New Dithienylpyrrole-containing bipyridine ligands and corresponding Ruthenium complexes. Electronic properties and applications to photosensitization in Dye-Sensitized Solar Cells

Abstract : Dye-sensitized Solar Cells (DSSC) appear to be promising devices. Operation principle relies on the photosensitization of a wide-gap semiconductor with a dye, the latter typically being a polypyridinyl ruthenium(II) complex. Modulation of the properties of such complexes enables the optimization of the corresponding solar cells' performances. In the present work, we synthesized and investigated the effect of new bipyridine ligands bearing electron-donating dithienylpyrroles (DTP). These moieties induced red-shifts of the absorption spectra in homoleptic, bis- and tris-heteroleptic Ru(II) complexes especially when the DTP was bound by its thiophene unit to the bipyridine ligand. A notable increase of the molar extinction coefficients was also obtained. All new compounds have been characterized by using spectroscopic, electrochemical, photophysical and computational chemistry techniques. Two heteroleptic complexes have been tested in DSSCs. Despite excellent light harvesting properties, performances were found lower than those of standard dyes as revealed by J/V and IPCE curves. Stereoelectronic effects could be involved since the bulky DTP moiety could impede an efficient access of the mediator to Ru(III) centers
Document type :
Theses
Complete list of metadatas

Cited literature [149 references]  Display  Hide  Download

https://hal.univ-lorraine.fr/tel-01749247
Contributor : Thèses Ul <>
Submitted on : Thursday, March 29, 2018 - 12:10:36 PM
Last modification on : Wednesday, April 11, 2018 - 1:28:12 AM
Long-term archiving on : Friday, September 14, 2018 - 8:32:38 PM

File

DDOC_T_2012_0029_NOUREEN.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : tel-01749247, version 1

Collections

Citation

Sajida Noureen. New Dithienylpyrrole-containing bipyridine ligands and corresponding Ruthenium complexes. Electronic properties and applications to photosensitization in Dye-Sensitized Solar Cells. Other. Université de Lorraine, 2012. English. ⟨NNT : 2012LORR0029⟩. ⟨tel-01749247⟩

Share

Metrics

Record views

12

Files downloads

31