Theoretical and Material Studies of Thin-Film Electroluminescent Devices

• Author(s): National Aeronautics and Space Administration (NASA),
• Publisher: CreateSpace Independent Publishing Platform
• Pages: 72
• ISBN_10: 1722834323
  ISBN_13: 9781722834326
  
• Language: en
• Categories: Reference / Research ,

Description:... Thin-film electroluminescent (TFEL) devices are studied for a possible means of achieving a high resolution, light weight, compact video display panel for computer terminals or television screens. The performance of TFEL devices depends upon the probability of an electron impact exciting a luminescent center which in turn depends upon the density of centers present in the semiconductor layer, the possibility of an electron achieving the impact excitation threshold energy, and the collision cross section itself. Efficiency of such a device is presently very poor. It can best be improved by increasing the number of hot electrons capable of impact exciting a center. Hot electron distributions and a method for increasing the efficiency and brightness of TFEL devices (with the additional advantage of low voltage direct current operation) are investigated. Summers, C. J. Unspecified Center...