Author/Authors :
Sonar، نويسنده , , Prashant and Oldridge، نويسنده , , Luke and Grimsdale، نويسنده , , Andrew C. and Müllen، نويسنده , , Klaus and Surin، نويسنده , , Mathieu and Lazzaroni، نويسنده , , Roberto and Leclère، نويسنده , , Philippe and Pinto، نويسنده , , Jason and Chua، نويسنده , , Lay-Lay and Sirringhaus، نويسنده , , Henning and Friend، نويسنده , , Richard H.، نويسنده ,
Abstract :
The synthesis of alternating copolymers of tetraalkylindenofluorene with bithiophene and terthiophene using Suzuki polycondensation route is reported. We report on the optical and electrochemical properties of these copolymers. AFM analysis of the microscopic morphology of thin deposits showed that the copolymer with terthiophene units produced the more ordered films, with well-defined fibrillar structures, resulting from highly-regular dense packing due to strong π–π interchain interactions, in contrast to the amorphous bithiophene copolymer. Upon testing these materials in FETs the terthienyl copolymers displayed the higher charge mobilities among the studied compounds, with values of over 10−4 cm2 V−1 s−1 being obtained.
Keywords :
Semiconducting materials , Indenofluorene copolymers , Carrier mobility , Microscopic morphology , charge
