Engineering phosphors for improved brightness

  • Lin, C. H.
  • Chiou, Bi-Shiou
  • Lin, J. D.

  • 1Department of Electronics Engineering and Institute of Electronics, National Chiao Tung University, Hsinchu, Taiwan

    2Electronic Research Service Organization, Industrial Technology Research Institute, Hsinchu, Taiwan

Journal of Materials Science: Materials in Electronics 13(12):p 705-711, December 2002.

Factors affecting the cathodoluminescent (CL) efficiency of phosphors include: morphology, size, stoichiometry, composition, and surface of the phosphors. In the design of phosphors for low-voltage operations, processes such as surface etching are used to enhance phosphor efficiency. In this study, zinc-activated ZnO phosphors were subjected to three processes: acid etching, ball milling, and/or ultrasonic vibration, and the effect of each process on the CL efficiency studied. It is found that the brightness of phosphors increases 40% after ultrasonic vibration followed by etching twice with 0.005 M HNO3.

Copyright ©2002 Kluwer Academic Publishers