Phthalocyanine/C60 composites as improved photosensitive materials

Autor:	Wolfgang Eberhardt, B. Kessler, J. Morenzin, C. Schlebusch
Rok vydání:	1999
Předmět:	chemistry.chemical_classification Electron mobility Thin layers Dopant Photoconductivity General Physics and Astronomy Electron acceptor Photochemistry chemistry.chemical_compound chemistry Phthalocyanine Charge carrier Physical and Theoretical Chemistry Luminescence
Zdroj:	Physical Chemistry Chemical Physics. 1:1765-1767
ISSN:	1463-9084 1463-9076
DOI:	10.1039/a808599d
Popis:	We have investigated the influence of C60-fullerenes as a dopant in thin layers of phthalocyanines (Pc). We expect that C60 acts as an electron acceptor. Charge transfer of an electron from the first excited state of the Pc to C60 occurs, thus leading to an enhanced number of free holes, which are the majority charge carriers in phthalocyanine. The observation of luminescence in co-evaporated layers of phthalocyanines and C60 shows a fluorescence quenching depending on the amount of fullerenes. This shows that the admixture of C60 reduces direct recombination of electron–hole pairs and thereby increases the charge-generation efficiency. The effect on photoconductivity is established by electro-optical measurements, which show an improved current–voltage characteristic of C60-doped phthalocyanine layers.
Databáze:	OpenAIRE
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