In this study, optical and electrochemical properties of regioregular and soluble
alkyl substituted propylenedioxyselenophene based electrochromic polymers, namely
poly(3,3-dibutyl-3,4-dihydro-2H-selenopheno[3,4-b][1,4]dioxephine) (PProDOS-C4),
poly(3,3-dihexyl-3,4-dihydro-2H-selenopheno[3,4-b][1,4]dioxephine) (PProDOS-C6), and
poly(3,3-didecyl-3,4-dihydro-2H-selenopheno[3,4-b][1,4]dioxephine) (PProDOS-C10),
which were synthesized via electrochemical polymerization, were investigated. It is
noted that these unique polymers have low band gaps (1.54 &ndash / 1.64 eV) and they are
exceptionally stable under ambient atmospheric conditions. For example, polymer
films retained 84-96 % of their electroactivity after five thousands cycles. The
percent transmittance of PProDOS-Cn (n= 4, 6, 10) films found to be between 55-59
%. Furthermore, these novel soluble PProDOS-Cn polymers showed electrochromic
behavior: a color change form pure blue (L = 57.31, a = -13.18, b = - 42.68) to highly
transparent state (L = 91.74, a = 2.52, b = -1.30) state in a low switching time (1.0 s)
during oxidation with high coloration efficiencies (328 &ndash / 864 cm2/C) when compared
to their close analogues.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12613106/index.pdf |
| Date | 01 March 2011 |
| Creators | Atak, Samed |
| Contributors | Onal, Ahmet Muhtar |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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