Abstract
In last few decades, Light emitting diode (LED) with a series of excellence advantages is considered as the next generational light source. In this research, by co-doping the Green-emitting CaF2:Ce3+, Tb3+ phosphor to yellow-emitting YAG:Ce phosphor compound, an innovative approach for improving optical properties of the 8500 K in-cup phosphor packaging white LED lamps (WLEDs) is proposed, investigated, and demonstrated. By using Mie Theory with Mat Lab and Light Tool software, the obtained results show that the optical properties of the 8500 K in-cup phosphor packaging WLEDs is significantly influenced by the Green-emitting CaF2:Ce3+, Tb3+ phosphor’s concentration. From the research results, the correlated color temperature deviation (D-CCT) decreased from 9200 K to 3700 K, and the luminous flux increased from 940 lm. to 1500 lm., respectively. The results indicated that the green-emitting CaF2:Ce3+, Tb3+ phosphor could be considered as a potential solution for manufacturing the in-cup packaging phosphor WLEDs with high CCT shortly.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Liu, S., Luo, X.: Design, Manufacturing and Testing. Wiley, Beijing (2011)
Luo, X., Hu, R., Liu, S., Wang, K.: Heat and fluid flow in high-power LED packaging and applications. Prog. Energy Combust. Sci. 56, 1–32 (2016). https://doi.org/10.1016/j.pecs.2016.05.003
Nair, G.B., Dhoble, S.J.: A perspective perception on the applications of light-emitting diodes. Luminescence 30(8), 1167–1175 (2015). https://doi.org/10.1002/bio.2919
Liu, Z., Liu, S., Wang, K., Luo, X.: Studies on optical consistency of white LEDs affected by phosphor thickness and concentration using optical simulation. IEEE Trans. Compon. Packag. Technol. 33(4), 680–687 (2010). https://doi.org/10.1109/tcapt.2010.2044576
Sun, C., Chang, Y., Yang, T., Chung, T., Chen, C., Lee, T., Liu, C.: Packaging efficiency in phosphor-converted white LEDs and its impact to the limit of luminous efficacy. J. Solid State Light. 1(1), 19 (2014). https://doi.org/10.1186/s40539-014-0019-0
Schubert, E.F.: Solid-state light sources getting smart. Science 308(5726), 1274–1278 (2005). https://doi.org/10.1126/science.1108712
Markus, S., Rosenthal, T., Oecklera, O., Schnick, W.: Highly efficient pc-LED phosphors Sr1-xBaxSi2O2N2:Eu2+(0 × 1) - crystal structures and luminescence properties revisited. Crit. Rev. Solid State Mater. Sci. 39(3), 215–229 (2014). https://doi.org/10.1080/10408436.2013.863175
Liu, L., Xie, R.-J., Hirosaki, N., Takeda, T., Zhang, C., Li, J., Sun, X.: Photoluminescence properties of β-SiAlON:Yb2+, a novel green-emitting phosphor for white light-emitting diodes. Sci. Technol. Adv. Mater. 12(3), 034434 (2011). https://doi.org/10.1088/1468-6996/12/3/034404
Shuai, Y., He, Y., Tran, N.T., Shi, F.G.: Angular CCT uniformity of phosphor-converted white LEDs: effects of phosphor materials and packaging structures. IEEE Photonics Technol. Lett. 23(3), 137–139 (2011). https://doi.org/10.1109/LPT.2010.2092759
Yu, H., Zi, W.W., Lan, S., Zou, H.F., Gan, S.C., Xu, X.C., Hong, G.Y.: Photoluminescence characteristics of novel red-emitting phosphor Li2SrSiO4:Eu3+, Sm3+ for white light emitting diodes. Mater. Res. Innov. 16(4), 298–302 (2012). https://doi.org/10.1179/1433075X12Y.0000000013
Quoc Anh, N.D., Lai, M.F., Ma, H.Y., Lee, H.Y.: Enhancing of correlated color temperature uniformity for multi-chip white-light LEDs by adding SiO2 to phosphor layer. J. Chin. Inst. Eng. 38(3), 297–303 (2015). https://doi.org/10.1080/02533839.2014.981214
Lai, M.F., Quoc Anh, N.D., Ma, H.Y., Lee, H.Y.: Scattering effect of SiO2 particles on correlated color temperature uniformity of multi-chip white light LEDs. J. Chin. Inst. Eng. 39(4), 468–472 (2016). https://doi.org/10.1080/02533839.2015.1117950
Quang Minh, T.H., Khanh Nhan, N.H., Quoc Anh, N.D., Lee, H.-Y.: Red-emitting α-SrO·3B2O3:Sm2 phosphor: an innovative application for increasing color quality and luminous flux of remote phosphor white LEDs. J. Chin. Inst. Eng. 40(4), 313–317 (2017). https://doi.org/10.1080/02533839.2017.1318720
Tapaninen, O.: Optical and thermal simulation chain for LED package. In: 17th International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE), Montpellier (2016). doi:10.1109/EuroSimE.2016.7463349
Fu, Q., Sun, W.: Mie theory for light scattering by a spherical particle in an absorbing medium. Appl. Opt. 40(9), 1354 (2001). https://doi.org/10.1364/ao.40.001354
Chalut, K.J., Giacomelli, M.G., Wax, A.: Application of Mie theory to assess structure of spheroidal scattering in backscattering geometries. J. Opt. Soc. Am. A 25(8), 1866 (2008). https://doi.org/10.1364/josaa.25.001866
Zhong, J., Xie, M., Ou, Z., Zhang, R., Huang, M., Zhao, F.: Mie theory simulation of the effect on light extraction by 2-D nanostructure fabrication. In: 2011 Symposium on Photonics and Optoelectronics (SOPO), May 2011. doi:10.1109/sopo.2011.578056
Acknowledgements
The authors appreciate the support of Professor Hsiao-Yi Lee, Department of Electrical Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung, Taiwan.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2018 Springer International Publishing AG
About this paper
Cite this paper
Quang Minh, T.H., Vu, L.A. (2018). Improving the Optical Properties of the 8500 K In-cup Packaging WLEDs by Using the Green-emitting CaF 2 :Ce 3+ , Tb 3+ Phosphor. In: Duy, V., Dao, T., Zelinka, I., Kim, S., Phuong, T. (eds) AETA 2017 - Recent Advances in Electrical Engineering and Related Sciences: Theory and Application. AETA 2017. Lecture Notes in Electrical Engineering, vol 465. Springer, Cham. https://doi.org/10.1007/978-3-319-69814-4_21
Download citation
DOI: https://doi.org/10.1007/978-3-319-69814-4_21
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-69813-7
Online ISBN: 978-3-319-69814-4
eBook Packages: EngineeringEngineering (R0)