Study of photophysical properties of different metal complexes of Alq3

Different metal complexes of Alq₃ (K⁺, Sr²⁺, Ca²⁺ and Mg²⁺) were synthesized by the precipitation method. The characterization of photoluminescence showed that presence of Mg²⁺ ion enhances photoluminescence of Alq₃ phosphor. The emission spectra are observed at 560 nm when excited at a wavelength of 440 nm. The phosphor is excited at a longer wavelength in the blue region of small energy, so that it could be used as lamp phosphor. It is observed that the prepared phosphor AlMgq₅ is more suitable than Alq_3. The ionic radii of K⁺, Sr²⁺, Ca²⁺ and Mg²⁺ ions are in decreasing order. Therefore, the remarkable properties of AlMgq₅ could be considered as promising materials as opto‐ or optoelectronic materials. Copyright © 2012 John Wiley & Sons, Ltd.