Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 94, Issue 7, Pages 1286-1292Publisher
ELSEVIER
DOI: 10.1016/j.solmat.2010.03.027
Keywords
Electrochemistry; Electrochemical polymerization; Conducting polymer; Electrochromism; Electrochromic device
Funding
- Korean Goverment [2009-0079376]
- National Research Foundation of Korea [2009-0079376] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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This study examined a highly efficient synthetic route and characterization of two derivatives of 2,5-di(2-thienyl)-1H-pyrrole that incorporated 3-pyridinyl and 1,10-phenanthroline moieties in the central pyrrole ring. The electrically conductive polyPTPy and polyPhenTPy films were synthesized through electropolymerization on a glassy carbon electrode in a 0.1 M TBAP/dichloromethane solution. The polymer films were characterized using cyclic voltammetry (CV), in situ conductivity measurements, and in situ spectroelectrochemistry. The redox peaks of the polyPTPy and polyPhenTPy films were observed at 0.96/0.66 and 0.89/0.73 V. respectively. The maximum conductivities of polyFTPy and polyPhenTPy were 6.5 x 10(-2) and 9.2 x 10(-2) S/cm at 1.4 V. The spectroelectrochemical analysis showed that the polyPTPy film was brownish-yellow color (lambda(max)=430 nm) in the neutral state and dark blue (1.4 V) in the fully oxidized state. Similarly, polyPhenTPy was greenish-yellow color (lambda(max)=451 nm) in the neutral state and light blue (1.4 V) in the fully oxidized state. The polymer films exhibited a fast optical switching time within 1.0 s. The electrochemical and spectroelectrochemical characterizations of these films revealed that the materials were highly electroactive and robust in terms of electrochromics. (C) 2010 Elsevier B.V. All rights reserved.
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