-Glass Film for High Power Laser Lighting: Luminous Efficiency toward 200 lmW^–1

Wang

et al. 2022

ACS Sustainable Chem. Eng.

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“…[3,4,5] At present, garnet phosphors, with an emission maximum in the range of 520-570 nm, are broadly used as color converters in laser-driven lighting, which usually produce cool white light with a correlated color temperature (CCT) >6000 K and a color rendering index (CRI) <65. [6,7,8,9] However, the cool white light cannot be used in some special lighting fields, such as airport lamps, sailing lamps, and headlights, where the light is required to realize greater penetration and longer irradiation distance in the foggy or rainy weather. To compensate for the orange spectral component, red phosphors, such as Sr 2 Si 5 N 8 :Eu 2+ and CaAlSiN 3 :Eu 2+ , were usually employed.…”

Section: Introductionmentioning

confidence: 99%

Thermally Robust Orange‐Red‐Emitting Color Converters for Laser‐Driven Warm White Light with High Overall Optical Properties

Deng

Huang

et al. 2022

Laser & Photonics Reviews

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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)3Si6N11:Ce3+ (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.

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“…The combination of yellow Ce 3+ : Y 3 Al 5 O 12 (Ce:YAG) phosphors and blue InGaN/GaN chip is the most common method to obtain WLEDs [4][5][6]. However, the further development of WLEDs is limited by the traditional phosphor-converter phosphors-in-silicones (PiSs) [7][8][9], because PiSs have problems such as thermal quenching of phosphors and degradation of resin at high temperature. Meanwhile, phosphors-in-glass (PiGs) with good heat dissipation and high heat resistance are a suitable phosphor-converter for high power WLEDs lighting [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

A Novel Preparation of Special-Shaped Phosphors-in-Glass by Gel Casting with Isobam for High-Power WLEDs Lighting

et al. 2022

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Phosphors-in-glass (PiGs) regarded as a promising phosphor-converter for white light emitting diodes (WLEDs) is being researched widely. However, there are few reports on the effect of changing the shape of PiGs on the color rendering index (CRI) and heat dissipation of WLEDs. In this paper, gel casting with Isobam was first attempted in preparing special-shaped PiGs successfully. It exhibited that 76 wt.% was the optimum solid content based on the rheological properties of slurry and the shrinkage of green bodies. The sintering rate should be kept at a low speed and glass transition temperature (Tg) of glass powders must be higher than sublimation temperatures (Ts) of APS and Isobam. The CRI of PiGs was increased by about 27% after changing the shape of PiGs from cylinder to dome. Most importantly, operating temperature also reduced effectively the increase of the surface area of PiGs. Therefore, changing the shape of PiGs by gel casting with Isobam is a creative way for high-power WLEDs lighting.

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Industry-friendly synthesis and high saturation threshold of a LuAG:Ce/glass composite film realizing high-brightness laser lighting

Cited by 35 publications

References 32 publications

Design of a Novel La₃Si₆N₁₁:Ce³⁺ Phosphor-in-Glass Film for High Power Laser Lighting: Luminous Efficiency toward 200 lmW^–1

Design of a Novel La₃Si₆N₁₁:Ce³⁺ Phosphor-in-Glass Film for High Power Laser Lighting: Luminous Efficiency toward 200 lmW^–1

Thermally Robust Orange‐Red‐Emitting Color Converters for Laser‐Driven Warm White Light with High Overall Optical Properties

A Novel Preparation of Special-Shaped Phosphors-in-Glass by Gel Casting with Isobam for High-Power WLEDs Lighting

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Industry-friendly synthesis and high saturation threshold of a LuAG:Ce/glass composite film realizing high-brightness laser lighting

Cited by 35 publications

References 32 publications

Design of a Novel La3Si6N11:Ce3+ Phosphor-in-Glass Film for High Power Laser Lighting: Luminous Efficiency toward 200 lmW–1

Design of a Novel La3Si6N11:Ce3+ Phosphor-in-Glass Film for High Power Laser Lighting: Luminous Efficiency toward 200 lmW–1

Thermally Robust Orange‐Red‐Emitting Color Converters for Laser‐Driven Warm White Light with High Overall Optical Properties

A Novel Preparation of Special-Shaped Phosphors-in-Glass by Gel Casting with Isobam for High-Power WLEDs Lighting

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Design of a Novel La₃Si₆N₁₁:Ce³⁺ Phosphor-in-Glass Film for High Power Laser Lighting: Luminous Efficiency toward 200 lmW^–1

Design of a Novel La₃Si₆N₁₁:Ce³⁺ Phosphor-in-Glass Film for High Power Laser Lighting: Luminous Efficiency toward 200 lmW^–1