Luminescent Properties of BaSi₂O₅:Eu²⁺Phosphor Film Fabricated by Spin-Coating of Ba-Eu Precursor on SiO₂Glass

Abstract

Well-crystallized BaSi2O5:Eu2+ phosphor films were synthesized by heat treatment of spin-coated BaO:Eu on SiO2 glass. We investigated luminescence-structure properties of these phosphor films as a function of heat-treatment temperature. From x-ray diffraction patterns, our BaSi2O5:Eu 2+ phosphor films revealed that (111)-and (204)-crystal planes of BaSi2O5 crystal were dominantly increased with an increase of heat-treatment temperature. Photoluminescence intensities of BaSi2O5:Eu 2+ phosphor films were increased with amount of these crystal planes. It can be explained that Eu 2+ ions were stably occupied at specific crystal orientation of BaSi2O5 crystal, enhancing the luminescent intensities of BaSi2O5:Eu 2+ phosphor films.In addition, our BaSi2O5:Eu 2+ phosphor films had transmittance of 70% at 510 nm,.due to the dense morphology and specific crystallinity of BaSi2O5:Eu 2+ phosphor films.

Identifying and explaining vibrational modes of sanbornite (low-BaSi2O5) and Ba5Si8O21: A joint experimental and theoretical study

“…Barium silicates are extensively studied for their excellent material properties and device performance in a range of important technological applications [1][2][3][4][5][6][7] Sanbornite (low-BaSi2O5) is a uncommon mineral found in Big Creek, California (USA), and its hydrous analogue bigcreekite (BaSi2O5•4H2O) are rare examples where Ba is concentrated in a silicate phase [8][9][10]. On the other hand, Ba5Si8O21 is a synthetic phase, displaying the rare characteristic of being an anhydrous phase containing ribbons (quadruple zweier chains) of silica tetrahedra surrounded by Ba cations which stabilize the stretched chains.…”

Synthesis and Exploitation in Solar Cells of Hydrothermally Grown ZnO Nanorods Covered by ZnS Quantum Dots

“…Finally the ZnO film was annealed at 450℃ for 2 h in a furnace. Since all steps of coating (adsorption, reaction, and rinsing) take place simultaneously during spin coating, this method does not require any rinsing step for elimination of residual organic materials [48]. The mean thickness of the ZnO film was about 70 nm.…”

Distribution of luminescent centers in Ce3+-ion doped amorphous stoichiometric glass BaO–2SiO2 and dedicated glass ceramics

“…Disordering is replaced by ordering in a crystallized part of the material, so crystalline field, distribution of the local charge compensation in the vicinity of activator as well, are changed. For instance, recent study of europium doped barium disilicate glass system showed that luminescent properties of the material are strongly affected by crystallization [4,5]. Eu 2+ -ions luminescence, which was not detected in a mother glass, became dominating when glass material was crystallized by thermal treatment.…”