In:
RSC Advances, Royal Society of Chemistry (RSC), Vol. 13, No. 36 ( 2023), p. 25069-25080
Abstract:
Eu 3+ -doped phosphors have been much attractive owing to their narrow-band red emission peak at 610–630 nm with high color purity; however, the weak and narrow absorption band in the NUV region limits their applications. Doping a higher amount of Eu 3+ ions into a non-concentration quenching host could be key to enhancing the efficiency of the absorption value and emission intensity. Hence, the design of Eu 3+ -heavily doped phosphors with a suitable host lattice is key for applications. In this study, red-emitting Eu 3+ -doped Gd(BO 2 ) 3 -Y 3 BO 6 -GdBO 3 (GdYGd:Eu 3+ ) phosphor with a high quantum efficiency of 58.4% and excellent color purity of 99.5% is reported for the first time. The phosphor is efficiently excited by NUV light at 394 nm and emits a strong red emission band in the 590–710 nm range, peaking at 612 nm. The optimal annealing temperature and Eu 3+ doping content to obtain the strongest PL intensity are 1100 °C and 20 mol%, respectively. The optimized GdYGd:Eu 3+ phosphor possesses a high activation energy of 0.319 eV and a lifetime of 1.14 ms. An illustration of phosphor-coated NUV LED with chromaticity coordinates ( x = 0.5636, y = 0.2961) was successfully synthesized, demonstrating the great potential of GdYGd:Eu 3+ phosphor for NUV-pumped WLED applications.
Type of Medium:
Online Resource
ISSN:
2046-2069
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
2623224-8
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