Study of optical properties of TRIS (8-hydroxyquinoline) aluminum (III)

Structural and optical properties of Tris(8-hydroxyquinoline) aluminum (III) (Alq3) thermal evaporated thin films

“…It is noticed that there is anomalous dispersion at ( < 900 nm), as well as normal dispersion in the wavelength ( > 900 nm). The values of the refractive index (n) at ( = 500-900 nm) are agree with Dalasiński [1]. In the region of normal dispersion, the single oscillation model (SOM) is applied using relation [26]:…”

“…Alq 3 enjoys more and more popularity among scientists due to its interesting optical and electrical features like strong luminescence, high electric conductance, low cost and simple technology of fabrication [1]. Therefore, this material is very important in optoelectronic applications such as, photo-detectors OLEDs, flat and flexible color displays and photovoltaic cells.…”

Effect of thermal annealing on the structural and optical properties of tris‐(8‐hydroxyquinoline)aluminum(III) (Alq3) films

“…The difference observed in the energy gap (E g ) values indicates the variation in the π-π* transitions. Dalasinski et al (18) reported an energy gap value 2.8 eV for Alq 3 films prepared by thermal evaporation at 430 K. The E g value for the 150°C annealed Alq 3 film was lower than the 50°C and 300°C annealed films. The decrease in E g attributed to the enhancement in the π-π intermolecular interaction thus lowering the π-π* transition energy (13).…”

“…A luminescence quench was observed for the crystalline Alq 3 films. Usually, crystallization tends to enhance the probability of non‐radiative decay and this causes lowering of the PL intensity . Muhammad and Sulaiman reported that the crystalline Alq 3 films exhibit PL quenching at 200°C.…”

Admittance spectroscopy and SPICE simulations for small-molecule based thin organic films

“…In many instances, small-molecule organic semiconductor materials can replace the classical inorganic components and can coexist with polymer based technology. For these reasons properties of such materials are currently intensively investigated [1], [2].…”