Synthesis and Luminescent Characteristics of $BaGa_{2}S_{4}:Eu^{2+}$ Phosphor by Solid-state Method

• Published in: Journal of Information Display Vol. 7; no. 4; pp. 13 - 16
• Main Authors: Kim, Jae-Myung, Park, Joung-Kyu, Kim, Kyung-Nam, Lee, Seung-Jae, Kim, Chang-Hae
• Format: Journal Article
• Language: Korean
• Published: 2006
• Subjects: LED; BaGa_{2}S_{4}:Eu^{2+}; Phosphor
• ISSN: 1598-0316; 2158-1606

II-$III_{2}-(S,Se)_{4}$ structured of phosphor have been used at various fields because they have high luminescent efficiency and broad emission band. Among these phosphors, europium doped $BaGa_{2}S_{4}$ was prepared by solid-state method. We investigated the possibility of applying [ ] due to emissive property of UV region. Also, general sulfide phosphors were synthesized by using injurious $H_{2}S$ $CS_{2}$ gas. However, this study prepared $BaGa_{2}S_{4}:Eu^{2+}$ phosphor is addition to excess sulfur under 5% $H_{2}$/95% $N_{2}$ reduction atmosphere. So, this process could involved large scale synthesis because of non-harmfulness and simple process. The photo-luminescence efficiency of the prepared $BaGa_{2}S_{4}:Eu^{2+}$ phosphor increased by 20% compared with commercial $BaGa_{2}S_{4}:Eu^{2+}$ phosphor. From this, we could conclude that the prepared $BaGa_{2}S_{4}:Eu^{2+}$ could be applied to green phosphor for white LED of three wavelengths.