Electroluminescent Phosphors ☆

Electroluminescence (EL) is a phenomenon where light is generated by an electric field. The phenomenon is applied in display devices which can be divided into two categories: (i) low field devices and (ii) high field devices. From the practical point of view the a.c. operated thin film electroluminescent (TFEL) devices are the most important ones and they are the topics of this article.