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

作者：Ren, Yandong^*; Liu, Yonghao; Yang, Rui

来源：Superlattices and Microstructures, 2016, 91: 138-147.

DOI：10.1016/j.spmi.2015.12.026

• SrWO4
• Energy transfer
• Phosphor
• Warm white LEDs

A series of wide-range-tunable light emissive SrWO4:Sm3+, SrWO4:Sm3+,Eu3+ phosphors were synthesized via the simple co-precipitation method. The charge compensation can greatly improve SrWO4: Sm3+ phosphors luminous intensity. The critical distance, eta(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 Sm3+ ions concentration, excitation wavelength or Sm3+, Eu3+ 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 Y2O2S:Eu3+ 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.

• 出版日期2016-3
• 单位大庆师范学院