Highly thermal-stable warm w-LED based on Ce:YAG PiG stacked with a red phosphor layer

Lin, Zebin; Lin, Hang; Xu, Jü; Huang, Feng; Chen, Hui; Wang, Bo; Wang, Yuansheng

doi:10.1016/j.jallcom.2015.07.118

Cited by 91 publications

(21 citation statements)

References 23 publications

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“…In the conventional structure, almost 60% of blue light is backscattered by the phosphor and lost in the chips . Therefore, the remote PiG coating is beneficial to reduce the loss of light . In addition, the PiG coating is set to face the chips, since it is beneficial to reduce the blue absorption of the glass substrate.…”

Section: Resultsmentioning

confidence: 99%

Gradient refractive index structure of phosphor‐in‐glass coating for packaging of white LEDs

Zhuo

et al. 2018

J Am Ceram Soc

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A gradient refractive index (GRIN) structure, with a gradual increase in the refractive index from the glass substrate, was successfully obtained by multilayer screen printing for white light‐emitting diodes (w‐LEDs) packaging. Each phosphor‐in‐glass (PiG) coating consisted of B2O3–SiO2–ZnO glass matrix and yellow phosphor. The gradually increased refractive index (1.62, 1.72, and 1.82) of glass matrices were obtained from higher molecular weight of La2O3 and WO3. After sintering at 600°C, no obvious interface was observed and the phosphor particles were mixed thoroughly in the glass matrix. When the phosphor content was 50 wt%, the white‐light emission was obtained. Compared with those based on the nongradient and low‐refractive PiG coating, the luminous efficacy of w‐LEDs constructed by the PiG coating with GRIN was enhanced. It shows that the GRIN structure is beneficial to improve the luminous efficacy of w‐LEDs.

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Section: Resultsmentioning

confidence: 99%

Gradient refractive index structure of phosphor‐in‐glass coating for packaging of white LEDs

Zhuo

et al. 2018

J Am Ceram Soc

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“…. To solve the red-deficiency problem for some types of pcWLEDs, Lin et al [185] have fabricated a warm pcWLED by introducing a red CaAlSiN 3 :Eu 2? phosphor layer onto a yellow YAG:Ce 3?…”

Section: Red Phosphors-other Hostsmentioning

confidence: 99%

Inorganic Phosphor Materials for Lighting

2016

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This chapter addresses the development of inorganic phosphor materials capable of converting the near UV or blue radiation emitted by a light emitting diode to visible radiation that can be suitably combined to yield white light. These materials are at the core of the new generation of solid-state lighting devices that are emerging as a crucial clean and energy saving technology. The chapter introduces the problem of white light generation using inorganic phosphors and the structureproperty relationships in the broad class of phosphor materials, normally containing lanthanide or transition metal ions as dopants. Radiative and non-radiative relaxation mechanisms are briefly described. Phosphors emitting light of different colors (yellow, blue, green, and red) are described and reviewed, classifying them in different chemical families of the host (silicates, phosphates, aluminates, borates, and non-oxide hosts). This research field has grown rapidly and is still growing, but the discovery of new phosphor materials with optimized properties (in terms of emission efficiency, chemical and thermal stability, color, purity, and cost of fabrication) would still be of the utmost importance.

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“…Phosphor layer plays an important role in the output performance and light quality of LEDs [11,12]. There have been amount of phosphors containing VO 4 3-, NbO 6 7-, Mo(W)O 6 6-that can be excited in near UV region due to charge transfer (CT) transitions in host lattice [13][14][15][16]. The absorption capability of host lattice through CT transition is important.…”

Section: A N U S C R I P Tmentioning

confidence: 99%

“…Compounds with tetrahedral MO 4 2-(M=Mo, W) groups have been studied and the broad CTB for O 2--M 6+ usually lies in 200 350 nm range [20,[22][23][24]. This limits excitation efficiency of the phosphors in near UV and blue region, where the most efficient LEDs are available today.…”

Section: A N U S C R I P Tmentioning

confidence: 99%

Luminescent properties and energy transfer of Sm3+ doped Sr2CaMo1-xWxO6 as a potential phosphor for white LEDs

Wang

Noh

Moon

et al. 2016

Journal of Alloys and Compounds

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Highly thermal-stable warm w-LED based on Ce:YAG PiG stacked with a red phosphor layer

Cited by 91 publications

References 23 publications

Gradient refractive index structure of phosphor‐in‐glass coating for packaging of white LEDs

Gradient refractive index structure of phosphor‐in‐glass coating for packaging of white LEDs

Inorganic Phosphor Materials for Lighting

Luminescent properties and energy transfer of Sm3+ doped Sr2CaMo1-xWxO6 as a potential phosphor for white LEDs

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