[12p-A303-1~15] 13.8 Optical properties and light-emitting devices

[12p-A303-11] Synthesis of nano (Ba,Sr)₂SiO₄:Eu²⁺ phosphor using the WASSR method

〇Kenji Toda¹, Yusuke Shibuta¹, Shota Sato¹, Suzuka Hasegawa¹ (1.Niigata Univ.)

Keywords:WASSR method, Soft chemistry, Silicate

Ba₂SiO₄:Eu²⁺ nanophosphor has been succeeded to synthesize via the WASSR method. It was determined that the best combination of starting materials was Ba(OH)₂·8H₂O and amorphous SiO₂ by measuring acid strength of various Ba and Si sources with using Hammett indicators and the chemical reaction proceeds only in the combination. In the best our knowledges, Ba₂SiO₄ phase was synthesized at lowest temperature of 220°C via Ba₂[SiO₂(OH)₂]₂ phase, which is similar to crystal structure of Ba₂SiO₄. The particle size of the sample synthesized by the WASSR method was found to be 15-20 nm by HR-TEM observation.