Infrared Spectra and Photoinduced Absorption of C<sub>60</sub> Doped Polyhexylthiophene
S. LuzzatiF. SperoniAnvar Zakhidovb Department of Thermophysics , Uzbek Academy of Science , Tashkent , UzbekistanShigenori Moritac Department of Electronic Engineering , Faculty of Engineering, Osaka University , JapanKatsumi Yoshinoc Department of Electronic Engineering , Faculty of Engineering, Osaka University , Japan
ABI
Annotatsiya
Abstract We report the IR spectra and the photoinduced absorption of polyhexylthiophene(PHT) doped with C60. The presence of C60 −n anions is observed in the IR spectra by a mode at 1383 cm−1 and a broad electronic transition at 1.2 eV, while most of the C60 molecules stay neutral. This is indicative that for a small fraction of C60 molecules, charge transfer occurs in the ground state. The photoinduced absorption spectra display a sharp transition at 1.15 eV peculiar to C60 monoanion, the spectral features change with fullerene concentration. The intensity of the polymer photoinduced bands increases 5-10 times due to photoinduced charge transfer to C60.
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