Tunable single-phased white-emitting Sr3Y(PO4)3:Dy3+ phosphors for near-ultraviolet white light-emitting diodes. Issue 11 (1st August 2017)

• Record Type: Journal Article
• Authors: Woo Seo, Yeon; Heum Park, Sung; Hyoung Chang, Seo; Hyun Jeong, Jung; Ho Kim, Kwang; Bae, Jong-Seong
• Is Part Of: Ceramics international. Volume 43:Issue 11(2017)
• Page Start: 8497
• Page End: 8501
• Publication Date: 2017-08-01
• Subjects: Sr3Y(PO4)3 -- Dy3+ -- Luminescence -- White LED -- Phosphors; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2017.03.205
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Single-component white-emitting Sr3 Y(PO4 )3 :Dy 3+ phosphors were synthesized by a high-energy deformation process. X-ray diffraction patterns showed the resulting crystallized phase to be of cubic structure, space group I-43d (no. 220). The broad-band excitation spectra between 250 and 500 nm were observed by monitoring the emission wavelength at 576 nm, which matches well with commercial near-UV or blue LED chips. Under a 352 nm excitation, the emission peaks were observed at 483 nm (blue), 576 nm (yellow), and 666 nm (red), corresponding to the 4 F9/2 → 6 H15/2, 4 F9/2 → 6 H13/2, and 4 F9/2 → 6 H11/2 transitions of Dy 3+ ions. The optimized doping concentration of Dy 3+ ion was 8 mol%. By controlling the Dy 3+ ion concentration, tunable colors from white to yellow were obtained in Sr3 Y(PO4 )3 :Dy 3+ phosphors. These results reveal that studied materials may be a promising candidate for white LED applications.