Photoluminescence characteristics of green and blue emitting Alq3 organic molecules in crystals and thin films

Refined Structure Determination of Blue-Emitting Tris(8-hydroxyquinoline) Aluminum(III) (Alq3) by the Combined Use of Cross-Polarization/Magic-Angle Spinning 13C Solid-State NMR and First-Principles Calculation

“…The quantum yield of the blue-emitting Alq 3 is very high, almost double that of conventional Alq 3 . Investigations into the origin of the change in emission wavelength have been carried out, but the origin is still controversial. − Two isomeric forms of Alq 3 are known, one is called “facial” and the other is called “meridional”, as shown in Figure . The three ligands in the facial isomer are equivalent, while one of three ligands is converted in the meridional isomer.…”

Characterization of facial and meridional Alq3 thin films fabricated from physical vapor transport at high substrate temperatures

“…The pure d-phase or gphase is difficult to prepare [5]. In contrast, as the Alq 3 source powders is heated up to 390 and 420 C, the high temperature gphase is prevailing [7,11,13]. In the present work with T sub ¼ 330 C, the refined lattice parameters for the dominant triclinic d-phase are Fig.…”

“…Using a horizontal train sublimation method, dAlq 3 and a-Alq 3 polycrystalline phases were observed in the hotter (370 C) and colder (330 C) zones along the glass tube, respectively [9]. During an annealing process, a-Alq 3 polycrystalline powder was found to transform into d-phase at 380 C [15] and into g-phase at around 400 C under atmospheric pressure [11,13]. However, the amorphous films prepared by taking d-Alq 3 as the source powder to re-evaporate onto the substrates at room temperature did not show blue fluorescence but typical green emission of mer-Alq 3 [9,10].…”

Oxinate-Aluminum(III) Nanostructure Assemblies Formed via In-situ and Ex-situ Oxination of Gold-Self-Assembled Monolayers Characterized by Electrochemical, Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy, and X-ray Photoelectron Spectroscopy Methods

“…The observed electrochemical signal backgrounds at the surface of the in-situ prepared oxinate-Al(III) nanostructures as well as its superimposing faradaic features can be criticized for optoelectronic [18][19][20][21][22] and electronic [27,28] applications. Thus, we examined several routes to find appropriate method for construction of oxinate-Al(III) nanostructure on gold with minimum backgrounds, including optimizing the solvent effect (versus H 2 O), assembling of 5A8HQ:Al(III) by ex-situ method (versus in-situ), and linking spacers between the oxine and the gold surface.…”

“…Accordingly, the inter-and intra-molecular H-bond allow different Recently, the AlQ 3 complex has been fabricated on different solid surfaces like mesoporous silica [24,25], polymers [26], and alumina (Al 2 O 3 ) [22] to increase their processability. The materials and thin films modified with AlQ 3 moieties accompanied by Au or Au nanoparticles are especially important for applications in electronic [27,28] and optoelectronic devices [18][19][20][21][22]. In addition, synthesis of the complexes of amino-substituted 8HQ with Al(III) as promising charge transport buffer layer between a photoactive layer and the gold anode in the organic solar cells have been reported by Manninen et al [23].…”