Inherent memory effect in a SrS:Ce,K blue-emitting electroluminescent thin-film device

Abstract
The luminance-applied voltage hysteresis characteristic, so-called memory effect, has been found in the SrS:Ce,K blue-emitting electroluminescent thin-film device. The hysteresis voltage width is about 38 V with 1 kHz pulse drive. The origin of the memory effect is attributable to native defects of the SrS phosphors.