Multiple-Photoluminescence of Ba3MgSi2O8:Eu2+, xMn(2+) Nanopowders Prepared by a Sol-Gel-Combustion Hybrid Process

作者：Ahn Wonsik; Park Jieun; Kim Young Jin^*

来源：Science of Advanced Materials, 2016, 8(10): 2022-2027.

DOI：10.1166/sam.2016.2815

• Ba3MgSi2O8
• Europium
• Manganese
• Luminescence
• Sol-Gel-Combustion

Precursors for the Ba3MgSi2O8:Eu2+, xMn(2+) (BMSO:Eu2+, xMn(2+)) nanopowders were prepared using a hybrid sol-gel combustion process, which is shown to be much faster than a conventional sol-gel process. Rietveld refinement confirmed that the fabricated BMSO had a trigonal structure with a space group of P (3) over bar (No. 147), and that the Eu2+ and Mn2+ ions were substituted on the Ba2+ and Mg2+ sites, respectively. The photoluminescence (PL) spectra of the doped BMSO powders consisted of both blue and red bands. The asymmetric blue band was attributed to two overlapping emission bands assigned to Eu(II) and Eu(III), while the red band originated from the Mn2+ ions through an energy transfer (ET) process between Eu2+ and Mn2+. The evolution of the PL spectra, decay times, and ET efficiencies are discussed. The ET process was attributed to a dipole-quadrupole interaction with a critical distance e of around 11.35 angstrom. The CIE chromaticity coordinates ranged from the blue to the magenta region when varying the Mn concentration, indicating that the synthesized powders have a high potential for application as tunable phosphors for use in white light-emitting diodes pumped by near-ultraviolet sources.

• 出版日期2016-10