Title: Influence of molecular weight on silole-containing cyclopentadithiophene polymer and its impact on the electrochromic properties
Authors: Huang, Jen-Hsien
Huang, Annie Tzuyu
Hsu, Chih-Yu
Lin, Jiann-Tsuen
Chu, Chih-Wei
光電工程學系
Department of Photonics
Keywords: Electrochromic;Polymer;Molecular weight;Electrochemistry;Mobility
Issue Date: 1-Mar-2012
Abstract: In this article, we have systematically studied the effect of molecular weight on poly[(4,4'-bis(2-ethylhexyl)dithieno[3,2-b:2',3'-d]silole)-2,6-diyl-alt-(5,5'-thienyl-4,4'-dihexyl-2,2'bithiazole)-2,6-diyl], a novel cathodically coloring electrochromic polymer. The polymer with higher molecular weight can stack much better due to the stronger pi-pi* interaction and was found to exhibit better charge transfer property and lower internal resistance. These results have shown to enhance the coloration efficiency of the polymer remarkably. For the molecular weight of 33.6 kg/mol, the coloration efficiency is 423 cm(2)/C, much higher compared with the low molecular weight polymer (6.3 kg/mol, 226 cm(2)/C). (C) 2011 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.solmat.2011.11.019
http://hdl.handle.net/11536/15602
ISSN: 0927-0248
DOI: 10.1016/j.solmat.2011.11.019
Journal: SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume: 98
Issue: 
Begin Page: 300
End Page: 307
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