Author/Authors :
Zenz، نويسنده , , C. and Cerullo، نويسنده , , G. and Lanzani، نويسنده , , G. and Graupner، نويسنده , , W. and Meghdadi، نويسنده , , F. and Silvestri، نويسنده , , S. De and Leising، نويسنده , , G.، نويسنده ,
Abstract :
The photoexcitations in the visible and near infrared spectral region of textured polycrystalline para-hexaphenyl (PHP) films are investigated by ultrafast pump-probe spectroscopy. We observe a strong stimulated emission band at 2.7 eV and photoinduced absorption bands. We assign this features to singlet exciton, triplet exciton, and polaron absorption, using field assisted pump-probe measurements.
Keywords :
Time-resolved fast spectroscopy , organic semiconductors based on conjugated molecules , Photoinduced absorption spectroscopy
