Temperature and electric field dependent hole mobility in a polyfluorene copolymer |
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| Authors: | Francesca Tinti Siraye E Debebe Wendimagegn Mammo Teketel Yohannes Nadia Camaioni |
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| Affiliation: | 1. Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche, via P. Gobetti 101, I-40129 Bologna, Italy;2. Department of Chemistry, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia |
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| Abstract: | Transport of holes in thin films of a low-bandgap alternating polyfluorene copolymer, APFO-Green5, was investigated by means of admittance spectroscopy as a function of field and temperature. The values of hole mobility were evaluated from the position of the maxima in the plots of the negative differential susceptance as a function of frequency. Hole mobility was found to be strongly field- and temperature-dependent. The charge transport parameters were extracted by analyzing the mobility data by the uncorrelated and the correlated Gaussian Disorder Models. |
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