Journal ArticleDOI
Solvent vapor annealing in the molecular regime drastically improves carrier transport in small-molecule thin-film transistors.
Hadayat Ullah Khan,Ruipeng Li,Yi Ren,Long Chen,Marcia M. Payne,Unnat S. Bhansali,Detlef-M. Smilgies,John E. Anthony,Aram Amassian +8 more
TLDR
It is demonstrated that QCM-D is a very powerful sensor of the state of the adsorbed solvent as well as the thin film, thus making it suitable for process development aswell as in-line process monitoring both in laboratory and in future manufacturing settings.Abstract:
We demonstrate a new way to investigate and control the solvent vapor annealing of solution-cast organic semiconductor thin films. Solvent vapor annealing of spin-cast films of 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS-Pn) is investigated in situ using quartz crystal microbalance with dissipation (QCM-D) capability, allowing us to monitor both solvent mass uptake and changes in the mechanical rigidity of the film. Using time-resolved grazing incidence wide angle X-ray scattering (GIWAXS) and complementary static atomic force microscopy (AFM), we demonstrate that solvent vapor annealing in the molecular regime can cause significant performance improvements in organic thin film transistors (OTFTs), whereas allowing the solvent to percolate and form a liquid phase results in catastrophic reorganization and dewetting of the film, making the process counterproductive. Using these lessons we devise processing conditions which prevent percolation of the adsorbed solvent vapor molecules for extended peri...read more
Citations
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Journal ArticleDOI
Morphology control strategies for solution-processed organic semiconductor thin films
TL;DR: In this article, a survey of solution-based processing techniques for plastic electronics relevant on both the commercial and research scale and a set of strategies to control thin film morphology towards enhancing their electronic transport properties.
Journal ArticleDOI
Polymorphism as an emerging design strategy for high performance organic electronics
Hyunjoong Chung,Ying Diao +1 more
TL;DR: In this article, the relationship between molecular packing and charge transport is unequivocally established since the chemical structures are identical amongst polymorphs, leaving molecular packing as the only variable in the case of packing polymorphism.
Journal ArticleDOI
Hybrid Perovskite Thin‐Film Photovoltaics: In Situ Diagnostics and Importance of the Precursor Solvate Phases
Rahim Munir,Arif D. Sheikh,Maged Abdelsamie,Hanlin Hu,Liyang Yu,Kui Zhao,Taesoo Kim,Omar El Tall,Ruipeng Li,Detlef-M. Smilgies,Aram Amassian +10 more
TL;DR: The one-step spin-coating process of perovskites is investigated in situ, revealing that thin-film formation is mediated by solid-state precursor solvates and their nature.
Journal ArticleDOI
Entanglement of Conjugated Polymer Chains Influences Molecular Self-Assembly and Carrier Transport
TL;DR: In this article, the authors investigated the effect of polymer entanglement on the self-assembly, molecular packing structure, and microstructure of low-M w (lightly entangled) and high- M w (highly entangled) poly (3-hexylthiophene) (P3HT), and the carrier transport in thin-fi lm transistors.
Journal ArticleDOI
Vertical Phase Separation in Small Molecule:Polymer Blend Organic Thin Film Transistors Can Be Dynamically Controlled
Kui Zhao,Olga Wodo,Olga Wodo,Dingding Ren,Hadayat Ullah Khan,Muhammad Rizwan Niazi,Hanlin Hu,Maged Abdelsamie,Ruipeng Li,Erqiang Li,Liyang Yu,Buyi Yan,Marcia M. Payne,Jeremy Smith,John E. Anthony,Thomas D. Anthopoulos,Sigurdur T. Thoroddsen,Baskar Ganapathysubramanian,Aram Amassian +18 more
TL;DR: In this article, the formation of blends prepared via spin-coating in conditions which yield bilayer and trilayer stratifications was investigated, and the authors used a combination of in situ experimental and computational tools to study the competing effects of formulation thermodynamics and process kinetics in mediating the final vertical stratification.
References
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Journal ArticleDOI
Verwendung von Schwingquarzen zur Wägung dünner Schichten und zur Mikrowägung
TL;DR: In this paper, eigenfrequenz der Platte infolge Vergroserung der schwingenden Masse is vermessen, so das eine empirische Eichung bei der Schichtwagung mit Schwingquarzen entfallt.
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Use of quartz vibration for weighing thin films on a microbalance
G. Sauerbrey,F. Sauerbrey +1 more
Journal ArticleDOI
Electroluminescence in conjugated polymers
Richard H. Friend,R. W. Gymer,A.B. Holmes,J. H. Burroughes,R.N. Marks,Carlo Taliani,Donal D. C. Bradley,D.A. dos Santos,Jean-Luc Brédas,Michael Lögdlund,William R. Salaneck +10 more
TL;DR: Research in the use of organic polymers as active semiconductors in light-emitting diodes has advanced rapidly, and prototype devices now meet realistic specifications for applications.
Journal ArticleDOI
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.
Journal ArticleDOI
Inkjet printing of single-crystal films
Hiromi Minemawari,Toshikazu Yamada,Hiroyuki Matsui,Jun'ya Tsutsumi,Simon Haas,Ryosuke Chiba,Ryosuke Chiba,Reiji Kumai,Reiji Kumai,Tatsuo Hasegawa +9 more
TL;DR: It is shown that mixing fine droplets of an antisolvent and a solution of an active semiconducting component within a confined area on an amorphous substrate can trigger the controlled formation of exceptionally uniform single-crystal or polycrystalline thin films that grow at the liquid–air interfaces.