Organic electroluminescent device with R-G-B emission

Abstract

Many research workers have concentrated their attention to realize high performance organic EL devices. Particularly, multicolor electroluminescent (EL) devices which emit red (R), green (G) and blue (B) lights are attractive for flat panel full color display application. This paper shows several types of multicolor EL devices which show the multicolor emission by changing the applied electric field or by applying the opposite polarity of the applied field. The multicolor emission EL devices which show three different colors (R-G-B) are composed by stacking a two-color-emission part on a single-color-emission part. The emission color can be modulated by applying different polarity of applied field to the two-color part, and by applying various voltages to the single-color part, independently.