Abstract
Publisher Summary This chapter focuses on the concept of thin film electroluminescence (TFEL). It discusses two points: large-area flat panel displays and large-area light sources. The second point inherited from other forms of high field electroluminescence and powder electroluminescence (EL) of all kinds generates the fiction of walls of soft cold light, radiating with hitherto unknown efficiency from everywhere. Phosphors, luminescent solid-state materials, in powder form had been the first response to requests for large area. Since the discovery of electroluminescence by Destriau (1936), powder phosphors had been explored and to some extent even used for so-called cold lamps. Either driven by DC or AC voltages, they reached limited lifetimes, which strongly depend on drive level or light output required. Large information content displays are manufactured based on pulse driven (DC) powder screens. The only application of AC powder electroluminescence is in specialty lamps.
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