Optical properties investigations of organic Alq/sub 3/ layers doped by DCM

Abstract

We present the study of optical emission properties carried out on Alq/sub 3/ organic solutions and evaporated films prepared by doping with dye molecules of DCM. The maxima of spontaneous emission spectral characteristics of Alq/sub 3/:DCM films measured by photo- and electroluminescence shifts towards the higher wavelengths from 608 - 660 nm with simultaneous decrease in spectral intensities within the investigated DCM doping concentration range of 0.9 11%, respectively. The maximum emission intensity was observed at DCM doping concentration around 1% causing peak emission near 628 nm by optical pumping. Optically excited amplified spontaneous emission and laser spectrum showing evenly spaced resonant cavity modes with preferential emission peak at 621.4 nm have been measured on waveguide structures prepared onto GaAs substrate.