Sensitive mechanoluminescence from Eu3+ doped Gd3GaO6 phosphors

Highly efficient mechanoluminescent material Gd 3 GaO 6 : Eu 3+ was synthesized by high-temperature solid-phase method. The phosphor can effectively excited by ultraviolet light near 261 nm, along with strong red emission from the phosphor at 612 nm due to the main radiation transition of 5 D 0 - 7 F 2 of Eu 3+ . The results of photoluminescence and mechanoluminescence indicated that the luminescence intensity reaches a maximum when the concentration of Eu 3+ is 0.1. The thermoluminescence spectroscopy results indicated that the mechanoluminescence manifestation of the phosphor was caused by the release of carriers from the trap under mechanical stimulation, thereby revealing the mechanism of mechanoluminescence of Gd 3 GaO 6 : Eu 3+ . The possible applications of wearable devices based on fluorophores in the bending-induced mode are also proposed, showing a wider development prospect for the application of phosphors to wearable devices.