19.6L: Late‐News Paper: How to Fabricate Much Brighter AC Electroluminescent Lamps: Optimizing the Alignment of the Emitting ZnS:Cu Phosphor Particles to the AC Field

Abstract

The photoluminescence and electroluminescence of loose ZnS:Cu crystals scattered on an interdigitated electrode substrate have been studied under 366nm UV light excitation and or under an applied AC field. From the response of the ZnS:Cu crystals to the AC field and their movement in the field it is shown that a greater understanding of the factors affecting ACEL panel performance can be gained. The findings light the way to the fabrication of very bright panels and a suggestion can be made to the expected luminescence of optimised ACEL lamps

Studies on the Orientation of ACEL ZnS:Cu Particles in Applied AC Fields

“…Finally it is apparent from this work that the orientation of the particles to the applied field is all important to maximize the light emission. 29 From our observations on normal panels up to one third of all particles are aligned completely against the field (wrong orientation) and a further third are only partially aligned and only a further third are only partially aligned with the field, hence we would expect almost twice the light output at any applied voltage if all particles were aligned. Of course suggesting how such alignment could be achieved is not straight forward.…”