Synthesis of New Fluorene-Indolocarbazole Alternating Copolymers for Light-Emitting Diodes and Field Effect Transistors
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In this article, a hole transporting indolocarbazole with different linkages was proposed to enhance hole transporting properties and thermal properties of polyfluorene for the applications of light-emitting diodes and field effect transistors.Abstract:
New alternating copolymers of poly(2,7-(9,9′-dihexylfluorene)-alt-3,9-(5,11-di(2-ethylhexyl)-indolo[3,2-b]carbazole)) (PF-p-In) and poly(2,7-(9,9′-dihexylfluorene)-alt-2,8-(5,11-di(2-ethylhexyl)-indolo[3,2-b]carbazole)) (PF-m-In) were synthesized by palladium-catalyzed Suzuki coupling polymerization and characterized for the applications of light-emitting diodes and field effect transistors (FET). The incorporation of indolocarbazole into polyfluorene could not only enhance hole transporting properties but also thermal properties. The para-linkage, PF-p-In, facilitates π-electron delocalization and thus has a lower optical band gap and a higher emission maximum than those of the meta linkage, PF-m-In. The electroluminescence devices based on PF-p-In and PF-m-In as the emissive layer show a similar maximum luminance but with different emissive colors of green and blue, respectively. The FET hole mobilities of PF-p-In and PF-m-In are 6.73×10−5 and 1.50×10−4 cm2/V·s, respectively, which are significantly higher than that of polyfluorene. The present study demonstrates the electronic and optoelectronic properties of polyfluorene enhanced by incorporating hole transporting indolocarbazole with different linkages.read more
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References
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Journal ArticleDOI
Polymer photovoltaic cells : enhanced efficiencies via a network of internal donor-acceptor heterojunctions
TL;DR: In this paper, the carrier collection efficiency and energy conversion efficiency of polymer photovoltaic cells were improved by blending of the semiconducting polymer with C60 or its functionalized derivatives.
Journal ArticleDOI
High-efficiency solution processable polymer photovoltaic cells by self-organization of polymer blends
TL;DR: In this article, the authors report highly efficient polymer solar cells based on a bulk heterojunction of polymer poly(3-hexylthiophene) and methanofullerene.
Journal ArticleDOI
Electroluminescent conjugated polymers : seeing polymers in a new light
TL;DR: A new exciting interdisciplinary research field has evolved following the discovery that conjugated polymers can emit light when put into light-emitting diodes.
Journal ArticleDOI
General observation of n-type field-effect behaviour in organic semiconductors
Lay-Lay Chua,Lay-Lay Chua,Jana Zaumseil,Jui Fen Chang,Eric C.W. Ou,Peter K. H. Ho,Peter K. H. Ho,Henning Sirringhaus,Richard H. Friend +8 more
TL;DR: It is demonstrated that the use of an appropriate hydroxyl-free gate dielectric—such as a divinyltetramethylsiloxane-bis(benzocyclobutene) derivative (BCB; ref. 6)—can yield n-channel FET conduction in most conjugated polymers, revealing that electrons are considerably more mobile in these materials than previously thought.
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Soluble and processable regioregular poly(3‐hexylthiophene) for thin film field‐effect transistor applications with high mobility
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.