Jump to main content
Jump to site search

Issue 40, 2014
Previous Article Next Article

Double D–π–A branched organic dye isomers for dye-sensitized solar cells

Author affiliations

Abstract

Three double D–π–A branched organic dye isomers (D1, D2, and D3) with octyloxy bridge linked at different positions of the π-bridge in the D–π–A branch have been designed and synthesized for dye-sensitized solar cells (DSSCs). Their photophysical, electrochemical, and photovoltaic properties were further investigated. Compared with the reference dye isomers containing single D–π–A branches, the double D–π–A branched dye isomers consisting of two separated light-harvesting moieties in one molecule are beneficial to photocurrent generation. Moreover, the cross structure of the double D–π–A branched organic dye isomers is superior to the rod structure of the dye isomers with single D–π–A branches in the suppression of intermolecular interactions, which results in reduced charge recombination rates in the DSSCs based on double branched organic dye isomers. Therefore, in comparison to the DSSCs based on isomeric dyes with single D–π–A branches, the DSSCs based on double branched organic dye isomers display both improved short-circuit current and open-circuit voltage. Furthermore, similar to the single D–π–A branched organic dye isomers, those isomeric dyes with double D–π–A branches exhibit slightly different photophysical properties, which result in the varied photovoltaic performance. The highest power conversion efficiency of 8.1% and 6.9%, respectively, is achieved for isomer D1 based DSSC with liquid and quasi-solid-state electrolyte under simulated AM1.5G solar irradiation (100 mW cm−2).

Graphical abstract: Double D–π–A branched organic dye isomers for dye-sensitized solar cells

Back to tab navigation

Supplementary files

Publication details

The article was received on 07 Jul 2014, accepted on 17 Aug 2014 and first published on 18 Aug 2014


Article type: Paper
DOI: 10.1039/C4TA03451A
Author version
available:
Download author version (PDF)
J. Mater. Chem. A, 2014,2, 17153-17164

  •   Request permissions

    Double D–π–A branched organic dye isomers for dye-sensitized solar cells

    S. Jiang, S. Fan, X. Lu, G. Zhou and Z. Wang, J. Mater. Chem. A, 2014, 2, 17153
    DOI: 10.1039/C4TA03451A

Search articles by author

Spotlight

Advertisements