α-SrO·3B2O3:Sm2+ and SiO2: A novel application for improving color rendering index and luminous flux of remote phosphor white LEDs
Tóm tắt: 16
| 
PDF: 15 
##plugins.themes.academic_pro.article.main##
Author
Từ khóa:
YAG
Ce
α-SrO·3B2O3:Sm2
SiO2
Color rendering index
Luminous efficiency
Tóm tắt
This paper presents a novel application of SrO·3B2O3:Sm2+ and SiO2 compound for improving the color rendering index (CRI) and the luminous efficacy (LE) of white LEDs. 2%-30% α-SrO·3B2O3:Sm2+ and 5% SiO2 is added to the remote-phosphor layer in LightTools simulations. The obtained results indicated that LE increases with low α-SrO·3B2O3:Sm2+ concentration. If more than 18% α-SrO·3B2O3:Sm2+ are employed, then the LE tends to be reduced. In addition, the red component of remote-phosphor layer should be enhanced with the increasing of α-SrO·3B2O3:Sm2+, which results in higher CRI values. The above results is explained by Mie-scattering theory, i.e., through the computation of scattering parameters of α-SrO·3B2O3:Sm2+, including scattering coefficient and anisotropy scattering value.
Tài liệu tham khảo
-
[1] T. Kohsei, K. Yoshimura, M. Harada, Y. Tomomura, T. Takeda, R.-J. Xie and N. Hirosaki, “On the origin of fine structure in the photoluminescence spectra of the β-sialon:Eu2+ green phosphor”, J. Sci. Tech. Adv. Mater. 13(1), Taylor & Francis, 2012, (1-5).
[2] C. Santa, T. Roy, K. Majumder and A. Yadav, “Red enhanced YAG:Ce, Pr nanophosphor for white LEDs”, J. Exp. Nanosci. 9(8), Taylor & Francis, 2014, (776-784).
[3] S. Changyu, J. Chu, F. Qian, X. Zou, C. Zhong, K. Li and S. Jin, “High color rendering index white LED based on nano-YAG:Ce3+ phosphor hybrid with CdSe/CdS/ZnS core/shell/shell quantum dots”, J. Mod. Opt. 59 (14), Taylor & Francis, 2012, (1199-1203).
[4] H. Yu, W. W. Zi, S. Lan, H. F. Zou, S. C. Gan, X. C. Xu and G. Y. Hong, “Photoluminescence Characteristics of Novel Red Emitting Phosphor Li2SrSiO4:Eu3+, Sm3+ for White Light Emitting Diodes”, Mater. Res. Inno. 16(4), Taylor & Francis, 2012, (298-302).
[5] K. N. Shinde, and S. J. Dhoble, “Europium-Activated Orthophosphate Phosphors For Energy-Efficient Solid-State Lighting: A Review”, J. Crit. Rev. Solid State Mater. Sci. 39(60), Taylor & Francis, 2014, (459-479).
[6] N. D. Q. Anh, M. F. Lai, H. Y. Ma, H. Y. Lee, “Enhancing of correlated color temperature uniformity for multi-chip white-light LEDs by adding SiO2 to phosphor layer”, J. Chin. Inst. Eng. 38(3), Taylor & Francis, 2015, (297-303).
[7] M. F. Lai, N. D. Q. Anh, H. Y. Ma, H. Y. Lee, “Scattering effect of SiO2 particles on correlated color temperature uniformity of multi-chip white light LEDs”, J. Chin. Inst. Eng. 39(4), Taylor & Francis, 2016, (1-5).
[8] K. K. Seong, T. W. Yoo, B.-S. Kim, S. M. Lee, Y. S. Lee and L. S. Park, “White LED Packaging with Layered Encapsulation of Quantum Dots and Optical Properties”, J. Mol. Cryst. Liq. Cryst. 564(1), Taylor & Francis, 2012, (33-41).
[9] M. F. Lai, N. D. Q. Anh, H. Y. Ma, H. Y. Lee, “Effects of Ce0.67 Tb0.33 MgAl11 O19:Ce,Tb phosphor on optical performance of multi-chip white LEDs”, Proceedings of Optics & Photonics of Taiwan International Conference, OPTIC, 2014.
[10] S.-P. Ying, H.-K. Fu, and H.-Z. Tu, “Curved remote phosphor structure for phosphor-converted white LEDs”, Appl. Opt. 53(29), The Optical Society, 2014, (H160-H164).
[11] S.-P. Ying, and A.-Y. Shiu, “Investigation of remote-phosphor white light-emitting diodes with improved scattered photon extraction structure”, Appl. Opt. 54(28), The Optical Society, 2015, (E30-E34).
[12] W. M. Yen, and M. J. Weber, Inorganic Phosphors: Compositions, Preparation and Optical Properties, CRC Press, 2004.
[13] K. Chandramouli, S. H. Cho, Y. S. Jung, K.-S. Sohn, “Deep Red Color Emission in Sm2+ doped SrB4O7 Phosphor”, J. Electrochem. Soc. 154 (3), Electrochemical Society, 2007, (J86-J90).
[14] Gyanendra, S., and D. S. Mehta, “White-light generation using a remote-phosphor-coated diffusing surface excited by the high-brightness blue light-emitting diode”, J. Inf. Disp. 15 (2), Taylor & Francis, 2014, (91-98).
[15] 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(2), The Optical Society, 2010, (247-257).
[16] N. D. Q. Anh, H. Y. Lee, T. T. Phuong, N. H. K. Nhan, T. H. Q. Minh and T. H. Ly, “Y2O3:Eu3+ phosphor: a novel solution for an increase in color rendering index of multi-chip white LED package”, J. Chin. Inst. Eng. 40. Taylor & Francis, 2017, (1-7).
Xem thêm
##plugins.themes.academic_pro.article.sidebar##
Đã Xuất bản
Jun 30, 2017
Download
Cách trích dẫn
Anh Q. D. Nguyen, Thuong T. Nguyen, Thu H. T. Vu, Le X. Phan. “α-SrO·3B2O3:Sm2+ and SiO2: A Novel Application for Improving Color Rendering Index and Luminous Flux of Remote Phosphor White LEDs”. Tạp Chí Khoa học Và Công nghệ - Đại học Đà Nẵng, vol 6, số p.h 115, Tháng Sáu 2017, tr 1-3, https://jst-ud.vn/jst-ud/article/view/2532.
