High-Performance Tunable Near-Infrared Emitters of Cr-Activated Garnet Phosphor Enabled by Chemical Unit Co-Substitution.

The escalating demand for portable near-infrared (NIR) light sources has posed a formidable challenge to the development of NIR phosphors characterized by high efficiency and exceptional thermal stability. Taking inspiration from the chemical unit co-substitution strategy, high-performance tunable (Lu Ca)(Ga Ge)O:6%Cr (x = 0-3) phosphors are designed with an emission center from 704 to 780 nm and a broadest full width at half maximum (FWHM) of up to 172 nm by introducing Ca and Ge ions into the garnet structure. In particular, LuGaO:6%Cr demonstrates an anti-thermal quenching phenomenon (I = 113.

Broadband-excited and green-red tunable emission in Eu-sensitized CaMnTb(PO) phosphors induced by structural-confined cascade energy transfer.

Novel green-red color-tunable Ca(Mg,Mn)Tb(PO):Eu phosphors have been synthesized the traditional solid-state method. Since Tb/Mn ions are the parent ions in the lattice, the structural confinement occurs when the sensitizer Eu is introduced into the Ca(Mg,Mn)Tb(PO):Eu structure. The distance from Eu to Tb/Mn is confined in the 5 Å range, which induces a highly efficient energy transfer process.

Synthesis of Hollow Calcium Carbonate Microspheres by a Template Method for DOX Loading and Release with Carbon Dots Photosensitivity.

Calcium carbonate, as the main inorganic component of human bones and teeth, has good biocompatibility and bioactivity and finds increasing applications in the field of bone drug carriers. In this study, hollow calcium carbonate microspheres were synthesized by a water hydrothermal method using folic acid as a template. Before drug loading, the prepared calcium carbonate microspheres were subjected to aminidation, carboxylation, and vinylenimine modification.

Tunable photoluminescence and energy transfer of SrLiMg(PO): Ce/Tb/Mn phosphors.

The Ce/Tb/Mn activated color-tunable phosphors SrLiMg(PO) (SLMP) were prepared by solid-state reaction with post-annealing treatment. The structural, static and time-resolved luminescent properties are studied in detail. XRD pattern showed the pure trigonal phase of SrLiMg(PO) at an annealing temperature of 1300 °C.

Luminescence and energy transfer of the color-tunable phosphor Li₆Gd(BO₃)₃:Tb³⁺/Bi³⁺, Eu³⁺.

Bi(3+)/Tb(3+), Eu(3+) co-doped Li6Gd(BO3)3 (LGBO) phosphors were synthesized via a traditional solid-state method. Phase purity was investigated using X-ray diffraction, absorption strength of the phosphors were investigated by UV-vis absorption spectra, and the photoluminescence properties of the phosphors were studied systematically. Results showed that the emission intensity of Bi(3+), Eu(3+) co-doped LBOG was 2.

Luminescence and energy transfer of color-tunable Li6Gd(BO3)3:Ce(3+), Tb(3+) phosphor.

A series of novel color-tunable phosphors of Ce(3+), Tb(3+)-codoped Li6Gd(BO3)3 was synthesized through a classic solid-state reaction. The color of these phosphors changes from blue to green by adjusting the ratio of Ce(3+) to Tb(3+). The photoluminescence properties of the synthesized phosphors were investigated, and several major emission bands that belong to Ce(3+) and Tb(3+) ions were irradiated with near ultraviolet light.