Tunable light emission mediated by energy transfer in Tm3+/Dy3+ co-doped LaF3 nanocrystals under UV excitation

Improving thermal stability of novel single-component white-light emitting phosphor Ca8MgLu(PO4)7:Tm3+, Dy3+ by back-energy-transfer

“…Being similar to Tm 3+ singly-doped situation, the lifetimes of 1 D 2 manifold of Tm 3+ decreases along with increasing Dy 3+ doping content. The ET efficiency from sensitizer to activator can be expressed as: [29] (2)…”

“…Tm 3+ is one of the blue emitting activators [25] and is found to be an excellent sensitizer for Dy 3+ ions. [26] The co-doping method has been found in many hosts, such as NaGd(WO 4 ) 2 , [27] K 2 Y(WO 4 )(PO 4 ), [28] LaF 3 , [29] LiNbO 3 single crystals, [30] Ba 0.05 Sr 0.95 WO 4 [31] and so on. And the above reports present the white light can be generated by adjusting the doping concentrations of Tm 3+ and Dy 3+ ions.…”

Wide visible-range fluorescence of Eu3+ located in the macroscopic bi-layer ceramic/glass composite

“…[5][6][7] For this purpose, multiple luminescence centers in the phosphors are widely adopted to achieve high brightness and high color rendering index of white light emission. [8][9][10][11][12] However, rare earth (RE) co-doping leads to complex cross relaxation processes, which cannot release photons efficiently. In view of the high uorescence quantum efficiency in visible white light illumination, the exploration focusing on the compound material with single RE 3+ ions doping and multi-channel emission becomes urgent.…”

Color‐tunable and white emission of Tm3+ doped transparent zinc silicate glass‐ceramics embedding ZnO nanocrystals

“…On the other hand, rare earth (RE) ions, which possess 4f → 4f transition with narrow and strong band emission, have been widely used to gain abundant emission colors . Among RE ions, Tm 3+ has attracted much attention recently because it provides blue luminescence with appropriate lifetime and color‐rendering properties . It is well known that yellow and blue lights in appropriate proportions could generate white light .…”

“…Among RE ions, Tm 3+ has attracted much attention recently because it provides blue luminescence with appropriate lifetime and color‐rendering properties . It is well known that yellow and blue lights in appropriate proportions could generate white light . Considering that the efficient white luminescence significantly depends on the yellow‐to‐blue intensity ratio, white light is expected to be generated by adjusting the heat treatment condition, pumping source and RE ion doping content, which are the key factors that affect the yellow emission from ZnO as well as blue emission of Tm 3+ ions.…”