Abstract
The surface of (Y,Gd)BO3:Eu3+ phosphor, a red-emitting source in the plasma display panel (PDP), was coated with Al2O3 nano-particles. Colloidal alumina oxide was selected as a coating material for the surface modification of the (Y,Gd)BO3:Eu3+ phosphor. A modified sol-gel method was used for coating the surface of the phosphor by Al2O3 nano-particles. Al2O3 nano-particles in the surface of the phosphor were observed by Scanning Electron Microscope. It was found that the luminance intensity was increased in the photo-luminescence (PL) by a suppression of the nonradiative recombination via surface defeats. The experimental results suggest that the surface coating of phosphors with Al2O3 nano-particles leads to an increase in the luminance intensity of the PDP and the gas discharge lamps.
Acknowledgments
This research was financially supported by the Ministry of Commerce, Industry and Energy (MOCIE) and Korea Industrial Technology Foundation (KOTEF) through the Human Resource Training Project for Regional Innovation.