Journal ArticleDOI
Evaporation-Induced Self-Organization of Inkjet-Printed Organic Semiconductors on Surface-Modified Dielectrics for High-Performance Organic Transistors
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TLDR
The results indicate that the control of both the evaporation behavior and the contact line dynamics in a drying droplet plays an important role in the printing of organic semiconductor films with uniform morphology and desired molecular orientation for the direct-write fabrication of high-performance organic transistors.Abstract:
We demonstrate the influence of the surface wettability of a dielectric substrate on the crystalline microstructure and film morphology of an inkjet-printed organic semiconductor, namely 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS_PEN), using various self-assembled monolayers (SAMs). Self-aligned crystals with highly ordered crystalline structure are developed by printing on hydrophilic surfaces with high surface energy. It is found that the pinning of the contact line induces an outward convective flow as the evaporation proceeds, which results in the nucleation of crystals and the self-assembly of TIPS_PEN molecules from the periphery to the central region of the droplet. However, for hydrophobic surfaces with low surface energy, small agglomerates with random orientation of molecules are formed, which is induced by depinning of the contact line. The field-effect transistors fabricated with self-organized crystals printed on hydrophilic surfaces exhibit a high field-effect mobility of 0.15 cm2 V−...read more
Citations
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Journal ArticleDOI
Advances in Charge Carrier Mobilities of Semiconducting Polymers Used in Organic Transistors
TL;DR: In this article, the authors describe and discuss recent advances in the performance of polymeric semiconductors in organic field effect transistors (OFETs) and discuss the relationship between the molecular design, thin film microstructure, and electrical performance.
Journal ArticleDOI
Recent Advances in Organic Transistor Printing Processes
TL;DR: The principles underlying the OFET printing techniques are introduced according to two categories: direct write printing and transfer printing.
Journal ArticleDOI
Patterning of controllable surface wettability for printing techniques
TL;DR: This review summarizes the recent research on and applications of patterning of controllable surface wettability for printing techniques, with a focus on the design and fabrication of the precise surfaceWettability patterning by enhancing the contrast of hydrophilicity and hydrophobicity, such as superhydrophilic and superhydrophic patterning.
Journal ArticleDOI
Transparent flexible organic transistors based on monolayer graphene electrodes on plastic.
Wi Hyoung Lee,Jaesung Park,Sung Hyun Sim,Sae Byeok Jo,Kwang S. Kim,Byung Hee Hong,Kilwon Cho +6 more
TL;DR: One-atom-thick monolayer graphene provides ideal source/drain electrodes for effi cient charge injection in organic transistors assembled on plastic substrates because the synthesis of either graphene or reduced graphene oxide requires high-temperature fabrication processes.
Journal ArticleDOI
Controlled Deposition of a High‐Performance Small‐Molecule Organic Single‐Crystal Transistor Array by Direct Ink‐Jet Printing
TL;DR: The single-crystal formation in bottom-contact-structured transistors via direct printing is expected to permit high-density array fabrication in large-area electronics.
References
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Journal ArticleDOI
Capillary flow as the cause of ring stains from dried liquid drops
TL;DR: In this article, the authors ascribe the characteristic pattern of the deposition to a form of capillary flow in which pinning of the contact line of the drying drop ensures that liquid evaporating from the edge is replenished by liquid from the interior.
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High-Resolution Inkjet Printing of All-Polymer Transistor Circuits
Henning Sirringhaus,Takeo Kawase,Richard H. Friend,Tatsuya Shimoda,M. Inbasekaran,Weishi Wu,E. P. Woo +6 more
TL;DR: It is shown that the use of substrate surface energy patterning to direct the flow of water-based conducting polymer inkjet droplets enables high-resolution definition of practical channel lengths of 5 micrometers, and high mobilities were achieved.
Journal ArticleDOI
Contact line deposits in an evaporating drop
TL;DR: A theory is described that predicts the flow velocity, the rate of growth of the ring, and the distribution of solute within the drop that is driven by the loss of solvent by evaporation and the geometrical constraint that the drop maintain an equilibrium droplet shape with a fixed boundary.
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Inkjet Printing of Polymers: State of the Art and Future Developments
TL;DR: Inkjet printing is considered to be a key technology in the field of defined polymer deposition as mentioned in this paper, and a short overview of the available instrumentation is given, including manufacturing of multicolor polymer light-emitting diode displays, polymer electronics, three-dimensional printing, and oral dosage forms for controlled drug release.
Journal ArticleDOI
Functionalized Pentacene: Improved Electronic Properties from Control of Solid-State Order
TL;DR: The preparation of two functionalized pentacene derivatives, and the effect of this functionalization on both the solid-state ordering and the electronic properties of the resulting crystals is reported.