A Study Of Polyaniline As Optoelectronic Devices Electrode

With the development of modern industry, more and more optoelectronic devices are applied to people's daily life, especially with light weight flexible optoelectronic devices, portable, low cost, environmental pollution, etc, cause more and more research workers concern about light weight flexible optoelectronic devices.However, due to low efficiency of flexible devices, unstable, and difficult to prepare electrode materials, and other factors, flexible devices is still in development stage.In this thesis, camphor sulfonic acid doped polyaniline as an electrode material for optoelectronic devices as a starting point, to study the conductivity of polyaniline, the internal conduction mechanisms, the relationship between film thickness and transmission, bending frequency and conductivity changes,determine the work function of the material, also prepared by a simple photovoltaic device.On conductivity we studied to determine the optimal concentration of solution, and doped PMMA in the solution to improve the film forming, was found, PMMA amount of good and bad on filmfilm conductivity has great influence.Through studying AC impedance spectroscopy, we found that polyaniline can be equivalent to a resistor and a capacitor connected in parallel to be conductive,and by impedance spectroscopy we have determined the optimum ratio of polyaniline and PMMA, this best ratio is consistent with measured by four probe.Polyaniline film thickness directly affects light transmission, if the film thicker, the transmittance of the worse.At the same time in the PET substrate film, bent the films for 200 times,and we found than the conductivity of polyaniline not to change, this laid a good foundation for optoelectronic devices.