Journal ArticleDOI
Charge Carrier Mobility in Blends of Poly(9,9-dioctylfluorene) and Poly(3-hexylthiophene)
Amit Babel,Samson A. Jenekhe +1 more
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A series of 10 binary blends of poly(9,9-dioctylfluorene) and regioregular poly(3-hexylthiophene) were investigated and found to be phase separated and to exhibit high field-effect mobility of holes.Abstract:
A series of 10 binary blends of poly(9,9-dioctylfluorene) and regioregular poly(3-hexylthiophene) were investigated and found to be phase separated and to exhibit high field-effect mobility of holes. The mobility of holes determined from blend thin film transistors was in the range of 2.0 × 10-4−1 × 10-3 cm2/(V s) in blends of 10−80 wt % poly(9,9-dioctylfluorene). A concave-upward dependence of hole mobility on blend composition was found with a minimum in mobility around the symmetric blend composition (50 wt %). The field-effect mobility of holes in poly(9,9-dioctylfluorene) homopolymer could not be determined directly because of the barrier to charge injection from gold electrodes. However, from the composition-dependent field-effect mobility of holes in the series of binary blends, we estimated the hole mobility in poly(9,9-dioctylfluorene) homopolymer to be (6−10) × 10-4 cm2/(V s), which is in good agreement with previous results obtained by the time-of-flight technique. These results demonstrate tha...read more
Citations
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Journal ArticleDOI
Semiconducting π-conjugated systems in field-effect transistors: a material odyssey of organic electronics.
TL;DR: The focus of this review will be on the performance analysis of π-conjugated systems in OFETs, a kind of device consisting of an organic semiconducting layer, a gate insulator layer, and three terminals that provide an important insight into the charge transport of ρconjugate systems.
Journal ArticleDOI
Organic semiconductors for solution-processable field-effect transistors (OFETs).
TL;DR: Micro- or nanocrystalline materials have the general advantage of somewhat higher charge-carrier mobilities, which, however, could be offset in the case of amorphous, glassy materials by simpler and more reproducible processing.
Journal ArticleDOI
Recent advances of the emitters for high performance deep-blue organic light-emitting diodes
TL;DR: In this article, the crucial tactics employed to obtain high performance deep-blue emitters are presented, including polymers, dendrimers, small organic molecules, delayed fluorescent systems, and phosphorescent emitters.
Journal ArticleDOI
Conjugated donor-acceptor copolymer semiconductors with large intramolecular charge transfer : Synthesis, optical properties, electrochemistry, and field effect carrier mobility of thienopyrazine-based copolymers
TL;DR: Several conjugated thieno[3,4b]pyrazine-based donor-acceptor copolymers were synthesized by Stille and Suzuki copolymerizations, and their optical, electrochemical, and field-effect charge transport properties were characterized.
Journal ArticleDOI
Simultaneous optimization of charge-carrier mobility and optical gain in semiconducting polymer films.
TL;DR: This work reports a new strategy, comprising the introduction of a limited number of more effective hopping sites between otherwise relatively isolated, and thus highly luminescent, polyfluorene chains, that results in polymer films with large mobility and simultaneously excellent light-emission characteristics.
References
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Journal ArticleDOI
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TL;DR: In this paper, the electrical characteristics of field effect transistors using solution cast regioregular poly(3-hexylthiophene) are discussed and the authors demonstrate that both high field effect mobilities (ca. 0.045 cm2/V) and relatively high on/off current ratios (greater than 103) can be achieved.
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