Full-color Ba3MgSi2O8:Eu2+, Mn2+ phosphors for white-light-emitting diodes

The development of silicate matrix phosphors with broad excitation band for phosphor-convered white LED

“…Tinary silicate phosphors present promising application in this aspect. A codoped single silicate host phosphor, such as Ba 3 MgSi 2 O 8 :mEu 2+ , nMn 2+ [59][60][61] , emits blue (442 nm), green (505 nm), and red (620 nm) light simultaneously excited by UV chip (λ em = 400 nm). The emission color can be adjusted by concentration changes of m, n activators in Ba 3 MgSi 2 O 8 : mEu 2+ , nMn 2+ .…”

Photoluminescence characterization of Dy3+ and Eu2+ ion in M5(PO4)3F (M=Ba, Sr, Ca) phosphors

“…Moreover, we are interested in the M 5 (PO 4 ) 3 F phosphate based system for blue and white light emitting phosphor. Where, Dy 3+ activated phosphors have normally been used as high efficiency activators [36,37] and their photoluminescence spectra range from 450 to 700 nm. Here, we concentrate to prepare phosphate based system by low cost conventional combustion synthesis, which has advantages over the other systems.…”

Luminescence properties of Tb3+–Sm3+ codoped glasses for white light emitting diodes

“…At present, W-LEDs are fabricated by combining two or three different types of phosphors that can be excited by the blue LED chip. 4 The main problems with this type of W-LEDs are that the white light emissions tend to be unstable with respect to input power, the lower color rendering index can be poor, reproducibility are relatively low, and the luminescent efficiency reduces with time. 5 In order to overcome these problems, it is essential to devise luminescent materials that can directly emit white light under the excitation from the ultraviolet LED chip.…”