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Effect of red-emitting SrB8O13:Sm2+ phosphor on the color rendering property of white LEDs

N. D. Q. ANH1, P. X. LE2, H. Y. LEE3,*

Affiliation

  1. Faculty of Electrical & Electronics Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam
  2. Faculty of Electrical and Electronics Engineering, HCMC University of Food Industry, Ho Chi Minh city, Vietnam
  3. Department of Electrical Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung, Taiwan

Abstract

In this study, red-emitting SrB8O13:Sm2+ phosphor is proposed to enhance the color rendering property (CRP) of white lightemitting diodes (WLEDs). Through LightTools we carry out the simulations by employing the two phosphor geometries like the conformal phosphor geometry and the in-cup phosphor geometry. To verify the obtained results, the scattering properties of phosphor layer after adding SrB8O13:Sm2+ are computed by using Mie-scattering theory. Moreover, the relationship between the lumen output and the extinction coefficient is presented through the Lambert-Beer law. The principal merits of this solution is to increase the CRP of 8500 K WLEDs to a value greater than 86..

Keywords

SrB8O13:Sm2+, Mie-scattering theory, Lambert-Beer law, Color rendering property, Extinction coefficient.

Citation

N. D. Q. ANH, P. X. LE, H. Y. LEE, Effect of red-emitting SrB8O13:Sm2+ phosphor on the color rendering property of white LEDs, Optoelectronics and Advanced Materials - Rapid Communications, 12, 3-4, March-April 2018, pp.158-163 (2018).

Submitted at: Sept. 12, 2017

Accepted at: April 5, 2018