Structural, luminescence and EPR properties of deep red emitting MgY2Al4SiO12:Cr3+ garnet phosphor

Highly efficient Mn–Mn dimer activated phosphors for high-power near-infrared LED application

“…On the one hand, the Cr 3+ -doped phosphors exhibit narrow band emission (696 nm) or broad band emission (680–1200 nm) depending on the crystal field environment of the host lattices. 10–14 On the other hand, the great absorption of Cr 3+ matches with the emission of commercial blue LED chips. But it is well known that the toxicity of Cr 3+ hindered practical bio-applications.…”

Highly efficient and thermostable far-red phosphor for promoting root growth in plants

“…25–27 To allow phosphor to become commercially viable for plant lighting, several requirements must be met, including low price, matching plant pigment absorption spectra, high quantum yield, low thermal quenching behavior, and good climate resistance. 28–30 Up to now, Cr 3+ -activated oxide phosphors are concentrated in garnets, such as Gd 3 Ga 5 O 12 , Y 3 Al 5 O 12 , and Gd 3 Sc 2 Ga 3 O 12 , 31–33 and in double perovskites such as La 2 MgZrO 6 , LiInSi 2 O 6 , and Li/NaScSi 2 O 6 . 34–36 However, there are still some issues such as emission mismatch with plant pigment spectra, low quantum yield, or rapid thermal quenching.…”

Luminescence properties of Cr3+-doped near-infrared emissive fluoroyttrates for light-emitting diodes

“…However, little attention has been paid to the Y 3+ cation, which has been proved to be suitable acceptor for incorporating Cr 3+ sites. 17 To date, to the best of our knowl-edge, the feasible preparation, structure and luminescence properties of ANYF:Cr NIR phosphors have not been reported.…”