Abstract

Measurements of luminescence in conjugated polymers give insight into their photophysics and the operation of electroluminescent devices. The same excited state, the singlet exciton is believed to be responsible for both photoluminescence and electroluminescence. Excitons decay by a combination of radiative and non-radiative processes, and the relative rate of these processes determines the luminescence efficiency. An important feature of conjugated polymers is the possibility of chemical tailoring to realise desired properties. A recent innovation has been the development of high electron affinity polymers made by cyano substitution of members of the poly (arylene vinylene) family [1]. The increased electron affinity improves the performance of light-emitting-diodes by facilitating electron injection.

© 1995 Optical Society of America