Organic soluble, oleic acid capped TiO 2 nano‐rod was well‐mixed with the electrochromic polymer: Poly‐(4,4‐dioctylcyclopenta[2,1‐b:3,4‐b′]‐dithiophene (PDOCPDT) to form TiO 2 /PDOCPDT nanocompsoite. TiO 2 /PDOCPDT film showed high electrochemical stability and its coloration efficiency is 1.5 times of that for pure PDOCPDT. The function of TiO 2 nano‐rods can be regarded as a dispersion agent. PDOCPDT chains in TiO 2 /PDOCPDT may have a less aggregated structure and more open morphology, therefore has higher coloration efficiency. TiO 2 may also act as electron transport or temporary electron storage centers, electrons can be transferred reversibly between PDOCPDT and TiO 2 nano‐rods. TiO 2 /PDOCPDT is well‐soluble in CHCl 3 , large area thin films can be fabricated reproducibly simply by spin coating.
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Wu et al. (2008) studied this question.
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