An Electroluminescent Device Using Sintered Manganese-Doped Zinc Sulfide Phosphor Ceramics

Abstract

Recently, we have proposed new electroluminescent (EL) devices using a sintered manganese-doped zinc sulfide phosphor ceramic which acts not only as the active layer but also as the substrate [1]. The initial research clarified that the phosphor ceramic electroluminescent (PCEL) devices had advantages in regard to low cost, low dc voltage driving, breakdown-free operation and high legibility [1,2]. However, it has not been satisfactorily considered to optimize preparation conditions of the PCEL devices. In this paper, we will report the EL characteristics of the PCEL devices using ceramics fabricated by a newly developed method and will also describe some of the aging characteristics of the devices driven under various modes of excitation voltages.