YAG: Ce3+,Mn2+ transparent ceramics prepared by gel-casting for warm white LEDs

Ce:YAG transparent ceramics have great potential in white LEDs, especially under high power packaging technology, due to their superior thermal performance.

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Efficient spectral regulation in Ce:Lu3(Al,Cr)5O12 and Ce:Lu3(Al,Cr)5O12/Ce:Y3Al5O12 transparent ceramics with high color rendering index for high-power white LEDs/LDs

Journal of Advanced Ceramics ◽

10.1007/s40145-021-0496-8 ◽

2021 ◽

Author(s):

Tianyuan Zhou ◽

Chen Hou ◽

Le Zhang ◽

Yuelong Ma ◽

Jian Kang ◽

...

Keyword(s):

Thermal Stability ◽

High Power ◽

White Led ◽

Transparent Ceramics ◽

Photoluminescence Excitation ◽

Unilateral Shift ◽

Excitation Mode ◽

White Leds ◽

Color Rendering Index ◽

Color Rendering

AbstractRealizing a high color rendering index (CRI) in Ce:LuAG transparent ceramics (TCs) with desired thermal stability is essential to their applications in white LEDs/LDs as color converters. In this study, based on the scheme of configuring the red component by Cr3+ doping, an efficient spectral regulation was realized in Ce,Cr:LuAG TCs. A unilateral shift phenomenon could be observed in both photoluminescence (PL) and photoluminescence excitation (PLE) spectra of TCs. By constructing TC-based white LED/LD devices in a remote excitation mode, luminescence properties of Ce,Cr:LuAG TCs were systematically investigated. The CRI values of Ce:LuAG TC based white LEDs could be increased by a magnitude of 46.2%. Particularly, by combining the as fabricated Ce,Cr:LuAG TCs with a 0.5 at% Ce:YAG TC, surprising CRI values of 88 and 85.5 were obtained in TC based white LEDs and LDs, respectively. Therefore, Ce,Cr:LuAG TC is a highly promising color convertor for high-power white LEDs/LDs applied in general lighting and displaying.

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Weak thermal quenching and tunable luminescence in Ce:Y3(Al,Sc)5O12 transparent ceramics for high power white LEDs/LDs

Chemical Engineering Journal ◽

10.1016/j.cej.2020.125486 ◽

2020 ◽

Vol 398 ◽

pp. 125486 ◽

Cited By ~ 3

Author(s):

Yuelong Ma ◽

Le Zhang ◽

Tianyuan Zhou ◽

Bingheng Sun ◽

Qing Yao ◽

...

Keyword(s):

High Power ◽

Thermal Quenching ◽

Transparent Ceramics ◽

White Leds

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Gel‐casting of MgAl 2 O 4 transparent ceramics using a common dispersant

Journal of the American Ceramic Society ◽

10.1111/jace.16316 ◽

2019 ◽

Vol 102 (6) ◽

pp. 3081-3084 ◽

Cited By ~ 2

Author(s):

Mengwei Liu ◽

Shunzo Shimai ◽

Jin Zhao ◽

Jian Zhang ◽

Dan Han ◽

...

Keyword(s):

Transparent Ceramics ◽

Gel Casting

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Dual effect synergistically triggered Ce:(Y,Tb)3(Al,Mn)5O12 transparent ceramics enabling a high color-rendering index and excellent thermal stability for white LEDs

Journal of the European Ceramic Society ◽

10.1016/j.jeurceramsoc.2020.11.001 ◽

2020 ◽

Author(s):

Yuelong Ma ◽

Le Zhang ◽

Tianyuan Zhou ◽

Bingheng Sun ◽

Chen Hou ◽

...

Keyword(s):

Thermal Stability ◽

Transparent Ceramics ◽

Dual Effect ◽

Excellent Thermal Stability ◽

White Leds ◽

Color Rendering Index ◽

Color Rendering

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High quantum efficiency Ce:(Lu,Y)3(Al,Sc)2Al3O12 transparent ceramics with excellent thermal stability for high-power white LEDs/LDs

Journal of Materials Chemistry C ◽

10.1039/d0tc04231e ◽

2020 ◽

Vol 8 (46) ◽

pp. 16427-16435

Author(s):

Yuelong Ma ◽

Le Zhang ◽

Tianyuan Zhou ◽

Chen Hou ◽

Jian Kang ◽

...

Keyword(s):

Thermal Stability ◽

Quantum Efficiency ◽

High Power ◽

Light Emitting Diode ◽

Transparent Ceramics ◽

High Quantum Efficiency ◽

Excellent Thermal Stability ◽

Light Emitting ◽

White Leds ◽

High Quantum

Transparent ceramics (TCs) with high quantum efficiency and excellent thermal stability are essential for the applications in high-power remote excitation white light-emitting diode or laser diode (LED/LD) lighting devices as color convertors.

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