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Impact of phosphor granule magnitudes as well as mass proportions on the luminous hue efficiency of a coated white light-emitting diode and one green phosphor film

H. T. TUNG1, N. D. Q. ANH2,* , H. Y. LEE3

Affiliation

  1. Faculty of Basic Sciences, Vinh Long University of Technology Education, Vinh Long Province, Vietnam
  2. Faculty of Electrical and Electronics Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam
  3. Department of Electrical Engineering, National Kaohsiung University of Sciences and Technology, Kaohsiung City, Taiwan

Abstract

By using the hot pressing technique, green phosphor sheets having various silica sap/mass proportions as well as granule proportions were created. The laminated white LED (WLED) was packaged on one near-ultraviolet (n-UV) LED chip under 405 nm, and its linked hue temperature, illuminating effectiveness of radiation, light hue homogeneity, and hue coordinate were measured. The effectiveness and light hue homogeneity of the sheets as well as coated WLED device can be enhanced via elevating the mass proportion as well as decreasing the granule magnitude. These changes may also have a significant impact on the dispersion coefficient for phosphor’s photonic granules as well as the effectiveness for the absorptivity-excitation-discharge activity. Using a laminate having one mass proportion reaching 6:0.75 silica sap to phosphor, the ideal value of the WLED was discovered after thorough study of various light hue parameters. The IES TM30 standard states that the Rg and chroma disparity both exhibited enhanced saturation applying to the chroma green, while the Rf achieved 92 and 101, respectively. Given that it has a light effectiveness for radioactivity reaching 270.21 lm W-1 , a corresponding hue heat level reaching 4423 K, and median white features, the device is ideal for lighting uses.

Keywords

White LED, Lambert-Beer law, Color rendering index, Luminous efficacy.

Citation

H. T. TUNG, N. D. Q. ANH, H. Y. LEE, Impact of phosphor granule magnitudes as well as mass proportions on the luminous hue efficiency of a coated white light-emitting diode and one green phosphor film, Optoelectronics and Advanced Materials - Rapid Communications, 18, 1-2, January-February 2024, pp.58-65 (2024).

Submitted at: July 27, 2023

Accepted at: Feb. 9, 2024