Modification Of The Optical Film Of The Phthalocyanine

As a kind of organic semiconductor materials, metallophthalocyanines (MPc) have been applied into so many fields such as photoconductor, gas sensors, solar cells, non-linear optics devices, electroluminescences, electrophotography devices and etc. One of the major characters of MPcs is that the band structure of the Mpcs can be easily tailored, so in order to enhance the photoconductivity and adjust the spectral response range of MPcs, many means have been carried out to change the band structure of the MPcs. In the thesis, we have studied the behavior of the composite films of PbPc&VOPc, H2Pc&C60, VOPc&C60 and changes of structures and optical characteristics of VOPc films under different thermal treatment conditions.By vacuum deposition method, we have prepared the single component films of PbPc, VOPc, H2Pc, C60 and the composite films of PbPc&VOPc, H2Pc&C60, VOPc&C60- It is found that, compared with the single component films, the composite film is not a simple combination of the component materials. In the UV-VIS absorption spectrum, the absorption peak of Q-band of PbPc&VOPc film shows an obvious red shift, while that of H2Pc&C60 and VOPc&C60 shows a blue shift. The interaction between different molecules in the composite films may be the main reason for the different shift trends in the UV-VIS absorption spectra.By studying the results of UV-VIS absorption, XRD and AFM, we found that under different thermal treatment conditions the changes of the film property are also different. When treated in electric field, the main obsorption peak of the Q-band has a blue shift and the intensity of the shoulder peak of the Q-band increased a little, while the XRD results show that in the VOPc films the molecules trend to orient along the e-field. When the VOPc samples were annealed under different temprature in magnetic field f, the main obsorption peak of the Q-band has a red shift and the diffraction peaks of the XRD spectra have obvious changes in the peak intensity. All these changes show that after thermal treatments in different external fields, the properties of the VOPc films were changed.