White light emission and energy transfer in Dy3+/Eu3+ co-doped aluminoborate glass

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

“…The donor (Dy 3+ ) lifetime values are also compared to other Eu 3+ /Dy 3+ co-doped reported value 0.162 ms[7] and it is higher than this.…”

“…Therefore, it can be seen that Dy 3+ emission intensity has been reduced with the Eu 3+ incorporation which could be due to partial energy transfer from Dy 3+ to Eu 3+ ions [37,7]. The proposed path for the energy transfer to occur in co-doped glasses could be 4 F 9/2 of Dy 3+ to 5 D 2 state of Eu 3+ ions.…”

“…The presence of AlF 3 in sodium phosphate glasses, convert P-O-Na and some P-O-P linkages to P-OAl linkages. This result in improved thermal, chemical durability with modification of the thermophysical properties and intermediate enhances rare earth luminescence and life time [7]. The presence of ZnO as modifier imparts additional mechanical strength, chemical durability, besides lowering thermal expansion coefficient and hygroscopic nature and also found to be attractive due to its good optical, electrical and magnetic properties [8].…”

“…The Y/B values for 1.0 to 2.0 mol% are lower than the value for 0.1 mol% because the environment of Dy 3+ ion, in ZANP glass matrix, changes with the variation of Dy 3+ content[7]. The color coordinates are calculated for optimum concentration (0.5 mol%) of Dy 3+ doped ZANP glasses using excitation wavelengths of 350, 365 and 388 nm.…”

Eu and Dy Co-activated SrB2Si2O8 Blue Emitting Phosphor: Synthesis and Luminescence Characteristics

“…Figure 5 presented the excitation spectra of SBSE and SBSED samples sintered in air and carbon monoxide atmosphere, left figure showed λ em = 435 nm and right figure showed λ em = 613 nm. The broad excitation bands with acromion located around 296, 341, 359 and 370 nm from λ em = 435 nm figure corresponded to Cai et al (2012) in alumino borate glass. However neither the 6 H 15/2 to 6 P 7/2 transition nor the CTB of Dy 3+ ions were reportedly involved in energy transfer process.…”