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

Yang, Zezhong; Zheng, Shibao; Pang, Tao; Liao, Shengxiang; Zhu, Jiwen; Lin, Jidong; Huang, Feng; Zheng, Yuanhui; Chen, Daqin

doi:10.1002/admt.202300132

Cited by 14 publications

(3 citation statements)

References 48 publications

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“…3a , the photoluminescence excitation (PLE) spectra of YAG:Ce-PGC consist of two excitation bands centered at 343 nm and 450 nm, respectively. Under 450 nm blue light excitation, the 5 d → 4 f transition of Ce 3+ brings a broad yellow emission with the center wavelength of 552 nm 40 . However, the weak excitation peak at 343 nm in YAG:Ce-PGC contributes to the high absorption of the tellurite glass in the ultraviolet range (Fig.…”

Section: Resultsmentioning

confidence: 99%

Rapid synthesis of phosphor-glass composites in seconds based on particle self-stabilization

Sun,

Wang,

Chen

et al. 2024

Nat Commun

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Phosphor-glass composites (PGC) are excellent candidates for highly efficient and stable photonic converters; however, their synthesis generally requires harsh procedures and long time, resulting in additional performance loss and energy consumption. Here we develop a rapid synthetic route to PGC within about 10 seconds, which enables uniform dispersion of Y3Al5O12:Ce3+ (YAG:Ce) phosphor particles through a particle self-stabilization model in molten tellurite glass. Thanks for good wettability between YAG:Ce micro-particles and tellurite glass melt, it creates an energy barrier of 6.94 × 105 zJ to prevent atomic-scale contact and sintering of particles in the melt. This in turn allows the generation of YAG:Ce-based PGC as attractive emitters with high quantum efficiency (98.4%) and absorption coefficient (86.8%) that can produce bright white light with luminous flux of 1227 lm and luminous efficiency of 276 lm W−1 under blue laser driving. This work shows a generalizable synthetic strategy for the development of functional glass composites.

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Section: Resultsmentioning

confidence: 99%

Rapid synthesis of phosphor-glass composites in seconds based on particle self-stabilization

Sun,

Wang,

Chen

et al. 2024

Nat Commun

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“…Among them, phosphor ceramics are recognized to be the most promising color converter for high-brightness solid-state lighting due to their excellent resistance to laser irradiation and thermal shock and easy control of microstructures [18][19][20][21][22]. To date, most laser lighting devices are still involving opaque phosphor ceramics and thus operating in a reflective mode [23,24]. However, encapsulation schemes are complicated, and the tunability of the optical performance is difficult to satisfy different applications.…”

Section: Introduction mentioning

confidence: 99%

Cyan-green-emitting Ca ₃Sc ₂Si ₃O ₁₂:Ce ³⁺ transparent ceramics: A promising color converter for high-brightness laser lighting

Wu¹,

Wu²,

Pan³

et al. 2023

Journal of Advanced Ceramics

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Transparent phosphor ceramics have received increasing attention for high-brightness laser lighting, but commercially available phosphor ceramics are currently mainly limited to yellow YAG:Ce and green LuAG:Ce garnets, leaving a "cyan cavity" which is an obstacle to realizing full-color lighting. Achieving new phosphor ceramics capable of filling the cavity is a challenge. Herein, for the first time, cyan-green-emitting Ca 3 Sc 2 Si 3 O 12 :Ce 3+ (CSS:Ce) transparent ceramics have been successfully developed by two-step sintering technique under vacuum. The as-prepared CSS:Ce ceramics present high relative density of 99.7% and optical transmittance of 71% in the cyan-green spectral region. It exhibits an efficient band emission peaking at 504 nm (under 450 nm excitation) with internal/external quantum efficiency of 91%/62%. Furthermore, it has excellent thermal stability with a thermal quenching temperature (T 0.5 ) of 838 K, approximately 100 K higher than that of LuAG:Ce ceramics (738 K). In addition, the CSS:Ce ceramics can withstand blue laser density of 45.6 W/mm 2 and meanwhile generates cyan-green light with a forward luminous flux of 813 lm and forward luminous efficacy of 162 lm/W. The CSS:Ce transparent ceramics exhibit excellent luminescence performance comparable to the commercial LuAG:Ce ceramics and could be a highly promising color converter for high-brightness laser lighting.

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“…As an indispensable part of people's daily life, projection displays pursue higher brightness and wider color gamut [1][2][3][4]. The new lighting technology of light-emitting diode (LED) and laser diode (LD) has gradually replaced traditional lighting sources with shortcomings of short service life, long response time, and degradation of lighting quality with long-term usage, such as halogen lamps, high-pressure sodium lamps, and high-pressure mercury lamps [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Patterned phosphor-in-glass films with efficient thermal management for high-power laser projection displays

Yang,

Zheng,

et al. 2023

Journal of Advanced Ceramics

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Recently, high-performance color converters excitable by blue laser diode (LD) have sprung up for projection displays. However, the thermal accumulation effect of the color converters is a non-negligible problem under high-power LD irradiation. Herein, we developed novel opto-functional composites (patterned CaAlSiN 3 :Eu 2+ phosphor-in-glass film-Y 3 Al 5 O 12 :Ce 3+ phosphor-in-glass film@Al 2 O 3 plate with aluminum "heat sink") via a thermal management methodology of combining "phosphor wheel" and "heat sink" for a lighting source of highpower laser projection displays. This new composite design makes it effective to transport generated thermal phonons away to reduce the thermal ionization process, and to yield stable and high-quality white light with brightness of 4510 lm@43 W, luminous efficacy of 105 lm/W, correlated color temperature of 3541 K, and color rendering index of 80.0. Furthermore, the phosphor-in-glass film-converted laser projection system was also successfully designed, showing a more vivid color effect compared to a traditional LED-based projector. This work emphasizes the importance of the thermal management upon high-power laser irradiation, and hopefully facilitates the development of a new LD-driven lighting source for high-power laser projection displays.

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

Cited by 14 publications

References 48 publications

Rapid synthesis of phosphor-glass composites in seconds based on particle self-stabilization

Rapid synthesis of phosphor-glass composites in seconds based on particle self-stabilization

Cyan-green-emitting Ca ₃Sc ₂Si ₃O ₁₂:Ce ³⁺ transparent ceramics: A promising color converter for high-brightness laser lighting

Patterned phosphor-in-glass films with efficient thermal management for high-power laser projection displays

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

Cited by 14 publications

References 48 publications

Rapid synthesis of phosphor-glass composites in seconds based on particle self-stabilization

Rapid synthesis of phosphor-glass composites in seconds based on particle self-stabilization

Cyan-green-emitting Ca 3Sc 2Si 3O 12:Ce 3+ transparent ceramics: A promising color converter for high-brightness laser lighting

Patterned phosphor-in-glass films with efficient thermal management for high-power laser projection displays

Contact Info

Product

Resources

About

Cyan-green-emitting Ca ₃Sc ₂Si ₃O ₁₂:Ce ³⁺ transparent ceramics: A promising color converter for high-brightness laser lighting