| 초록 |
Electrochromism is reversible optical change or coloration through oxidation–reduction cycle by applying of bias voltage. Poly (3,4-ethylenedioxythiophene) (PEDOT) have been received much attention for application of electrochromic materials due to unique properties such as high transparency, high conductivity, and good thermal stability. Metal nanoparticles have been attracting extensive research interest, due to unique electrical, optical properties. For enhance the eletrochromic properties of PEDOT, Au NPs were incorporated into PEDOT. The effects of Au NPs on the electrical, optical and electrochromic properties of PEDOT have been investigated. The PEDOT and Au/PEDOT films were synthesized using 2-mercaptoethanol-capped Au NPs in MeOH, EDOT, iron p-toluenesulfonate (Fe(OTs)3) as oxidant and imidazole (IM). The formation of Au NPs, PEDOT, and Au/PEDOT was checked with Fourier transform-infra red (FT-IR) and ultra violet-visible (UV-vis.) spectroscopies. The current-voltage (HP4145B) analyses were carried out using Pt interdigited electrode (IDE) on SiO2. Atomic force microscopy (AFM) was used to monitor the surface morphology of the PEDOT and Au/PEDOT films. A chemical interaction between Au NPs and PEDOT was investigated using high-resolution photoemission spectroscopy (HR-PES) in the 8A2 beam line at Pohang Accelerator Laboratory (PAL). The electrochromic properties were measured with PEDOT and Au/PEDOT films deposited on ITO glass by using galvanostat/potentiostat in 0.1 M LiClO4/acetonitrile. |
