Synthesis and characterization of ZnS:Cu,Al phosphor prepared by a chemical solution method |
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Authors: | Lai Qi Jong M Kim Jae Y Choe |
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Institution: | a School of Materials Science and Engineering, Clemson University, Olin Hall, P.O. Box 340907, Clemson, SC 29634-0907, USAb Samsung Advanced Institute of Technology, #14, Nongseo-Ri, Gihung-Ub, Yongin-city, Kyunggi-Do, 442-743, South Koreac Army Research Laboratory, AMSRL-SE-EI, 2800 Powder Mill Road, Adelphi, MD 20783, USA |
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Abstract: | A novel and simple synthesis route for the production of ZnS:Cu,Al sub-micron phosphor powder is reported. Both the host and activator cations were co-precipitated from an ethanol medium by mixing with a diluted ammonium sulfide solution. The co-precipitated ZnS:Cu,Al was in cubic zinc blende structure after an intermediate-temperature furnace annealing. Strong photoluminescent and cathodoluminescent (CL) emission were observed, which was attributed to the 3d10-3d94s1 radiative transition at those copper sites. At an accelerating voltage of 1 kV, the CL intensity of the co-precipitated ZnS:Cu,Al sample was recorded 94% of the commercial reference phosphor with the same composition made by high temperature solid-state-reaction method. The particle size of the co-precipitated phosphor powders was found to be controllable simply through adjusting the reactant concentrations. The particle size of the annealed samples was measured by dynamic light scattering, which showed a mean particle diameter between 200 and 700 nm depending on the co-precipitation conditions. |
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Keywords: | 78 55 Et 78 55 &minus m 78 60 Hk |
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