Bindai, Shuvamoy and Annapurna, K and Tarafder, Anal (2019) Realization of phosphor-in-glass thin film on soda-lime silicate glass with low sintering temperature for high color rendering white LEDs. Applied Optics, 58 (9). pp. 2372-2381. ISSN 0003-6935

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Y3Al5O12:Ce3+ phosphor-in-glass (PiG) thin film on soda-lime silicate glass substrate has been applied using screen-printing method for generation of white LED light in modern day lighting. In this work, a glass composition in a ZnO-Bi2O3-B2O3 system has been optimized to have low softening temperature, as well as matching the refractive index with that of Y3Al5O12:Ce3+ phosphor. The sintering of the PiG layers was performed at a relatively low temperature of 560 degrees C to avoid the chemical degradation of the phosphors. We employed a combination of powder x-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, UV-visible absorption and fluorescence spectroscopy, as well as Fourier transfer infrared spectroscopy to study the detailed structure and different spectral properties of PiG samples. This Y3Al5O12:Ce3+-based PiG exhibits an external quantum efficiency of similar to 40%, even with its thickness of only 5 mu m. Under the excitation of the blue laser diode source, the synthesized PiG thin film has exhibited a bright white light with high color rendering index (CRI = 92 and CCT = 3877 K). The synthesized PiG sample was used to design a high-power white-light-emitting diode module by combining it with a 3 W blue LED on-board chip. This module is expected to be a promising candidate for next-generation illumination at a relatively lower cost, with long-term reliability. (C) 2019 Optical Society of America

Item Type: Article
Subjects: Glass
Divisions: Glass
Depositing User: Bidhan Chaudhuri
Date Deposited: 07 Nov 2019 10:38
Last Modified: 07 Nov 2019 10:38

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