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Indexed by:Journal Papers

Date of Publication:2015-09-16

Journal:TETRAHEDRON

Included Journals:SCIE、Scopus

Volume:71

Issue:37

Page Number:6534-6540

ISSN No.:0040-4020

Key Words:Thieno[3,2-alpha]carbazole; Donor-pi-acceptor; Dye-sensitized solar cell; Molecular planarity; Charge transfer

Abstract:A new series of donor-pi-acceptor organic dyes based on thieno[3,2-alpha]carbazole as a new donor moiety, designated as JH-dyes, has been synthesized for dye-sensitized solar cells (DSCs). The photophysical properties and DSC performances of JH-dyes have been characterized. Among the three JH-dyes, a high power conversion efficiency (eta) of 8.04% with a short-circuit current (J(sc)) of 14.08 mA cm(-2) and an open-circuit voltage (V-oc) of 0.78 V has been achieved for DSC based on JH03 bearing hexyl chains on the terthiophene it-linker. The electrochemical impedance spectra (EIS) and intensity-modulated photo-voltage spectroscopy (IMVS) of JH-cells were measured to understand the effect of molecular structure on charge transfer process and electron life time. (C) 2015 Elsevier Ltd. All rights reserved.