Back to Search
Start Over
Role of the Triiodide/Iodide Redox Couple in Dye Regeneration in p-Type Dye-Sensitized Solar Cells
- Source :
- Langmuir, Langmuir, American Chemical Society, 2012, 28 (15), pp.6485-6493. ⟨10.1021/la300215q⟩
-
Abstract
- A series of perylene dyes with different optical and electronic properties have been used as photosensitizers in NiO-based p-type dye-sensitized solar cells. A key target is to develop dyes that absorb light in the red to near-infrared region of the solar spectrum in order to match photoanodes optically in tandem devices; however, the photocurrent produced was found to decrease dramatically as the absorption maxima of the dye used was varied from 517 to 565 nm and varied strongly with the electrolyte solvent (acetonitrile, propionitrile, or propylene carbonate). To determine the limitations of the energy properties of the dye molecules and to provide guidelines for future sensitizer design, we have determined the redox potentials of the duodide radical intermediate involved in the charge-transfer reactions in different solvents using photomodulated voltammetry. E degrees(I-3(-)/I-2(center dot-)) (V vs Fe(Cp)(2)(+/0)) = -0.64 for propylene carbonate, -0.82 for acetonitrile, and -0.87 for propionitrile. Inefficient regeneration of the sensitizer appears to be the efficiency-limiting step in the device, and the values presented here will be used to design more efficient dyes, with more cathodic reduction potentials, for photocathodes in tandem dye-sensitized solar cells.
- Subjects :
- Inorganic chemistry
Iodide
perylene dye sensitization optical electronic property differentiation solar cell
02 engineering and technology
010402 general chemistry
triiodide iodide redox couple dye sensitization regeneration solar cell
01 natural sciences
7. Clean energy
Redox
chemistry.chemical_compound
Electrochemistry
[CHIM]Chemical Sciences
General Materials Science
Triiodide
Acetonitrile
Spectroscopy
chemistry.chemical_classification
Surfaces and Interfaces
021001 nanoscience & nanotechnology
Condensed Matter Physics
0104 chemical sciences
Dye-sensitized solar cell
chemistry
Propylene carbonate
Propionitrile
0210 nano-technology
Perylene
Subjects
Details
- ISSN :
- 07437463 and 15205827
- Database :
- OpenAIRE
- Journal :
- Langmuir, Langmuir, American Chemical Society, 2012, 28 (15), pp.6485-6493. ⟨10.1021/la300215q⟩
- Accession number :
- edsair.doi.dedup.....9b5fd58d0643c8fb932766d87227361d