Title :
Optical properties investigations of organic Alq3 layers doped by DCM
Author :
Jakabovic, J. ; Wong, T.C. ; Lengyel, O. ; Kovac, J. ; Lee, C.S. ; Lee, S.T.
Abstract :
We present the study of optical emission properties carried out on Alq3 organic solutions and evaporated films prepared by doping with dye molecules of DCM. The maxima of spontaneous emission spectral characteristics of Alq3: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.
Keywords :
electroluminescence; organic semiconductors; photoluminescence; semiconductor thin films; superradiance; vacuum deposited coatings; visible spectra; 608 to 660 nm; 621.4 nm; 628 nm; DCM doped layers; dye molecules doping; electroluminescence shifts; evaporated films; evenly spaced resonant cavity modes; laser spectrum; maximum emission intensity; optical emission properties; optical properties; optically excited amplified spontaneous emission; organic Alq3 layers; photoluminescence shifts; spontaneous emission spectral characteristics; waveguide structures; Doping; Electroluminescence; Laser excitation; Laser modes; Optical films; Optical pumping; Optical waveguides; Spontaneous emission; Stimulated emission; Wavelength measurement;
Conference_Titel :
Advanced Semiconductor Devices and Microsystems, 2002. The Fourth International Conference on
Print_ISBN :
0-7803-7276-X
DOI :
10.1109/ASDAM.2002.1088468
