Erbium Bisphthalocyanine Nanowires By Electrophoretic Deposition: Morphology Control And Optical Properties

摘要

Erbium bisphthalocyanine (HErPc_2) films comprised of one-dimensional (1D) organic nanowires were obtained by the electrophoretic deposition method from the mixed solutions of chloroform and trifluoroacetic acid containing the protonated HErPc_2. Effects of the deposition voltage (V_d) and the deposition time (t_d) on the morphology of the films were studied by X-ray diffraction, UV-vis absorption and scanning electron microscope. The results revealed that the growth of 1D organic nanostructure could be conveniently controlled by tuning the deposition parameters of V_d and t_d. The influences of the annealing time and the annealing temperature were also investigated and the effect of time-temperature correspondence principle was found. The film growth mechanism was discussed for both stages of the electrophoretic deposition and the annealing process. Furthermore, the as-deposited HErPc_2 films showed interesting photoresponse in the near infrared (NIR) region, indicating the possibility for NIR photodetection application.