A series of color tunable yellow–orange–red-emitting SrWO4:RE (Sm3+, Eu3+–Sm3+) phosphor for near ultraviolet and blue light-based warm white light emitting diodes. (March 2016)

• Record Type: Journal Article
• Authors: Ren, Yandong; Liu, Yonghao; Yang, Rui
• Is Part Of: Superlattices and microstructures. Volume 91(2016)
• Page Start: 138
• Page End: 147
• Publication Date: 2016-03
• Subjects: SrWO4 -- Energy transfer -- Phosphor -- Warm white LEDs; Superlattices as materials -- Periodicals; Microstructure -- Periodicals; Semiconductors -- Periodicals; Superréseaux -- Périodiques; Microstructure (Physique) -- Périodiques; Semiconducteurs -- Périodiques; 621.38152
• DOI: 10.1016/j.spmi.2015.12.026
• Languages: English
• ISSNs: 0749-6036

Abstract

Abstract: A series of wide-range-tunable light emissive SrWO4 :Sm 3+, SrWO4 :Sm 3+, Eu 3+ phosphors were synthesized via the simple co-precipitation method. The charge compensation can greatly improve SrWO4 : Sm 3+ phosphors luminous intensity. The critical distance, η T and energy transfer mechanism of SrWO4 :0.01Sm 3+, 0.12Eu 3+ were studied. These obtained phosphors exhibit a high luminous efficiency, purity and lower color temperature of the comfortable warm white LEDs. Hues varying have been generated by appropriately tuning the Sm 3+ ions concentration, excitation wavelength or Sm 3+, Eu 3+ co-doping, which have the color tunable wide gamut light covering the yellow–green, greenish-yellow, yellow, yellow orange, orange, reddish orange and red chromaticity region. In particular, SrWO4 :0.01Sm 3+, 0.12Eu 3+ phosphors excited at 404 and 480 nm have higher color saturation than commercially available Y2 O2 S:Eu 3+ red phosphor. These phosphors can be excited efficiently using commercial ultraviolet, blue laser diodes and LEDs, and can be used for developing new color light sources, fluorescent display devices, ultraviolet-sensors and tunable visible lasers. Highlights: We synthesized wide-range-tunable light emissive phosphors by simple co-precipitation method. The charge compensation can greatly improve SrWO4 : Sm 3+ phosphors luminous intensity. These phosphors exhibit a high luminous efficiency, purity and lower color temperature. The color tunable light covering the yellow–green, yellow, orange and red chromaticity region. The red phosphors have higher color saturation than commercially available Y2 O2 S:Eu 3+ phosphors.