Synthesis of Blue‐Emitting CaMgSi₂O₆:Eu²⁺ Phosphor Using an Electrostatic Self‐Assembly Deposition Method

Abstract

Eu 21 -doped CaMgSi 2 O 6 phosphor was prepared by depositing mixed hydroxides of Ca, Mg, and Eu over spherical SiO 2 particles (300 nm) pre-coated with polycations (polyethyleneimine), followed by calcination at 12001C in a reducing atmosphere. The prepared phosphor showed intense blue emission, ascribable to the 4f 7 -4f 6 5d transition of Eu 21 . In contrast, the luminescence intensity of the phosphor was considerably decreased when prepared without polycations. It was suggested that negatively charged hydroxides are deposited on positively charged SiO 2 surfaces pre-coated with polycations through electrostatic selfassembly interaction. On calcination, the hydroxide shells react with the SiO 2 cores to produce Eu 21 :CaMgSi 2 O 6 .J ournal

Preparation of blue-emitting CaMgSi2O6:Eu2+ phosphors in reverse micellar system and their application to transparent emissive display devices

“…We can realize that the XRD patterns of reverse micellar grown Eu 2 þ doped CMS are in good agreement with samples prepared from other synthetic methods like as solid-state reaction, sol-gel and spray pyrolysis [15][16][17][18]. When the particles are formed out of the controlled synthetic conditions, however, a subsidiary phase denoted as n , MgSiO 3 (JCPDS no.…”

“…In addition, Eu 2þ -doped CMS can also be used as a long phosphorescent phosphor when co-doped with Dy 3þ [15]. There are various methods to produce efficient rare-earth ion doped CMS phosphors, such as the solid-state reaction method, sol-gel process, and spray pyrolysis [16][17][18]. However, the resultant particles were usually microscale and irregular in shape, making them unsuitable for transparent luminescent layers, as we mentioned before.…”

Mechanism of the reduction and energy transfer between Eu2+ and Eu3+ in Eu-doped CaAl2Si2O8 materials prepared in air

“…Due to their luminescent properties, extensive investigations have been devoted to Eu 2+ -doped luminescent materials. [1][2][3][4][5][6][7][8][9][10] In this group of phosphors, aluminates, silicates, and aluminosilicates have received much attention and some of them now have major applications in plasma display panels or white lighting (e.g. BaMgAl 10 O 17 :Eu 2+ , 6 MAl 2 O 4 :Eu 2+ (M ¼ Ca, Sr, Ba), 2,8,10 CaMgSi 2 O 6 :Eu 2+ , 7 etc.).…”

Synthesis of Diopside by Solution Combustion Process Using Glycine Fuel

“…DP has attracted the attention of materials scientists due to its technological applications in the field of phosphors, biomaterials, coatings, nuclear waste immobilization, sealing materials in solid oxide fuel cells etc. DP shows high biocompatibility, bioactivity and fracture toughness which are very useful in biomaterial field 1 and high luminescent efficiency 2 , high thermal stability, chemical stability, better sinterability, and other unusual properties. Various methods are employed to produce nano crystalline DP powders like solid state 3 , sol gel method 4 , precipitation 5 etc, which are time and energy consuming, and have limitation when applied to bulk synthesis.…”