Energy transfer based emission analysis of Dy3+/Eu3+ co-doped ZANP glasses for white LED applications

Tailoring the luminescence of Eu3+ co-doped Dy3+ incorporated aluminofluoro-borophosphate glasses for white light applications

“…N 0 is the concentration of the acceptor ions in ions/cc which is almost equal to the concentration of the RE 3 þ ions and R 0 is the critical transfer distance defined as the donor-acceptor separation for which the rate of energy transfer between the donor and acceptor is equal to the intrinsic decay rate (τ 0 À 1 ) of the donor. The non-exponential nature of the decay profile are well fitted to the I-H model with S ¼6 thus indicates that dipole-dipole interaction dominates between Dy 3 þ and Eu 3 þ ions in the prepared BPADxE glasses similar to the reported literature [42]. The donor-acceptor interaction parameter…”

“…Sample code 612 nm is due to the 5 D 0 -7 F 2 transition of the Eu 3 þ ion [28,42]. The emission intensity of the 4 F 9/2 -6 H 13/2 electric dipole transition dominates the magnetic dipole transition ( 4 F 9/2 -6 H 15/2 ) thus confirms the higher asymmetry around the Dy 3 þ ion site.…”

“…The excitation of the Dy 3 þ ions increases the lifetime of the ( 5 D 0 state) Eu 3 þ ions thus confirm the energy transfer takes place from Dy 3 þ ions to Eu 3 þ ions. From the lifetime measurements, the energy transfer efficiency (η ET ) [28] and the probability of the energy transfer P ET ¼ 1 τ d À 1 τ d0 , where τ do is the intrinsic decay time of the donor in the absence of an acceptor and τ d is the lifetime of the donor in the presence of the acceptor [42] have been calculated and the results are presented in Table 7. The energy transfer efficiency is found to increase from 2% to 12% while increasing the Eu 3 þ ions concentration.…”

Tunable colors and applications of Dy3+/Eu3+ co‐doped CaO‐B2O3‐SiO2 glasses

“…As a classic red‐luminescence activator, relative emission intensities of different f ‐ f transitions of Eu 3+ can be controlled by varying glass compositions . Therefore, Dy 3+ /Eu 3+ co‐doping could produce a high‐quality white light for a glass‐based w‐LEDs . In this work, we designed a proof‐of‐principle experiment to confirm the production of white‐light by Dy 3+ / Eu 3+ co‐doping in calcium borosilicate glasses.…”

Excitability of high-energy ultraviolet radiation for Dy3+ in antimony phosphate glasses

“…The host material of glass is a non-negligible factor for the active RE 3+ to obtain efficient florescence [8][9][10][11][12][13][14][15][16][17][18][19]. Among all oxide glass laser materials, phosphate glasses have been a subject of considerable interest due to their unique properties such as high transparency, low production cost, high RE 3+ ion solubility and large emission cross section [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. Up to now, many researchers have devoted themselves with great enthusiasms to the studies of RE 3+ doped phosphate glass systems, and great achievements have been reported on their spectral characteristics [36][37][38].…”