Abstract

Evidence for photoinduced electron transfer from the excited state of a conducting polymer onto buckminsterfullerene, C 60 , is reported. After photo-excitation of the conjugated polymer with light of energy greater than the π- π* gap, an electron transfer to the C 60 molecule is initiated. Photoinduced optical absorption studies demonstrate a different excitation spectrum for the composite as compared to the separate components, consistent with photo-excited charge transfer. A photoinduced electron spin resonance signal exhibits signatures of both the conducting polymer cation and the C 60 anion. Because the photoluminescence in the conducting polymer is quenched by interaction with C 60 , the data imply that charge transfer from the excited state occurs on a picosecond time scale. The charge-separated state in composite films is metastable at low temperatures.

Keywords

Excited statePhotoinduced electron transferBuckminsterfullerenePhotochemistryPhotoluminescenceMaterials scienceElectron transferExcitationPolymerPicosecondElectron paramagnetic resonancePhotoexcitationMetastabilityPhthalocyanineElectron acceptorChemistryFullereneAtomic physicsNuclear magnetic resonanceOptoelectronicsNanotechnologyOpticsOrganic chemistryPhysics

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Publication Info

Year
1992
Type
article
Volume
258
Issue
5087
Pages
1474-1476
Citations
4218
Access
Closed

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Niyazi Serdar Sariçiftçi, Laura Smilowitz, A. J. Heeger et al. (1992). Photoinduced Electron Transfer from a Conducting Polymer to Buckminsterfullerene. Science , 258 (5087) , 1474-1476. https://doi.org/10.1126/science.258.5087.1474

Identifiers

DOI
10.1126/science.258.5087.1474