Browse > Article
http://dx.doi.org/10.3807/COPP.2019.3.1.078

Selection of a Remote Phosphor Configuration to Enhance the Color Quality of White LEDs  

Anh, Nguyen Doan Quoc (Power System Optimization Research Group, Faculty of Electrical and Electronics Engineering, Ton Duc Thang University)
Le, Phan Xuan (Faculty of Electrical and Electronics Engineering, HCMC University of Food Industry)
Lee, Hsiao-Yi (Department of Electrical Engineering, National Kaohsiung University of Sciences and Technology)
Publication Information
Current Optics and Photonics / v.3, no.1, 2019 , pp. 78-85 More about this Journal
Abstract
The remote phosphor structure has been proven to bear greater luminous efficiency than both the conformal phosphor and in-cup phosphor structures; however, controlling its color quality is much more challenging. To solve this dilemma, various researchers have proposed dual-layer phosphor and triple-layer phosphor configuration as techniques to enhance the display brightness of white LEDs (WLEDs). Likewise, this study picked one of these configurations to utilize in multichip WLEDs with five distinct color temperatures in the range from 5600 to 8500 K, for the purpose of improving the optical properties of WLEDs, such as color rendering index (CRI), color quality scale (CQS), luminous efficacy (LE), and chromatic homogeneity. According to the results of this research, the triple-layer phosphor configuration has superior performance compared to other configurations in terms of CRI, CQS, and LE, and yields higher chromatic stability for WLEDs.
Keywords
Dual-layer phosphor; Triple-layer phosphor; Color rendering index; Luminous efficacy; Mie-scattering theory;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 P.-Q. Jiang, Y. Peng, Y. Mou, H. Cheng, M. X. Chen, and S. Liu, "Thermally stable multi-color phosphor-in-glass bonded on flip-chip UV-LEDs for chromaticity-tunable WLEDs," Appl. Opt. 56, 7921-7926 (2017).   DOI
2 S. Kim, F. Iqbal, and H.-S. Kim, "Relationship between phosphor properties and chromaticity of phosphor-in-glass," Appl. Opt. 56, 9477-9483 (2017).   DOI
3 H. Daicho, K. Enomoto, H. Sawa, S. Matsuishi, and H. Hosono, "Improved color uniformity in white light-emitting diodes using newly developed phosphors," Opt. Express 26, 24784-24791 (2018).   DOI
4 H. F. Sijbom, R. Verstraete, J. J. Joos, D. Poelman, and P. F. Smet, "$K_2SiF_6:Mn^{4+}$ as a red phosphor for displays and warm-white LEDs: a review of properties and perspectives," Opt. Mater. Express 7, 3332-3365 (2017).   DOI
5 Y. Peng, X. Guo, R.-X. Li, H. Cheng, and M.-X. Chen, "Thermally stable WLEDs with excellent luminous properties by screen-printing a patterned phosphor glass layer on a microstructured glass plate," Appl. Opt. 56, 3270-3276 (2017).   DOI
6 J.-F. Ruan, Z.-W. Yang, H.-L. Zhang, J.-B. Qiu, Z.-G. Song, and D.-C. Zhou, "Phase transformation induced reversible modulation of upconversion luminescence of WO3:Yb$^{3+}$, Er$^{3+}$ phosphor for switching devices," Opt. Lett. 43, 3885-3888 (2018).   DOI
7 L. Wang, X.-J. Wang, K. Takahashi, T. Takeda, N. Hirosaki, and R.-J. Xie, "Nitride phosphors as robust emissive materials in white flat field emission lamps," Opt. Mater. Express 7, 1934-1941 (2017).   DOI
8 Y. Peng, Y. Mou, X. Guo, X.-J. Xu, H. Li, M. X. Chen, and X.-B. Luo, "Flexible fabrication of a patterned red phosphor layer on a YAG:Ce$^{3+}$ phosphor-in-glass for highpower WLEDs," Opt. Mater. Express 8, 605-614 (2018).   DOI
9 B.-Y. Joo and J.-H. Ko, "Analysis of color uniformity of white LED lens packages for direct-lit LCD backlight applications," J. Opt. Soc. Korea 17, 506-512 (2013).   DOI
10 P. T. Tin, N. K. H. Nguyen, M. Q. H. Tran, and H.-Y. Lee, "Red-emitting ${\alpha}$-$SrO{\cdot}3B_2O_3$:Sm$^{2+}$ phosphor for WLED lamps: novel lighting properties with two-layer remote phosphor package," Curr. Opt. Photon. 1, 389-395 (2017).   DOI
11 Q. Zhang, R.-L. Zheng, J.-Y. Ding, and W. Wei, "Excellent luminous efficiency and high thermal stability of glassin-LuAG ceramic for laser-diode-pumped green-emitting phosphor," Opt. Lett. 43, 3566-3569 (2018).   DOI
12 S.-D. Yu, Y. Tang, Z.-T. Li, K.-H. Chen, X.-R. Ding, and B.-H. Yu, "Enhanced optical and thermal performance of white light-emitting diodes with horizontally layered quantum dots phosphor nanocomposites," Photon. Res. 6, 90-98 (2018).   DOI
13 M.-M. Jiao, C.-L. Yang, M.-L. Liu, Q.-F. Xu, Y. J. Yu, and H.-P. You, "$Mo^{6+}$ substitution induced band structure regulation and efficient near-UV-excited red emission in $NaLaMg(W,Mo)O_6$:Eu phosphor," Opt. Mater. Express 7, 2660-2671 (2017).   DOI
14 R. Liu, L.-J. Liu, and Y.-J. Liang, "Energy transfer and color-tunable luminescence properties of $YVO_4$:RE (RE = Eu$^{3+}$, Sm$^{3+}$, Dy$^{3+}$, Tm$^{3+}$) phosphors via molten salt synthesis," Opt. Mater. Express 8, 1686-1694 (2018).   DOI
15 T. Hayashida, H. Iwasaki, K. Masaoka, M. Shimizu, T. Yamashita, and W. Iwai, "Appropriate indices for color rendition and their recommended values for UHDTV production using white LED lighting," Opt. Express 25, 15010-15027 (2017).   DOI
16 S.-W. Jeon, S.-H. Kim, J. Choi, I. Jang, Y.-H. Song, W.-H. Kim, and J. P. Kim, "Optical design of dental light using a remote phosphor light-emitting diode package for improving illumination uniformity," Appl. Opt. 57, 5998-6003 (2018).   DOI
17 X.-R. Ding, Q. Chen, Y. Tang, J.-S. Li, D.-P. Talwar, B.-H. Yu, and Z.-T. Li, "Improving the optical performance of multi-chip LEDs by using patterned phosphor configurations," Opt. Express 26, A283-A292 (2018).   DOI
18 S. Liu, and X. B. Luo, LED Packaging for Lighting Applications: Design, Manufacturing and Testing (Chemical Industry Press and John Wiley & Sons, Beijing, 2011).
19 X.-Y. Huang, S.-Y. Wang, B. Li, Q. Sun, and H. Guo, "High-brightness and high-color purity red-emitting $Ca_3Lu(AlO)_3(BO_3)_4$:Eu$^{3+}$ phosphors with internal quantum efficiency close to unity for near-ultraviolet-based whitelight- emitting diodes," Opt. Lett. 43, 1307-1310 (2018).   DOI
20 T.-H. Yang, S.-M. Wu, C.-C. Sun, B. Glorieux, C.-Y. Chen, Y.-Y. Chang, X.-H. Lee, Y.-W. Yu, T.-Y. Chung, and K.-Y. Lai, "Stabilizing CCT in pcW-LEDs by self-compensation between excitation efficiency and conversion efficiency of phosphors," Opt. Express 25, 29287-29295 (2017).   DOI
21 W. M. Yen and M. J. Weber, Inorganic Phosphors: Compositions, Preparation and Optical Properties (CRC Press, LLC, 2000 N.W. Corporate Blvd., Boca Raton, Florida 33431, 2004).
22 Z.-T. Li, H.-Y. Wang, B.-H. Yu, X.-R. Ding, and Y. Tang, "High-efficiency LED COB device combined diced V-shaped pattern and remote phosphor," Chin. Opt. Lett. 15, 042301 (2017).   DOI
23 N. D. Q. Anh and H. Y. Lee, "Improving the angular color uniformity and the lumen output for white LED lamps by green $Ce_{0.67}$ $Tb_{0.33}$ $MgAl_{11}$ $O_{19}$:Ce,Tb phosphor," J. Chin. Inst. Eng. 39, 871-875 (2016).   DOI
24 B. Li, D. Zhang, Y. Huang, Z. Ni, and S. Zhuang, "A new structure of multi-layer phosphor package of white LED with high efficiency," Chin. Opt. Lett. 8, 221-223 (2009).
25 Z.-Y. Liu, S. Liu, K. Wang, and X.-B. Luo, "Measurement and numerical studies of optical properties of YAG:Ce phosphor for white light-emitting diode packaging," Appl. Opt. 49, 247-57 (2010).   DOI
26 N. D. Q. Anh, M. F. Lai, H. Y. Ma, and H. Y. Lee, "Enhancing of correlated color temperature uniformity for multi-chip white-light LEDs by adding $SiO_2$ to phosphor layer," J. Chin. Inst. Eng. 38, 297-303 (2015).   DOI