Abstract

Functional organic materials have gained increasing attention in recent years due to their promise in the fabrication of full color emitting displays. Electroluminescent devices based on thin films of evaporated organic molecules,¹ conjugated polymers² have been extensively investigated because of their red- green-blue output color, light weight, mechanical flexibility and ease of fabrication. In this report, it has been observed that up to a certain temperature luminance intensity decreases with decreasing temperature and then saturates in the low temperature region. The quantum efficiency increases with decreasing temperature and finally reaches to a constant value. From the voltage dependent study we have observed that there is an optimum voltage required to get the maximum efficiency.

© 2000 Optical Society of America