Electrospun fibers of poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-bithiophene] (F8T2) with exceptional electro-optical performance are obtained. The I/T characteristics measured in fibers with 715 mu m diameter and 1mm length show a semiconductor behavior; their thermal activation energy is 0.5eV and the dark conductivity at RT is 5x109 (cm)1. Besides exhibiting a photosensitivity of about 60 under white light illumination with a light power intensity of 25mW center dot cm2, the fibers also attain RT photoluminescence in the cyan, yellow, and red wavelength range under ultraviolet, blue, and green light excitation, respectively. Optical microscope images of F8T2 reveal homogeneous electrospun fibers, which are in good agreement with the uniformly radial fluorescence observed.
- electrospun fibers