Role of rare-earth ions for energy-saving LED lighting devices

Satpute, Nutan S.; Dhoble, S.J.

doi:10.1016/b978-0-12-823710-6.00018-2

Cited by 7 publications

(1 citation statement)

References 150 publications

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“…White light-emitting diodes (WLEDs) have been extensively used for three decades in both residential and industrial lighting and typically employ yellow phosphor powder, cerium-doped yttrium aluminum garnet (Ce: YAG) paired with blue chip InGaN-based light-emitting diodes (LEDs) [1]. Compared to conventional incandescent light sources such as tungsten filament bulbs, WLED technology offers less energy consumption and a more environmentally friendly fabrication process [2]. WLED backlights are also used in liquid-crystal displays (LCDs) that are manufactured in their current form (i.e., singlechip blue mixed yellow phosphor or combined red, green, and blue phosphor multichips) and are widely used because of their high efficiency and low cost [3].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Narrow-Wavelength Phosphors of Tb-Doped Yttrium-Silicon-Aluminum Oxynitride Using Spray Pyrolysis

Aji,

Huang,

Oishi

et al. 2023

Ceramics

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Selective emission of green light phosphor powder Y4SiAlO8N as the host material and Tb3+ as the activator was successfully achieved using spray pyrolysis (SP). Samples synthesized with various calcination temperatures and precursor concentrations indicated that the most suitable parameter for the synthesized powder is the calcination of 0.05 M Y3.92SiAlO8N:0.08Tb3+ at a temperature of 1600 °C. The effect of the selected parameters was substantiated by the high purity of the Y3.92SiAlO8N:0.08Tb3+ phase, as confirmed by X-ray diffraction (XRD) analysis. The Scherrer equation was used to calculate grain size. In addition, scanning electron microscopy (SEM) and energy-dispersive X-ray spectrometry (EDS) confirmed the presence of micron-sized particles, which matched well with the theoretical chemical composition. The specific surface area of the phosphor powder was determined using the Brunauer–Emmett–Teller method. Finally, fluorescence spectrometry was used to determine the luminescence properties. The correlation between the crystallinity of the phosphor powder and narrowing emission is also discussed.

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Section: Introductionmentioning

confidence: 99%