Fac‐Alq₃ and Mer‐Alq₃ Nano/Microcrystals with Different Emission and Charge‐Transporting Properties

Abstract

A facile double‐film annealing approach has been developed to prepare fac‐Alq3 nano/microstructures (see figure) as well as a uniform thin film. More noteworthy is that this approach not only enables the synthesis of high‐quality fac‐Alq3 nanostructures and thin films but also provides the possibility to evaluate the transporting nature of the fac‐Alq3 film. Current–voltage characterization of the fac‐Alq3 film implies that fac‐Alq3 is a typical p‐type semiconductor.

A green emissive amorphous fac-Alq3 solid generated by grinding crystalline blue fac-Alq3 powder

“…11 By patterning the fac-Alq 3 nanostructure film with an initially fabricated metal stamp with characters of ''A'' ''L'' ''Q'', a clear view of the greenemission characters, in contrast to the initial blue emissive fac-Alq 3 nanorod based film, could be seen from Fig. 3a.…”

Proposal of Organic Single Crystal Growth Method Using Electrospray Deposition and Thin‐Film Ionic Liquid

“…In recent years, it has been reported that meridional isomers and facial isomers of Alq 3 have five crystalline phases, which are denoted α, β, γ, δ, and ϵ . Figures (a)–(d) show stereoscopic and plane images of hexagonal and diamond plate‐like Alq 3 crystals obtained in our experiment.…”

Organic Single‐Crystalline Semiconductors for Light‐Emitting Applications: Recent Advances and Developments

“…This melt‐recrystallization method was further elaborated by Bi et al. in such a way that growth of Alq 3 nano/microcrystals was carried out aided by using a piece of double‐filmed equipment where two Alq 3 films were stacked together and horizontally placed into a small chamber under a nitrogen atmosphere . This equipment could sufficiently suppress the evaporation of Alq 3 molecules at high temperature.…”

“…The inset is a clear view of one single microcrystal of each. a) Reproduced with permission . Copyright 2010, Wiley‐VCH.…”