AlN–Ce-doped yttrium aluminum garnet composite ceramic phosphor for high-power laser lighting

Fujioka, Kana; Yagasaki, Kenta; Sawada, Takuya; Minemoto, H.; Fuji, Hiroshi; Yamamoto, Kazuhisa

doi:10.1016/j.optmat.2021.111507

Cited by 23 publications

(9 citation statements)

References 39 publications

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“…In addition, there are many studies have indicated that thermal performances and optical properties of materials under laser irradiation can be upgraded by adding a high TC medium. [28][29][30] In recent years, Al 2 O 3 -YAG: Ce, [31][32][33][34][35][36][37] hBN-YAG: Ce, [38] MgAl 2 O 4 -YAG: Ce, [39] AlN-YAG: Ce [40,41] have been systematically investigated by many researchers. Here, we attempt to add micrometer BN which possesses the merits of environmentally friendly, low cost and ultrahigh TC (33 W m −1 K −1 ) into Ce: GdYAG PiG films as light scattering center to increase heat dissipation and porosity, further improving the optical and thermal performances under blue laser irradiation.…”

Section: Doi: 101002/lpor202200585mentioning

confidence: 99%

Realizing High‐Power Laser Lighting: Artfully Importing Micrometer BN into Ce: GdYAG Phosphor‐in‐Glass Film

Wang

Liu

et al. 2022

Laser & Photonics Reviews

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Phosphor-in-glass (PiG) film has been proposed as an ideal color converter in laser diodes (LDs) lighting for its advantages of outstanding thermal conductivity (TC) and superior efficiency. Herein, yellow-emitting Y 1.31 Ce 0.09 Gd 1.6 Al 5 O 12 (Ce: GdYAG)-PiG composite films are successfully elaborated through a practical blade-coating approach. Systematical studies are performed on its microstructure, thermal stability, and luminescence performance pumped by LDs. Noteworthy, the highest internal quantum efficiency of film (94.2%) retains 97.1% of the raw phosphors (97%). Particularly, by further introducing micrometer BN with high TC as light scattering center to enhance heat dissipation and increase porosity, the thermal and optical properties of the sample are greatly improved. The luminescence intensity of the sample at 423 K is increased to 1.8 times that at 298 K. The thermal diffusion (TD) and TC of the sample are increased from 1.571 to 4.227 mm 2 s −1 and 6.4 to 13.0 W m −1 K −1 , respectively. At the same time, the maximum saturation threshold under laser irradiation of Ce: GdYAG + micrometer BN composite film is raised from 3.12 to 5.42 W mm −2 and 260.6 to 354.1 lm, respectively. The combination of excellent optical and thermal performances, coupled with facile and low-cost synthetic strategy, could push forward the practical application in solid-state laser lighting.

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Section: Doi: 101002/lpor202200585mentioning

confidence: 99%

Realizing High‐Power Laser Lighting: Artfully Importing Micrometer BN into Ce: GdYAG Phosphor‐in‐Glass Film

Wang

Liu

et al. 2022

Laser & Photonics Reviews

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“…Therefore, new inorganic host materials are used. The most common phosphor types are based on single crystals (SC), transparent ceramics (TC), composite ceramics (CC), phosphor in glass (PiG) or phosphor in glass films (PiGF) [2][3][4][5][6][7][8][9][10][11]. These different phosphor materials have different advantages and disadvantages concerning their efficiency, colorimetric properties, thermal dissipation, saturation threshold, ease and cost of fabrication and so on.…”

Section: Introductionmentioning

confidence: 99%

Luminance and chromaticity characteristics of different phosphor types in laser lighting

Jensen,

Chen,

et al. 2024

J. Phys. Photonics

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Laser lighting is emerging as a viable replacement for other light sources in applications requiring high luminance not achievable with LEDs. Phosphor materials for laser lighting are often optimized in terms of luminous efficiency and/or colorimetric properties, while the light homogeneity is often neglected. We present a thorough investigation of the homogeneity of the chromaticity and the luminance profile for the most common types of phosphors used in laser lighting. We find that the achievable luminance and homogeneity of the light spot depends significantly on the phosphor used to convert the blue laser light to white light. The findings of these investigations will present guidelines for optimal phosphor material parameters to achieve high luminance combined with homogeneous chromaticity.

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“…Currently, YAG:Ce is still generally regarded as the best LCM for LD lighting for its high absorption of blue LD and excellent luminescent efficiency, and three types of material forms are mainly used so far, including transparent ceramic (TC), [19][20][21][22][23][24] single crystal (SC), [25][26][27][28] and phosphors in glass (PiG). [29][30][31][32][33][34][35][36][37][38][39][40][41] SC has perfect crystal structure and excellent heat resistance, but its light output is low and light uniformity is poor due to the absence of scattering effect.…”

Section: Introductionmentioning

confidence: 99%

YAG:Ce PiGF@Alumina‐Substrate in a Reflection Mode for High‐Brightness Laser‐Driven Projection Display

Yang

Zheng

Pang

et al. 2023

Adv Materials Technologies

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Laser‐driven projector puts forward urgent demand for light‐conversion materials to achieve high‐quality image display. Herein, a composite structure phosphor‐in‐glass film (PiGF) is fabricated via screen‐printing YAG:Ce and low‐melting glass on the alumina substrate. Benefited from well‐retained optical properties of YAG:Ce in amorphous glass and high thermal conductivity of substrate, PiGF can produce desirable luminous flux of 7169 lm and luminous efficiency of 192 lm W−1 at saturation threshold of 13.25 W mm−2. Furthermore, it is demonstrated that thermal management by using a cool fan with aluminum heat sink is essential to reduce heat aggregation and improve white‐light stability of PiGF‐based laser lighting source operated in a reflective mode. Accordingly, a PiGF‐converted laser projection system is successfully designed for the first time, showing more vivid and brighter display feature benefited from high laser‐driven luminance of LCD screen (2180 cd m−2). This work highlights the practical application of PiGF@alumina‐substrate composite as an efficient laser‐driven color converter in high‐brightness projection display.

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AlN–Ce-doped yttrium aluminum garnet composite ceramic phosphor for high-power laser lighting

Cited by 23 publications

References 39 publications

Realizing High‐Power Laser Lighting: Artfully Importing Micrometer BN into Ce: GdYAG Phosphor‐in‐Glass Film

Realizing High‐Power Laser Lighting: Artfully Importing Micrometer BN into Ce: GdYAG Phosphor‐in‐Glass Film

Luminance and chromaticity characteristics of different phosphor types in laser lighting

YAG:Ce PiGF@Alumina‐Substrate in a Reflection Mode for High‐Brightness Laser‐Driven Projection Display

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