Abstract
The intrinsic green-emitting Sr2Sb2O7 phosphors with an orthorhombic structure were synthesized. Meanwhile, the doping of Bi3+ ions greatly enhanced the luminescent properties of Sr2Sb2O7 material by increasing the particle size and supplying the 3P1 → 1S0 emission. The strong green-emitting Sr2Sb2O7:Bi3+ phosphors with excellent moisture resistance and structural stability can be used for some practical applications. The packaged light-emitting diode (LED) devices based on the Sr2Sb2O7:Bi3+ phosphors with and without commercial phosphors were fabricated. Practically, the white LED device exhibited a warm white emission with the color rendering index and correlated color temperature values of 85.36 and 4185 K, respectively. Besides, the Sr2Sb2O7:Bi3+ security inks with good water resistance were presented. Finally, the prepared materials have also been successfully applied to latent fingerprint detections and flexible films. Therefore, these strong green-emitting materials are suitable for various optical applications.
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