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Further insights into the photodegradation of poly(3-hexylthiophene) by means of X-ray photoelectron spectroscopy
- Source :
- Thin Solid Films, Thin Solid Films, Elsevier, 2010, sous presse. ⟨10.1016/j.tsf.2010.06.042⟩, Thin Solid Films, 2010, sous presse. ⟨10.1016/j.tsf.2010.06.042⟩
- Publication Year :
- 2010
- Publisher :
- Elsevier BV, 2010.
-
Abstract
- International audience; X-ray photoelectron spectroscopy (XPS) was used to monitor the chemical changes resulting from irradiation (> 295 nm) in air of poly(3-hexylthiophene) (P3HT), polymer which is a good candidate for photovoltaic applications. The formation of carbonyl moieties and the stepwise oxidation of sulphur atoms were characterised. The oxidation and the cleavage of the hexyl side-chain was monitored. It is also shown that sulfur was first converted into sulfoxides, then into sulfones and finally into sulfinate esters. The formation of these ultimate degradation products provoked a disruption of π-conjugation in P3HT, leading to diminished visible absorbance. Based on these results, a mechanism of P3HT photooxidation is proposed. Comparison of XPS data with previously reported infrared and UV-visible spectral analysis showed that the information provided by these techniques is completely consistent.
- Subjects :
- Infrared
chemistry.chemical_element
02 engineering and technology
010402 general chemistry
Photochemistry
01 natural sciences
7. Clean energy
Sulfone
Absorbance
chemistry.chemical_compound
X-ray photoelectron spectroscopy
Materials Chemistry
Irradiation
Photodegradation
chemistry.chemical_classification
Metals and Alloys
Surfaces and Interfaces
Polymer
021001 nanoscience & nanotechnology
Sulfur
0104 chemical sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
[CHIM.POLY]Chemical Sciences/Polymers
chemistry
0210 nano-technology
Subjects
Details
- ISSN :
- 00406090
- Volume :
- 518
- Database :
- OpenAIRE
- Journal :
- Thin Solid Films
- Accession number :
- edsair.doi.dedup.....a4c0419fd40954ed73904846a65999a7