Y2O3:Eu3+ phosphor: a novel solution for an increase in color rendering index of multi-chip white LED packages

Anh, Nguyen Doan Quoc; Lee, Hsiao-Yi; Phuong, Tran Thanh; Nhân, Nguyễn Hữu; Minh, Tran Hoang Quang; Ly, Truong Huu

doi:10.1080/02533839.2017.1299592

Cited by 11 publications

(5 citation statements)

References 11 publications

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“…It indicated that the scattering stability of the red phosphor showed great uses for controlling the color quality of the in-cup packaging WLEDs. From the analysis the scattering process in the phosphor layer of the in-cup packaging WLEDs, the results indicated that the involvement of the red phosphor into the phosphor compounding could play a major role in controlling the optical properties of the in-cup packaging WLEDs [16][17][18]. Furthermore, the effect of the red phosphor size on the CRI and CQS of the 7000KIPP-WLEDs are drawn in Figure 6 and 7.…”

Section: Numerical Results and Discussionmentioning

confidence: 93%

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Using Sr[Mg3SiN4]Eu2+ phosphor for enhancing color uniformity and luminous efficacy of the 7000 K IPP-WLEDs

Phan

Tin

Tran

et al. 2020

IJEECS

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As a novel class of inorganic phosphors, oxynitride and nitride luminescent materials have received considerable attention because of their potential applications in solid-state lightings and displays. In this paper, we built the simulation model of the 7000 K in-cup phosphor packaging white LEDs (IPP-WLEDs) by using the Light Tools software. After that, the effect of the Sr[Mg3SiN4]Eu2+ phosphor particle’s size on the lighting performance in term of CCT Deviation (D-CCT), Color Rendering Index (CRI), Color Quality Scale (CQS), and Lumen Output (LO) is analyzed and investigated. In addition, the scattering processes in the phosphor layers of the 7000 K IPP_WLEDs is derived using Mat Lab software. From the research results, we can state that the phosphor size significantly effects on the lighting performance of the 7000K IPP_WLEDs. It can be seen that Sr[Mg3SiN4]Eu2+ phosphor can be considered as a novel solution for improving the lighting performance of the WLEDs in the near future.

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Section: Numerical Results and Discussionmentioning

confidence: 93%

“…In this section, applying Mie theory [16][17][18][21][22][23][24][25], the coefficients of the scattering process of the phosphor layer of the in-cup packaging WLEDs can be calculated as the below expressions: A. The scattering coefficient μsca(λ):…”

Section: Mathematical Analysismentioning

confidence: 99%

Using Sr[Mg3SiN4]Eu2+ phosphor for enhancing color uniformity and luminous efficacy of the 7000 K IPP-WLEDs

Phan

Tin

Tran

et al. 2020

IJEECS

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“…The phosphor-free white-color μLEDs exhibit nearly a neutral white light emission, with correlated color temperature of ~ 4850 K. Additionally, a relatively high color rendering index (CRI) of ~ 94 was measured for this phosphor-free white-color μLED, which is extremely difficult to achieve using planar LED structures. Currently, phosphor-based white LEDs have CRI values in the range of 80–86 [45,46,47,48]. With some special design of phosphor converters, the CRI of these types of white LEDs can be increased up to 90–97 [49,50,51,52,53].…”

Section: Resultsmentioning

confidence: 99%

Full-Color InGaN/AlGaN Nanowire Micro Light-Emitting Diodes Grown by Molecular Beam Epitaxy: A Promising Candidate for Next Generation Micro Displays

et al. 2019

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We have demonstrated full-color and white-color micro light-emitting diodes (μLEDs) using InGaN/AlGaN core-shell nanowire heterostructures, grown on silicon substrate by molecular beam epitaxy. InGaN/AlGaN core-shell nanowire μLED arrays were fabricated with their wavelengths tunable from blue to red by controlling the indium composition in the device active regions. Moreover, our fabricated phosphor-free white-color μLEDs demonstrate strong and highly stable white-light emission with high color rendering index of ~ 94. The μLEDs are in circular shapes with the diameter varying from 30 to 100 μm. Such high-performance μLEDs are perfectly suitable for the next generation of high-resolution micro-display applications.

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“…b. LEDs chips are covered with a fixed thickness of 0.08 mm and 2.07 mm. c. Each blue chip has a dimension of 1.14 mm by 0.15mm, the radiant flux of 1.16 W, and the peak wavelength of 453 nm as shown in Figure 1(b) [11][12][13]. For demonstrating the influence of the red phosphor's concentration on the CCT-D and LO, we can simulate the scattering and reduced scattering processes inside the phosphor layer of the 6600K ICP-WLEDs based on the Mie-scattering [15][16][17][18][19][20].…”

Section: Methodsmentioning

confidence: 99%

“…In [10], the effect of phosphor location on the spatial color distribution was demonstrated. In this trend, authors in [11][12] investigated the effect of the red-emitting phosphor on the lighting performance and optical properties of the white LEDs. For extending the research in [13], this paper investigated the influence of the red phosphor concentration on the color correlated temperature deviation (CCT-D) and lumen output (LO) of the white LEDs.…”

Section: Introductionmentioning

confidence: 99%

Improving CCT-D and LO of the 6600K ICP-WLEDs by K2SiF6:Mn4+ Phosphor

Tin¹,

Le²,

Tran³

et al. 2019

IJPEDS

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In this research, we propose a novel recommendation for improving CCT-D and lumen output (LO) of the 6600K in-cup packaging white LEDs (ICP-WLEDs) by varying its particle concentration. By using Light Tools and Mat lab software based on the Mie Theory, we derive the influence of the red phosphor particle’s concentration on the D-CCT and LO. The results show that the CCT-D are significantly affected when the concentration of the red phosphor varying from 0% to 1.8%. The CCT-D decreases from 4000K to 2200K and LO increases from 800 lm to 1300 lm.

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Y₂O₃:Eu³⁺ phosphor: a novel solution for an increase in color rendering index of multi-chip white LED packages

Cited by 11 publications

References 11 publications

Using Sr[Mg3SiN4]Eu2+ phosphor for enhancing color uniformity and luminous efficacy of the 7000 K IPP-WLEDs

Using Sr[Mg3SiN4]Eu2+ phosphor for enhancing color uniformity and luminous efficacy of the 7000 K IPP-WLEDs

Full-Color InGaN/AlGaN Nanowire Micro Light-Emitting Diodes Grown by Molecular Beam Epitaxy: A Promising Candidate for Next Generation Micro Displays

Improving CCT-D and LO of the 6600K ICP-WLEDs by K2SiF6:Mn4+ Phosphor

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