Narrowband ultraviolet B emission from gadolinium activated Y3Ga5O12 nano-garnets. (January 2018)

• Record Type: Journal Article
• Authors: Pathak, M.S.; Singh, N.; Singh, Vijay; Watanabe, S.; Rao, T.K.Gundu; Lee, Jung-Kul
• Is Part Of: Materials research bulletin. Volume 97(2018)
• Page Start: 512
• Page End: 516
• Publication Date: 2018-01
• Subjects: Combustion -- Nanocrystalline garnet -- Gd3+ ions -- Y3Ga5O12 -- ESR -- Photoluminescence; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2017.09.002
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: A narrowband ultraviolet B emitting nano-garnet was synthesized. Narrow band centered at 311.9 nm, good for phototherapy application. EPR results indicate the possible location of the Gd 3+ ion. Gd 3+ ion is likely to be located at the distorted dodecahedral site. Abstract: Gadolinium (Gd 3+ ) doped Y3 Ga5 O12 nanocrystalline garnet was prepared by nitrate-fuel combustion technique that involves organic fuel glycine. Sample characterization was performed by powder X-ray diffraction and scanning electron microscope. Upon ultraviolet light excitation at 273 nm, Y3 Ga5 O12 :Gd 3+ sample exhibits a sharp narrowband ultraviolet B emission at 311.9 nm. The electron spin resonance spectrum of gadolinium doped Y3 Ga5 O12 samples exhibit resonance signals with the effective g values at g ≈2.0, 2.2 and 5.8. These signals are attributed to Gd 3+ ion located in distorted surroundings experiencing a relatively strong crystal field.