Organic thin film materials producing novel blue laser

High-quality Al tris-quinolate (Alq3) mixtures 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.