Improving luminous flux and color homogeneity of dual-layer phosphor sctructure

• Published in: Telkomnika Vol. 17; no. 5; pp. 2643 - 2649
• Main Authors: Trang, Tran Thanh, Le, Phan Xuan, Quoc Anh, Nguyen Doan
• Format: Journal Article
• Language: English
• Published: Yogyakarta Ahmad Dahlan University 01.10.2019
• Subjects: Colorimetry; Efficiency; Europium; Illumination; Influence; Light emitting diodes; Light sources; Lighting; Monte Carlo simulation; Optical properties; Optics; Phosphors; Quantum dots
• ISSN: 1693-6930; 2302-9293
• DOI: 10.12928/telkomnika.v17i5.11038

(ProQuest: ... denotes formulae omitted.) 1.Introduction In recent times, LEDs has been considered as a promising product in the future owing to its superior properties for lighting technology such as high illumination, high energy efficiency, and long lifetimes [1-5]. [...]MCW-LEDs is extensively applied in a variety of general-purpose illumination applications, which completely replaced all of the traditional light sources [6]. [...]if it is compared to these two absorptions, the blue light absorbed by the LED chip is stronger due to the absorption properties of the material. [...]the green light composition in WLEDs increases with the addition of SrBaSiO4:Eu2+, which leads to an increase in colorimetric index. [...]some current studies provide a color rendering index (CRI), which can evaluate the true color of the object when the light is shining. [...]there is still a small disadvantage for CRI that is when the concentration of SrBaSiÜ4:Eu2+ exceeds, CRI decreases dramatically. [...]the choice of suitable concentration becomes important, depending on the manufacturer's goal and the article provided important information for reference in the production of color-coordinated WLEDs and better luminous flux.