Phosphor-in-glass (PIG) converter sintered by a fast Joule heating process for high-power laser-driven white lighting

Liang, Yifu; Ding, Xinrui; Yan, Caiman; Bai, Shigen; Liang, Guanwei; Yang, Shu; Liu, Bin; Tang, Yong

doi:10.1364/oe.419633

Cited by 15 publications

(7 citation statements)

References 43 publications

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“…Furthermore, it is possible to gain a notable increase in LED performance from this model. The transferred blue light and transformed yellow light for a one-coating distant phosphor cluster with a 2h thickness are described as follows [23,24] The transmitted blue light along with transformed yellow one for dual-layer distant phosphor configuration with h as the thickness of the phosphor layer are presented as:…”

Section: Computation and Discussionmentioning

confidence: 99%

Double-layer Remote Configuration with LaOF: Eu³⁺ and Sr₃WO₆:U Phosphors: A Selection for Enhancing The Optical Efficiency of WLEDs

Hung

Lee

2022

J. Phys.: Conf. Ser.

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Although the distant phosphor configuration is a good selection for high-luminescence WLEDs, it did not satisfy the high color adequacy standard. With the aim of achieving improved chromatic indices, including the index for color rendering (CRI) and the scale of color quality (CQS), for the distant phosphor structure, a dual-layer design with red or green phosphor addition is suggested in this research report. The color temperature of the WLEDs packets employed in this investigation is 8500 K. The phosphor configuration will be produced by layering green Sr3WO6:U or red LaOF:Eu3+ phosphor on top of the yellow phosphor YAG:Ce3+. The concentration of additional red phosphor LaOF:Eu3+ and green phosphor Sr3WO6:U will then be adjusted to observe the changes in color in luminescence performance of the WLED packages. The theory of Mie about scattering combined with Lambert Beer’s rule supports the investigation on optical results. The findings demonstrated a rise in CRI and CQS along with the existence of LaOF:Eu3+, indicating that the LaOF:Eu3+ presence has a major impact on these two elements. Because of the increased concentration of red light components within WLED packets, CRI and CQS increase with increasing concentration of LaOF:Eu3+. In the meantime, the green phosphor Sr3WO6:U improves the beams of light. However, if the concentrations of both the red LaOF:Eu3+ and the green Sr3WO6:U phosphors are above the corresponding level, the beams of light and color intensity will be reduced. The outcomes of this study are crucial references for producing WLEDs with greater light of white standard.

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Section: Computation and Discussionmentioning

confidence: 99%

Double-layer Remote Configuration with LaOF: Eu³⁺ and Sr₃WO₆:U Phosphors: A Selection for Enhancing The Optical Efficiency of WLEDs

Hung

Lee

2022

J. Phys.: Conf. Ser.

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“…As shown in (1), R, K, S indicate the reflection, absorption, diffusing factor. According to the Tauc expression demonstrates the relationship between the bandgap Eg and a substance's linear coefficient α [24].…”

Section: Luminescence Features and Energy Shift Of The Phosphor Slpo:...mentioning

confidence: 99%

The impacts from Sr4La(PO4)3O: Ce3+, Tb3+, Mn2+ phosphor resulting in luminous flux of WLED devices

Dang

Hien

Thai

2022

IJEECS

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Using the solid-state technique that involves great temperature, we created multiple phosphors Sr4La(PO4)3O:Ce3+, Tb3+, Mn2+ (abbreviated as SLPO:Ce, Tb, Mn). We then examined their heat consistency, luminescence, as well as energy shift from Ce3+ to Tb3+ and Mn2+. We can acquire a considerable boost for the faint emission in green generated by Tb3+ as well as the emission in red generated by Mn2+ via adding the sensitizer Ce3+ ions. Through modifying the proportion between Ce3+ and Tb3+ along with the proportion between Ce3+ and Mn2+, it is possible to adjust the chroma of emission. We acquired white illumination which had color coordinates determined as (0.3326, 0.3298) for the testing phosphor Sr4La(PO4)3O: 0.12Ce3+, 0.3Mn2+. Such result displays the promising efficiency of phosphors Sr4La(PO4)3O:Ce3+, Tb3+, Mn2+ for the WLED devices.

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“…[22] Currently, Joule heating and induction heating are introduced as advanced methods for rapidly synthesizing various materials such as graphene fiber, [23] phosphor converter, [24] and metastable 2D materials. [25] Recently, our group developed an ultrafast high-temperature sintering (UHS) method that can rapidly synthesize and sinter solid-state electrolytes, [26,27] metals, [28] phosphor converters, [29] and ceramics. [30,31] The challenge of sintering high-quality glasses with a facile and rapid method is now being addressed with UHS.…”

Section: Introductionmentioning

confidence: 99%

Rapid Pressureless Sintering of Glasses

Lin

Zhao

Wang

et al. 2022

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Silica glasses have wide applications in industrial fields due to their extraordinary properties, such as high transparency, low thermal expansion coefficient, and high hardness. However, current methods of fabricating silica glass generally require long thermal treatment time (up to hours) and complex setups, leading to high cost and slow manufacturing speed. Herein, to obtain high‐quality glasses using a facile and rapid method, an ultrafast high‐temperature sintering (UHS) technique is reported that requires no additional pressure. Using UHS, silica precursors can be densified in seconds due to the large heating rate (up to 102 K s−1) of closely placed carbon heaters. The typical sintering time is as short as ≈10 s, ≈1–3 orders of magnitude faster than other methods. The sintered glasses exhibit relative densities of > 98% and high visible transmittances of ≈90%. The powder‐based sintering process also allows rapid doping of metal ions to fabricate colored glasses. The UHS is further extended to sinter other functional glasses such as indium tin oxide (ITO)‐doped silica glass, and other transparent ceramics such as Gd‐doped yttrium aluminum garnet. This study demonstrates an UHS proof‐of‐concept for the rapid fabrication of high‐quality glass and opens an avenue toward rapid discovery of transparent materials.

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Phosphor-in-glass (PIG) converter sintered by a fast Joule heating process for high-power laser-driven white lighting

Cited by 15 publications

References 43 publications

Double-layer Remote Configuration with LaOF: Eu³⁺ and Sr₃WO₆:U Phosphors: A Selection for Enhancing The Optical Efficiency of WLEDs

Double-layer Remote Configuration with LaOF: Eu³⁺ and Sr₃WO₆:U Phosphors: A Selection for Enhancing The Optical Efficiency of WLEDs

The impacts from Sr4La(PO4)3O: Ce3+, Tb3+, Mn2+ phosphor resulting in luminous flux of WLED devices

Rapid Pressureless Sintering of Glasses

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Phosphor-in-glass (PIG) converter sintered by a fast Joule heating process for high-power laser-driven white lighting

Cited by 15 publications

References 43 publications

Double-layer Remote Configuration with LaOF: Eu3+ and Sr3WO6:U Phosphors: A Selection for Enhancing The Optical Efficiency of WLEDs

Double-layer Remote Configuration with LaOF: Eu3+ and Sr3WO6:U Phosphors: A Selection for Enhancing The Optical Efficiency of WLEDs

The impacts from Sr4La(PO4)3O: Ce3+, Tb3+, Mn2+ phosphor resulting in luminous flux of WLED devices

Rapid Pressureless Sintering of Glasses

Contact Info

Product

Resources

About

Double-layer Remote Configuration with LaOF: Eu³⁺ and Sr₃WO₆:U Phosphors: A Selection for Enhancing The Optical Efficiency of WLEDs

Double-layer Remote Configuration with LaOF: Eu³⁺ and Sr₃WO₆:U Phosphors: A Selection for Enhancing The Optical Efficiency of WLEDs