Nazarow, Luminescence mechanism of highly efficient YAG and TAG phosphors, Moldavian. Luo et al., Highly efficient non- rare-earth red emitting phosphor for warm white light-emitting diode. Liu, Enhancing solar cell efficiency: the search for luminescent materials as spectral converters. Schmidt, Inorganic luminescent materials: 100 years of research and application. Lu, et al., AIE-active smart cyanostyrene luminogens: polymorphism-dependent multicolor mechanochromism, J. Kim, Solid-state light sources getting smart. Shea-Rohwer et al., Highly versatile rare earth tantalate pyrochlore nanophosphors. The overall work suggested that Sr 7Sb 2O 12:Eu 3+ phosphor is a promising red-emitting component applied in warm white LED. Combining with the red Sr 7Sb 2O 12:0.20Eu 3+, blue BaMgAl 10O 17:Eu 2+, yellow (Ba,Sr) 2SiO 4:Eu 2+ phosphor and a 395 nm near-UV LED chip, a white LED with low correlated color temperature (CCT = 4260 K) and high-color rendering index (Ra = 91.8) was fabricated. The decay lifetime of Sr 7Sb 2O 12:0.2Eu 3+ was about 1.44 ms. The temperature-dependent spectra of Sr 7Sb 2O 12:Eu 3+ implied that this sample shows good thermal-stable properties. The optimal Eu 3+ doping concentration was determined to be about x = 0.2 and concentration quenching mechanism in Sr 7Sb 2O 12:Eu 3+ sample was attributed to the electric dipole–dipole interaction. When co-doped with the charge compensation M + (M = Li, Na, K) ions, the emission intensity of Eu 3+ can be enhanced to some extent. Sr 7Sb 2O 12:Eu 3+ could be efficiently excited by the near-ultraviolet (UV) light and exhibited bright red emission around 612 nm. The phase structure, crystal morphology, luminescence properties, luminescence decay lifetime, thermal stability and chromaticity coordinate of the as-synthesized phosphors were investigated in detail. Novel red phosphors Sr 7Sb 2O 12:Eu 3+ and Sr 7Sb 2O 12:Eu 3+, M + (M = Li, Na, K) were synthesized via a high temperature solid-state method and their luminescent properties were investigated to figure out the promising application in warm white light-emitting diodes (LED).

Sb element