Vertical Arrays of Photoluminescent Alq3 Nanotubes on Flexible Substrates by Vapor Deposition

In this work, one-dimensional (1D) nanomaterials were created from an organic semiconductor material via vapor deposition on flexible polyethylene terephthalate (PET) substrates. Tri-(8-hydrooxyquioniline) aluminum (Alq3) molecules readily assembled into nanotubes under ambient pressure. Vertically grown Alq3 nanotube arrays on PET substrates emitted green photoluminescent light after excitation at 380 nm. This extremely simple approach offers a straightforward pathway for creating and directing vertical arrays of organic semiconducting building blocks through molecular assembly, and can be used to assemble high-performance optoelectronic devices.This work was supported by a research grant from Hanyang University (HY-2013) and Technology Innovation Program (No. 10047759) funded by the Ministry of Trade, Industry & Energy of Korea