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

Formation of Flower-Like Crystals of Tris(8-hydroxyquinoline)aluminum from 8-Hydroxyquinoline on Anodic Porous Alumina

“…The preparation and characterization of Alq 3 have been widely studied [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Because of the bidentate ligand, Alq 3 complexes form two isomers, as shown in Figure 1: meridional and facial.…”

Photo and electroluminescence of a solution processable silane modified Alq3 composite showing bluish green emission

“…With adding other functional groups to different positions on 8-hydroxyquinoline structure, the color and Alq3-based structure having different adsorptions and emissions could be achieved. Furthermore, according to a previous works [22] the Si-O-Si network linked to hybrid Alq3 in the hybrid system may act as optically inactive spacer molecule, reducing the packing density of Alq3 and the direct intermolecular interactions between the chromophore molecules, also causing a blue shift of the emission. Therefore, it is the silylation of the ligand and the covalent bonding between the silica matrix and the organic complex that affect the luminescent properties of Alq3-network.…”

“…Another way is grafting Alq3 in a matrix with chemical bonds, which potentially increases the concentration of Alq3 in the final structure. In other works [22,23], attaching Alq3 to hybrid structures are reported but no data for their use in OLED structures were obtained.…”

“…Each of these two methods has their own challenges. However, spin coating method due to its less need to use sophisticated equipments and working constrains such as high vacuum has found more advocates compared to PVD method [20,22]. Insolubility in common solvents is one of most important limitations of Alq3 to be deposited by spin coating [22,23].…”

Structural and optical characterizations of pyronine B thin films and its photovoltaic applications

“…Moreover, they have advantages of low cost, ease of processing, and the ability to modify their structure to obtain the desired electrical and optical characteristics when compared with conventional inorganic semiconductors [2][3][4][5][6].…”