Near-UV Excitable White Sr2Al2GeO7:Ce3+,Tb3+ Phosphor for Light Emitting Diodes

作者：Jiang, Ziqiang^*; Wang, Yuhua

来源：Electrochemical and Solid-State Letters, 2010, 13(5): J68-J70.

DOI：10.1149/1.3329651

• aluminium compounds
• cerium
• crystal structure
• crystallisation
• doping
• lattice constants
• light emitting diodes
• phosphors
• photoluminescence
• space groups
• strontium compounds
• terbium

A germanate gehlenite phosphor Sr2Al2GeO7:Ce3+,Tb3+ was synthesized by a solid-state reaction. Sr2Al2GeO7 crystallizes as a tetragonal structure with space group P42(1)m and lattice constants of a=7.94669(7) A degrees and c=5.36112(7) A degrees. When excited under 363 nm, Sr2Al2GeO7:Ce3+,Tb3+ exhibits a blue emission of Ce3+ and a yellowish green emission of Tb3+. Combining the two emissions whose intensity is adjusted by changing the doping level of the coactivator, an optimized white light with chromaticity coordinates of (0.25, 0.29) is generated. The phosphor could be a potential white phosphor for near-UV light emitting diodes.

• 出版日期2010
• 单位兰州大学