Characterization of aluminum hydroxide phthalocyanine with multi-wall carbon nanotubes functionalized thin films for application in organic electronic devices

CURCIO, SERGIO FERNANDO

Congreso; XVIII Brasil MRS Metting; 2019

The electronic properties of phthalocyanines make them materials to be used in organic electronic devices. These molecules exhibit radiation absorption in the visible spectrum compatible with the solar spectrum and are characterized as organic load-bearing semiconductors. Here, spin-coated thin films of organic molecules of the phthalocyanine family blended with charge acceptor based on carbon nanomaterials were used as photoactive layer in organic solar cell. The donor-acceptor charge system has the ability to dissociate and transport photo-excited electrical charges during the radiation absorption process to an external circuit. In this work, the mixture composed of aluminum hydroxide phthalocyanine (AlOHPc) and carboxylic acid functionalized multiple carbon nanotubes (MWCNT-COOH) make up the photoactive layer of the photovoltaic device. The optoelectronic, morphological and structural properties of the studied materials were characterized by absorption spectroscopy, stationary fluorescence, excited state life time, cyclic voltammetry, atomic force microscopy, X-ray diffraction and Raman spectroscopy. The electrical characterization in DC regime was done through current versus voltage (J(V)) curves in ITO/AlOHPc/Al sandwich devices. The energy conversion efficiency was determined by comparing the J(V) curves in the dark and under standard illumination (AM 1.5G, 100 mW/cm2, 300K).