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http://dx.doi.org/10.4313/JKEM.2006.19.11.1020

Study of Europium-activated Calcium Aluminium Silicate Phosphors  

Hwang, Jung-Ha (한국에너지기술연구원 기능재료연구센터)
Park, Ju-Seok (한국에너지기술연구원 기능재료연구센터)
Jang, Bo-Yun (한국에너지기술연구원 기능재료연구센터)
Nahm, Sahn (고려대학교 신소재공학과 전자재료연구실)
Kim, Joon-Soo (한국에너지기술연구원 기능재료연구센터)
Yu, Soon-Jae ((주)이츠웰(Itswell))
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.19, no.11, 2006 , pp. 1020-1024 More about this Journal
Abstract
Europium$(Eu^{2+}\;or\;Eu^{3+})$-activated calcium aluminium silicate phosphors were synthesized for the first time and the structures and luminescence characteristics of these phosphors were investigated. The phosphors in this study emitted blue, green, and even red light depending on the starting milterials and annealing conditions for synthesis. In addition, the structure was also changed when the different starting materials were used. When $CaCO_3$ was used as a starting material, tetragonal $Ca_2Al_2SiO_7$ was formed. However, pure green light was emitted when the annealing was conducted in reduced atmosphere and red one was emitted by annealing in air. In the case of $CaSiO_3$ as a starting material, triclinic $CaAl_2Si_2O_8$ was formed and only pure blue emission was observed. Moreover, this blue phosphor exhibited higher intensity than that of commercial YAG:Ce phosphor, which showed the possibility of application on the phosphor for new light source such as a UV-LED.
Keywords
Europium-activated phosphor; Calcium aluminium silicate; Structure; Luminescence; UV-LED;
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Times Cited By KSCI : 1  (Citation Analysis)
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