Surfactant-assisted synthesis and luminescent properties study of LiGd(MoO4)2 phosphors

Mn-Activated Fluoride Phosphors Modified by Surfactant with Outstanding Water Resistance and Luminescent Thermal Properties

“…It is well known that the luminescence characteristics of phosphors result from various factors, among which the size, morphology, phase structure, and defect-free surface are the crucial parameters that affect luminescence, which largely depends on the route of material synthesis. − Among the many methods for synthesizing phosphors, cation exchange is the most straightforward and economical route, which allows the synthesis of uniformly sized particles with controlled morphology in a relatively short time at room temperature. Surfactants can provide a more favorable environment for matrix growth, selectively adhering to a specific crystal surface to retard the growth of that surface and control particle size by electrostatic repulsion. − Therefore, adding a certain amount of surfactant in the synthesis process can change the morphology and surface properties of particles and then change the luminescence properties of phosphors. − Pandey et al investigated in depth the effects of cetyltrimethylammonium bromide (CTAB) and trioctylphosphine oxide (TOPO) on the morphology and magnetic and luminescence properties of Gd 2 O 3 :Eu phosphors synthesized by the co-precipitation method, and the results showed that the crystallinity of the phosphors synthesized with the assistance of TOPO was improved and a significant enhancement of magnetic and fluorescence properties was observed . To our knowledge, there are no studies on the effect of the surfactant CTAB in combination with ethylene diamine tetraacetic acid (EDTA) on the luminescence properties of K 2 TiF 6 :Mn 4+ (KTFM) synthesized by the cation exchange method until now.…”

Tm3+/Tb3+/Eu3+ tri-doped Na2O-BaO-B2O3-P2O5 Glass Material for White LEDs

“…Its great advantages are considered to replace the traditional lighting equipment [1][2]. The combination of blue LED chips and phosphors are used to produced white light [3][4]. However, the LEDs obtained by this method have the disadvantages of short service life, uncontrollable color temperature, uneven phosphor distribution, white impure and so on.…”