Novel single-phase white-emitting phosphor Sr6Gd2Na2(PO4)6F< sub>2:Eu2+,Mn2+: band gap, luminescence, and energy transfer

作者：Guan, Anxiang; Chen, Peican; Wang, Guofang; Zhou, Liya^*; Meng, Yingbin; Yao, Chunying; Wang, Qiuping; Pan, Haiman

来源：Journal of Materials Science: Materials in Electronics , 2016, 27(11): 11713-11719.

DOI：10.1007/s10854-016-5308-5

• DIODES
• TB3+
• FLUORESCENCE
• CE3+/MN2+
• MN2+

White-emitting phosphors Sr6Gd2Na2(PO4)(6)F-2:Eu2+,Mn2+ (SGNPF:Eu2+,Mn2+) were synthesized under a weak reductive atmosphere. Phase purity was examined based on XRD patterns, and results showed that the obtained SGNPF:Eu2+,Mn2+ phosphors were well crystallized with no impurity phase. The emission spectra of SGNPF:Eu2+,Mn2+ phosphor exhibited broad blue and broad yellow emission bands with two peaks at approximately 460 and 560 nm under 300 nm excitation. The energy transfer process from Eu2+ to Mn2+ was verified through luminescence spectra and fluorescence decay curves. The energy transfer from Eu2+ to Mn2+ in SGNPF was demonstrated to be a resonant type via a dipole-dipole mechanism. Adjusting the relative contents of Eu2+ and Mn2+ could change the emitting colors of SGNPF:Eu2+,Mn2+ phosphors from blue and azure to white, and the ideal white light-emitting phosphor SGNPF:0.05Eu(2+),0.25Mn(2+) with color coordinate (0.29, 0.31) was obtained. All investigations indicated that the SGNPF:Eu2+,Mn2+ phosphors exhibit great potential as a single component white-emitting phosphor for white light-emitting diodes.

• 出版日期2016-11
• 单位广西大学