Dy3+/Pr3+co-doped fluoro-borosilicate glasses: Energy transfer induced color-tunable luminescence

Herein, we present energy transfer dependent photoemission properties of Dy3+ and Pr3+ ions co-doped in fluoro-borosilicate glasses. Dy3+ glasses exhibited emission at 483 nm and 577 nm under lambda exci = 387 nm; Pr3+ glasses displayed emission at 488 nm and 605 nm under lambda exci = 488 nm. The energy transfer (ET) process between Dy3+ and Pr3+ ions is investigated from the spectral overlap of absorption and emission of both ions and found that ET can occur from Pr3+ to Dy3+ (3P1,0(Pr3+)+6H15/2(Dy3+)-> 3H4(Pr3+)+4F9/2(Dy3+)) and from Dy3+ to Pr3+ (4F9/2(Dy3+)+ 3H4(Pr3+)-> 6H15/2(Dy3+)+3P1,0(Pr3+)). Further, by co-doping, the optimal content of Dy3+ (1.0 mol %) with different contents of Pr3+, PL spectra, the donor (Dy3+) dependent lifetimes, and ET parameters (eta and P) are investigated and understood that the dipole-dipole interaction governs nonradiative ET from Dy3+ to Pr3+. These results demonstrate that the investigated glass systems can be potential candidates for employing in multicolor emitting devices under UV light.

Automated summary

In this study, energy transfer dependent photoemission properties of Dy3+ and Pr3+ ions co-doped in fluoro-borosilicate glasses were investigated. The results showed that energy transfer can occur from Pr3+ to Dy3+ and from Dy3+ to Pr3+, with the dipole-dipole interaction governing the nonradiative energy transfer from Dy3+ to Pr3+. The investigated glass systems have the potential to be used in multicolor emitting devices under UV light.