Fluorescence enhancement of oxide fluoride glass co-doped with TbF3 and SmF3

White emitting phosphors based on glasses of the type 10AlF3–10TiO2–39PbO–30H3BO3–10SiO2–xEu2O3–(1−x)Tb2O3: An energy transfer study

“…In the multi-component matrix glass of the composition 10AlF 3 -10TiO 2 -40PbO-30H 3 BO 3 -10SiO 2 In AFTPBS-xEu-(1 À x)Tb glasses after 376 nm excitation the initial populations of 4f higher energy levels of Tb 3 þ ions relaxed non-radiatively to the lower energy level 5 D 3 and then due to cross-relaxation type of energy transfer to neighbor Tb 3 þ ions they arrived the 5 D 4 emitting level. The Tb 3 þ in the excited state 5 D 4 is able to transfer energy to 5 D 0 level of Eu 3 þ .…”

“…Emission in this case is attributed to 4f-4f and 4f-5d electronic transitions in the lanthanoid(III) [2]. The 4f electrons in the lanthanoids are well shielded beneath an outer electron configuration 5s 2 and 5p 2 , and so they are little influenced by the crystal or amorphous surroundings if they play a dopant role.…”

Luminescent spectroscopy of TbF3 and TbF3–SmF3–HoF3–PrF3 crystals

“…The Sm 3+ ion is the least investigated lanthanide ion, with the exception of the Pm 3+ [4]. The data on the Tb 3+ and Sm 3+ ion interaction in the 'nonstoichiometric luminescent compounds' matrices point out the possibility of the strong interaction between the ions [11][12][13][14][15].…”

Energy transfer based emission analysis of (Tb3+, Sm3+): Lithium zinc phosphate glasses

“…From the energy level diagram as seen in Fig. 11, 5 D 4 state of Tb 3+ lies above the Sm 3+ ( 4 G 5/2 ) state, so energy can be transferred from Tb 3+ to Sm 3+ ( 4 G 5/2 ) state [20][21][22][23][24][25][26][27].…”