The phase transformations and luminescent properties of Eu-doped Ca1-xSrxAl2O4 phosphors were investigated. Ca1-xSrxAl2O4:Eu2+ phosphors were synthesized by a solid-state reaction with a flux, H3BO3. A phase transformation from monoclinic CaAl2O4 to monoclinic SrAl2O4 was observed as the x values increased. A high-temperature hexagonal phase of SrAl2O4 was formed during this transformation as an intermediate phase under an H2 atmosphere due to oxygen vacancies; this did not occur in an air atmosphere. Accordingly, the emission spectra shifted from a blue region to a green region as x increased.

• 박윤진 | Park, Yun-Jin
• 송현돈 | 송현돈
• 정상현 | 정상현
• 이지희 | 이지희
• 황민하 | 황민하
• 김영진 | 김영진