Near white light emission of BaY2ZnO5 doped with Dy3+ ions

New Single-Phase, White-Light-Emitting Phosphors Based on δ-Gd2Si2O7 for Solid-State Lighting

“…32 The CCT values, calculated using the empiric formula given by McCamy 23 were 7077 K, 7111 K, and 6721 K for the 0.5, 1.0 and 2% Dy doped samples, respectively. This temperature is some 1000 K higher than the highest CCT reported in the literature for Dy 3+ -based phosphors, 33,34,35 which makes this phosphor very useful for inside illumination of offices, classrooms, etc., where a cold lighting (higher CCT) is used to enhance concentration. In order to synthesize a single-phase phosphor, which emits white light with broad spectral dispersion, we have codoped the δ- and Eu 3+ at 273 nm, as well as to the low concentration of Tb, which allows observation of the blue emission, as explained above.…”

Spectroscopic assessment of Dy3+:LiLa(MoO4)2 crystal as an active medium for all-solid-state direct yellow-emitting lasers

“…Thus, the yellow-to-blue (Y/B) intensity ratio can be significantly different in different lattices, which to a large extent determines the device potentialities of Dy 3+ -doped materials. As an example, materials with appropriate (Y/B) ratio can be utilized for interesting white light generation [14][15][16]. In the present study, high (Y/B) ratio is desirable.…”

Crystal Growth and Luminescence Properties of Dy3+ and Ge4+ Co-Doped Bi4Si3O12 Single Crystals for High Power Warm White LED

“…Because the visible luminescence of Dy 3+ ( 4 f 9 ) excited by UV light mainly consists of three bands in blue (470-500 nm), yellow (570-590 nm), and red (655-670 nm) regions, which results in white light emission. However, the CCT values of many fluorescent materials-such as some fluoride, tungstate, borate and silicate-are close to or even higher than 4000 K [16][17][18][19][20][21][22][23][24][25][26]. Our group has investigated the growth and properties of BSO crystals for several years [10,14,15,[27][28][29][30][31].…”