Preparation and luminescence characteristics of LiYF4: Tm3+/Dy3+ single crystals for white-light LEDs

Fabrication, tunable fluorescence emission and energy transfer of Tm3+‐Dy3+ co‐activated P2O5–B2O3–SrO–K2O glasses

“…Fluorescence glasses doped with RE ions capture researchers' attention due to high transparency, easy preparation, strong mechanical hardness, excellent moisture resistance, thermal stabilities . They can emit multi‐colors or white light by doping different rear‐earth (RE) under the appropriate excited wavelength due to the existence of the efficient 4f‐4f and 4f‐5d electronic transitions of RE ions . Many RE ions‐doped glasses have been reported.…”

“…It is known that Tm 3+ ions mainly emit 452 nm blue light ( 1 D 2 → 3 F 4 transition) and Dy 3+ ions mainly emit 485 nm blue light ( 4 F 9/2 → 6 H 15/2 transition) and 575 nm orange light ( 4 F 9/2 → 6 H 13/2 transition). The incorporation of blue light and orange light in Tm 3+ /Dy 3+ co‐doped fluorescence glass can efficiently obtain white light with a high color rendering index, arousing researcher's interest in commercial application of w‐LED lighting field …”

“…[10][11][12] They can emit multi-colors or white light by doping different rear-earth (RE) under the appropriate excited wavelength due to the existence of the efficient 4f-4f and 4f-5d electronic transitions of RE ions. 4,[13][14][15] Many RE ions-doped glasses have been reported. For example, Dy 3+ ions doped lithium alumino-borate glass, 11 Dy 3+ /Tb 3+ ions co-doped borate glass, 12 Tm 3+ /Tb 3+ / Eu 3+ (Sm 3+ ) tri-doped zinc borate/phosphate glass.…”

“…The incorporation of blue light and orange light in Tm 3+ /Dy 3+ co-doped fluorescence glass can efficiently obtain white light with a high color rendering index, arousing researcher's interest in commercial application of w-LED lighting field. 14,[17][18][19] Optical studies show that the radiative properties of REdoped glasses are strongly dependent on the glass structure, which can be modified by appropriate network formers and modifiers. Among all glasses, oxide glasses with excellent optical performance and good thermal stability are attractive hosts.…”

Enhanced Luminescent Properties in Tm3+/Dy3+Co-doped Transparent Phosphate Glass Ceramic

“…Generally, W-LEDs can be fabricated by combining GaN-based blue chips with YAG: Ce 3+ yellow phosphors [4]. However, this combination still have some inherent drawbacks such as poor heat resistance, high correlated color temperature and low color rendering index due to their low thermal quenching temperature and lack of red emitting element [5]. In order to overcome the problems thoroughly, the rare-earth (RE) doped phosphors have been achieved great important applications in the development of W-LEDs [6][7][8][9][10][11].…”