We studied the effect of dopant concentration in ZnS:Cu,Al phosphor. Photoluminescent (PL) intensity of the chemically etched phosphor particles increased up to 140%, which proved the existence of a dopant concentration gradient. Calculation revealed the quantitative relationship between the dopant concentration and the luminescent intensity by relating the concentration gradient to the PL intensity. The result showed that the most efficient concentration is 100 ppm copper and the concentration quenching starts at 152 ppm.
Revised: March 5, 2004 |
Published: December 15, 2003
Citation
Qi J.L., B.I. Lee, B.I. Lee, X. Gu, M. Grujicic, W.D. Samuels, and G.J. Exarhos. 2003.Concentration Efficiency of Doping in Phosphors: Investigation of the Copper and Aluminum Doped Zinc Sulfide.Applied Physics Letters 83, no. 24:4945-4947.PNNL-SA-39971.