Abstract

The discovery of highly luminescent polymers and small evaporated organic molecules , such as Alq3, offered new opportunities in the field of luminescent devices , such us light emitting diodes (LED) The optical properties of organic LED can be improved by using light in confined structures as microcavities [1], which modify both the electric field distribution and its density of modes In this work we discuss how " band edge " effects in a photonic band gap can improve the efficiency of the spontaneous emission and the gain The comparison with a microcavity and a periodical photonic band gap is performed

© 2000 IEEE