AVS 46th International Symposium
    Flat Panel Displays Topical Conference Monday Sessions
       Session FP-MoA

Invited Paper FP-MoA1
Critical Issues Related to Processing and Properties of Laser Deposited Luminescent Oxide Thin Films

Monday, October 25, 1999, 2:00 pm, Room 604

Session: Luminescent Thin Films
Presenter: R.K. Singh, University of Florida
Authors: R.K. Singh, University of Florida
K.G. Cho, University of Florida
D. Kumar, University of Florida
P.H. Holloway, University of Florida
Correspondent: Click to Email
The performance of the powder-based field emission display devices can be improved significantly by using thin film phosphors due to their higher lateral resolution, better thermal stability, reduced outgassing, and better adhesion to the solid surfaces. A variety of growth techniques such as evaporation, spray pyrolysis, sputtering, metal organic chemical vapor deposition, and pulsed laser deposition, are employed for the fabrication of thin film phosphors. The pulsed laser deposition (PLD) technique is emerging as one of the most convenient techniques to fabricate complex thin films since it offers numerous advantages, including convenient reproduction of target stoichiometry onto the films, low contamination level, high deposition rate, atomically sharp step coverage, thickness control. However, the biggest hindrance in the use of thin film phosphors is their low brightness and efficiencies in comparison to those of bulk powder phosphors. In this talk, we will discuss some of the critical issues related to processing and properties of laser deposited Eu-activated yttrium oxide (Eu:Y @sub 2@ O @sub 3@) luminescent thin films. We will also present our results showing how brightness and stability can be improved significantly by changing microstructure, orientation, and crystallinity of Eu:Y@sub 2@O@sub 3@ films by changing the processing parameters during pulsed laser deposition. A theoretical model will be presented to account for the increase in brightness with an increase in film roughness which has been found to be a key parameter determining the light piping effect.