High specific surface area inherited from sea-urchin-like AACH clusters prepared by a novel spray precipitation

Zhang, Xi-Yue; Zhang, Le; Zhou, Tianyuan; Sun, Bingheng; Wei, Shuai; Cao, Yifei; Liu, Mingyuan; Sang, Pengfei; Wei, Cong; Chen, Wei; Chen, Hao

doi:10.1007/s12598-022-02102-1

Cited by 21 publications

(3 citation statements)

References 62 publications

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“…White light emitting diodes or laser diodes (WLEDs/WLDs) have attracted significant attention for their environmentally friendly nature, small volume and long service life. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] Currently, the main method for constructing WLEDs/WLDs is to combine a blue LED/LD chip or a blue laser source with a Ce 3+ :Y 3 Al 5 O 12 (Ce:YAG) material. 17,18 However, phosphors encapsulated by the traditional organic resin have low thermal conductivity (0.1-0.4 W m À1 K À1 ), and are easy to burn or carbonize at high temperatures, which are not suitable for high power LED or LD lighting.…”

Section: Introductionmentioning

confidence: 99%

Ce:(Lu,Sr)₃(Al,Si)₅O₁₂ transparent ceramics for high-power white LEDs/LDs with ultra-high luminance saturation threshold

Zhang,

Sang,

Wei

et al. 2024

J. Mater. Chem. C

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Section: Introductionmentioning

confidence: 99%

Ce:(Lu,Sr)₃(Al,Si)₅O₁₂ transparent ceramics for high-power white LEDs/LDs with ultra-high luminance saturation threshold

Zhang,

Sang,

Wei

et al. 2024

J. Mater. Chem. C

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“…In addition, owing to the doping of rare-earth ions, the thermal conductivity of ceramics is always reduced, thus inducing a thermal-focusing effect, which limits their application in high power lighting [17,32]. Researchers have prepared the CCP to solve the above luminous and thermal problems, and the secondary phase often has the higher thermal conductivity, such as Al 2 O 3 (32-35 W•m −1 •K −1 ), MgO (47-54 W•m −1 •K −1 ), and AlN (~220 W•m −1 •K −1 ) [26,27,29]. Zhao et al [33] also found that using Al 2 O 3 in CCPs could improve the thermal stability, and the CCPs exhibited high energy efficiency (84.6%).…”

Section: Introductionmentioning

confidence: 99%

Composite structure Al ₂O ₃/Al ₂O ₃–YAG:Ce/YAG ceramics with high color spatial uniformity for white laser lighting

Sang,

Zhang,

Kang

et al. 2024

Journal of Advanced Ceramics

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Composite ceramic phosphor (CCP) is a candidate light-conversion material to obtain the high-quality laser lighting source. Phosphors based on the transmissive configuration model could not simultaneously meet the requirements of angular color uniformity and high thermal stability. In this study, a novel composite structure ceramic was designed, including Al 2 O 3 -YAG:Ce/YAG layered ceramic with a size of 1 mm × 1 mm for lighting, and Al 2 O 3 ceramic (φ = 16.0 mm) was used as the wrapping material due to its outstanding thermal stability. The prepared ceramics exhibited excellent thermal performance and no yellow ring phenomenon. Through this design, we achieved the match of the intensity distribution of the blue and yellow lights, resulting in a high angular color uniformity of 0.9 with a view angle of ±80°. All ceramics showed no luminous saturation phenomenon, even the laser power density was increased up to 47.51 W/mm 2 . A high-brightness white-light source with a luminous flux of 618 lm, a luminous efficiency of 126 lm/W, a CCT of 6615 K, and a CRI of 69.9 was obtained in the transmissive configuration. In particular, the surface temperature of the ceramic was as low as 74.1 ℃ under a high laser radiation (47.51 W/mm 2 ). These results indicate that Al 2 O 3 /Al 2 O 3 -YAG:Ce/YAG composite structure ceramic is a promising luminescent material in the high-power laser lighting applications.

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“…The fourth-generation solid-state lighting source (LEDs/LDs) has become the most promising lighting technology for its high efficiency, good stability, long working life, environmental protection and other advantages compared to traditional lighting structure [1][2][3][4][5]. Nowadays, the mainstream technical solution for white light generation is to combine blue LED/LD with phosphor conversion materials, and this new conversion materials mainly include phosphor ceramics (PCs), single crystals (SCs) and phosphor-in-glass (PIG) [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

High recorded color rendering performance of single-structured Ce,Mn:Y ₃(Al,Sc) ₂Al ₃O ₁₂ phosphor ceramics for high-power white LEDs/LDs

Liu,

Yang,

et al. 2024

Journal of Advanced Ceramics

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Achieving high color rendering index (CRI) and luminous stability in single-structured Ce:YAG phosphor ceramics (PCs) is crucial for high-power white light-emitting diodes or laser diodes (LEDs/LDs). However, cyan valley and insufficient red component of the Ce:YAG emission spectra significantly limit their real applications. In this work, a series of Ce,Mn:Y3(Al,Sc)2Al3O12 (Ce,Mn:YSAG) PCs J u s t A c c e p t e dwere fabricated by the vacuum sintering, and an efficient spectral regulation was realized for full-color lighting. The cyan valley was filled by blue-shifted emission peak of Ce 3+ via Sc 3+ doping. The orange-red emission around 580 nm was effectively supplemented via Mn 2+ doping. Particularly, the CRI of Ce,Mn:YSAG increased from 56.4 to 85.8 with a 52% increment compared with Ce:YAG under high-power LED excitation, and the operating temperature was stable at about 50 ℃ under long working time. Meanwhile, the CRI values of 80.9 could still be obtained in PC based white LDs.These results indicated that Ce,Mn:YSAG PC with excellent CRI and luminous stability is an extremely promising color convertor for high-power white LEDs/LDs.

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High specific surface area inherited from sea-urchin-like AACH clusters prepared by a novel spray precipitation

Cited by 21 publications

References 62 publications

Ce:(Lu,Sr)₃(Al,Si)₅O₁₂ transparent ceramics for high-power white LEDs/LDs with ultra-high luminance saturation threshold

Ce:(Lu,Sr)₃(Al,Si)₅O₁₂ transparent ceramics for high-power white LEDs/LDs with ultra-high luminance saturation threshold

Composite structure Al ₂O ₃/Al ₂O ₃–YAG:Ce/YAG ceramics with high color spatial uniformity for white laser lighting

High recorded color rendering performance of single-structured Ce,Mn:Y ₃(Al,Sc) ₂Al ₃O ₁₂ phosphor ceramics for high-power white LEDs/LDs

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High specific surface area inherited from sea-urchin-like AACH clusters prepared by a novel spray precipitation

Cited by 21 publications

References 62 publications

Ce:(Lu,Sr)3(Al,Si)5O12 transparent ceramics for high-power white LEDs/LDs with ultra-high luminance saturation threshold

Ce:(Lu,Sr)3(Al,Si)5O12 transparent ceramics for high-power white LEDs/LDs with ultra-high luminance saturation threshold

Composite structure Al 2O 3/Al 2O 3–YAG:Ce/YAG ceramics with high color spatial uniformity for white laser lighting

High recorded color rendering performance of single-structured Ce,Mn:Y 3(Al,Sc) 2Al 3O 12 phosphor ceramics for high-power white LEDs/LDs

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Ce:(Lu,Sr)₃(Al,Si)₅O₁₂ transparent ceramics for high-power white LEDs/LDs with ultra-high luminance saturation threshold

Ce:(Lu,Sr)₃(Al,Si)₅O₁₂ transparent ceramics for high-power white LEDs/LDs with ultra-high luminance saturation threshold

Composite structure Al ₂O ₃/Al ₂O ₃–YAG:Ce/YAG ceramics with high color spatial uniformity for white laser lighting

High recorded color rendering performance of single-structured Ce,Mn:Y ₃(Al,Sc) ₂Al ₃O ₁₂ phosphor ceramics for high-power white LEDs/LDs