1. Luminescence enhancement of SrZn2(PO4)2:Eu2+,Mn2+ phosphor co-doped with Al3+
- Author
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Wei-Jun Wang, Su-Hua Yang, Tu-Chieh Hung, Che-Min Lin, and Wei-Min Tung
- Subjects
010302 applied physics ,Ligand field theory ,Materials science ,Photoluminescence ,Mechanical Engineering ,Doping ,Metals and Alloys ,Analytical chemistry ,Phosphor ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Redox ,Bond length ,Crystallinity ,Mechanics of Materials ,0103 physical sciences ,Materials Chemistry ,0210 nano-technology ,Luminescence - Abstract
This study demonstrates the emission enhancement of Al 3+ co-doped SrZn 2 (PO 4 ) 2 :Eu 2+ ,Mn 2+ phosphors. The crystallinity and emission mechanism were investigated, and the results indicate that co-doping with Al 3+ increased the atomic concentrations of Sr and P and induced the formation of Al–O bonds. The formation of P–O–P bonds was also facilitated. Furthermore, the crystal field strength of Mn 2+ –O 2- was decreased, and the reduction reaction of Eu 3+ to Eu 2+ was promoted. Photoluminescence measurements revealed a 2.83-fold enhancement of the Eu 2+ emission upon co-doping with 0.46 mol of Al 3+ . However, the Mn 2+ emission decreased and was blue-shifted because of the increased bond length of Mn 2+ –O 2- and decreased ligand field around Mn 2+ . The phosphor decay time was also reduced with increasing Al 3+ concentration.
- Published
- 2017