Abstract
A low-cost ZnAl2O4:Mn2+ green nanophosphor for field emission display (FED) was successfully synthesized by the coprecipitation method and a two-step firing, firstly calcining at 1200 °C for 2 h in air and then annealing at 900 °C for 3 h in flowing NH 3 gas. The effects of the preparation process and the Mn2+ concentration on optical properties of ZnAl2O4:Mn 2+ were investigated. The phase composition, particle morphology, photoluminescence (PL) spectra of the ZnAl2O4:Mn 2+ phosphor as well as low-voltage field emission properties of the FED device prepared by using the synthesized ZnAl2O 4:Mn2+ phosphor were examined. Similar to ZnGa 2O4:Mn2+, Mn2+-doped ZnAl 2O4 showed two green emission bands centered at 508 and 517 nm, respectively, which originate from 4T1( 4G)→6A1(6S) transitions of Mn2+ on Td and Oh sites. The PL intensity reached the maximum at 0.5 at.% Mn2+. Under the low-voltage excitation, the FED device exhibited bright green emission, high voltage brightness saturation, and high color purity.
Original language | English |
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Pages (from-to) | 6317-6320 |
Number of pages | 4 |
Journal | Journal of Alloys and Compounds |
Volume | 509 |
Issue number | 21 |
DOIs | |
State | Published - May 26 2011 |
Scopus Subject Areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry
Keywords
- Cathodoluminescence
- Coprecipitation method
- FED
- Phosphors
- ZnAlO:Mn