Author/Authors :
Lebedev، نويسنده , , A.M. and Menshikov، نويسنده , , K.A. and Stankevich، نويسنده , , V.G. and Svechnikov، نويسنده , , N.Yu. and Ryzkov، نويسنده , , A.V. and Boltalina، نويسنده , , O.V. and Goldt، نويسنده , , I.V. and Ioffe، نويسنده , , I.N. and Kamenskikh، نويسنده , , I.A. and Sidorov، نويسنده , , L.N.، نويسنده ,
Abstract :
Temperature dependences of photoluminescence spectra of C60F18 and C60F24 thin films have been investigated in the range of T = 15 – 300 K . It was established that these spectra of C60F2x compounds strongly vary with temperature. The like behavior could be related to a phase transition of the ferro-electric type with TC∼150–200 K. The reflectivity of C60F18 measured at T = 10 – 300 K manifested a temperature change of peak positions and shape. These experiments support the idea of a phase transition at TC. The luminescence excitation spectra of C60F2x compounds demonstrate changes due to fluorination of the C60 skeleton.
Keywords :
Photoluminescence , Fluorofullerenes , Reflectance , Ferroelectric phase transition
