Cairo University

MTPR Journal

 

Aluminum tris-quinolate complex thin film producing novel blue laser

& doi:
Ragab R. Amin, Lotfia El-Nadi

High-quality Aluminum-tris-quinolate complex (Alq3) with oxasene Nile Blue (NB) layers were grown on glass substrates by thermal evaporation under vacuum. The photo-luminescence spectra show three distinctive peaks and their relative intensities change with mixture relative concentrations. The major emission peak at 4100 ± 20 Å has been identified. The I- V characteristics show a Schottky diode behavior for thin film double layers of NB-(Alq3-NB) mixture. Planer Blue Laser emission took place parallel to the substrate surface and perpendicular to the electric field direction starting at V = 0.28 ± 0.05 V. Threshold current of 0.088±0.012 mA and optical power densities up to 0.5 mW/cm2 were determined.