Growth of organic n-conductors on thin polymer films for use in organic field effect transistors

2004 ◽  
Vol 212 (1) ◽  
pp. 299-306 ◽  
Author(s):  
W. Michaelis ◽  
C. Kelting ◽  
A. Hirth ◽  
D. Wöhrle ◽  
D. Schlettwein
Keyword(s):  
Polymer Films ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Organic N ◽  
Organic Field Effect Transistors ◽  
Thin Polymer Films ◽  
Thin Polymer

Mitigating Meniscus Instabilities in Solution-Sheared Polymer Films for Organic Field-Effect Transistors

2019 ◽  
Vol 11 (33) ◽  
pp. 30079-30088 ◽  
Author(s):  
Cecilia Teixeira da Rocha ◽  
Ge Qu ◽  
Xuegeng Yang ◽  
Rishi Shivhare ◽  
Mike Hambsch ◽  
...  
Keyword(s):  
Polymer Films ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Organic Field Effect Transistors

Thin insulating polymer films as dielectric layers for phthalocyanine-based organic field effect transistors

2006 ◽  
Vol 10 (10) ◽  
pp. 1179-1189 ◽  
Author(s):  
Christian Kelting ◽  
Wilfried Michaelis ◽  
Andreas Hirth ◽  
Dieter Wöhrle ◽  
Derck Schlettwein
Keyword(s):  
Thin Films ◽  
Polymer Films ◽  
Field Effect ◽  
Field Effect Transistors ◽  
High Vacuum ◽  
Dielectric Behavior ◽  
Organic Field Effect Transistors ◽  
Electrical Measurements ◽  
Dielectric Layers ◽  
Vis Spectroscopy

Films of organic polymers were prepared and investigated as insulating layers in contact with phthalocyanines as organic semiconductors for use in organic field effect transistors. The polymer films were obtained either by a high-vacuum technique based on the thermal decomposition of polymers and polymerization of the fragments on a substrate, by the spin-coating of polymer solutions or by the cross-linking of spin-coated precursors. Poly(vinylchloride), poly(vinylidenefluoride), poly(acrylonitrile), poly(methylmethacrylate), poly( N -vinylpyrrolidone), poly(styrene), poly(4-vinylpyridine), poly( N -vinylcarbazole) and a polyimide were used as polymers. The film growth was studied by mass spectrometry and infrared spectroscopy. Electrochemical measurements by cyclic voltammetry served to analyze the properties of the polymer films. The morphology was determined by atomic force microscopy. Interactions of the films with phthalocyaninatozinc ( PcZn ) was analyzed for co-evaporated PcZn in the polymer films, to probe the chemical compatibility of the methods. Subsequently, evaporated PcZn or hexadecafluorophthalocyaninato-oxo-vanadium ( F 16 PcVO ) thin films were studied in detail by UV-vis spectroscopy and by electrical measurements to investigate interface formation, intermolecular coupling and electrical conduction in such films. The applicability of the different polymers as dielectric layers in organic field effect transistors, with phthalocyanines as the active semiconductor thin films, is discussed, based on their dielectric behavior and observed growth characteristics.

Solvent-Assisted Re-annealing of Polymer Films for Solution-Processable Organic Field-Effect Transistors

2010 ◽  
Vol 22 (11) ◽  
pp. 1273-1277 ◽  
Author(s):  
Chong-an Di ◽  
Kun Lu ◽  
Lei Zhang ◽  
Yunqi Liu ◽  
Yunlong Guo ◽  
...  
Keyword(s):  
Polymer Films ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Organic Field Effect Transistors ◽  
Solution Processable

Organic n-channels of substituted phthalocyanine thin films grown on smooth insulator surfaces for organic field effect transistors applications

2004 ◽  
Vol 19 (7) ◽  
pp. 2040-2048 ◽  
Author(s):  
W. Michaelis ◽  
D. Wöhrle ◽  
D. Schlettwein
Keyword(s):  
Thin Films ◽  
Field Effect ◽  
Physical Vapor Deposition ◽  
Field Effect Transistors ◽  
High Vacuum ◽  
Organic N ◽  
Optical Absorption Spectroscopy ◽  
Electronic Coupling ◽  
Organic Field Effect Transistors ◽  
Polymer Substrates

Thin films of the perfluorinated phthalocyanines F16PcVO and F16PcCu were grown on insulator substrates by physical vapor deposition under high vacuum conditions to study their growth and electrical properties, analyzing them as possible candidates for n-type channel materials in organic field effect transistors. As insulator substrates, mica, amorphous SiO2, poly(styrene), poly(vinylchloride), poly(vinylcarbazole), poly(methylmetacrylate) and poly(vinylidenefluoride) were chosen, offering chemically different interactions with the molecules, degrees of order, and tribological characteristics. Optical absorption spectroscopy was used to analyze the alignment of the molecules relative to the substrates and the electronic coupling to adjacent molecules in the films. Electrical conduction measurements served to analyze the electronic coupling of the molecules parallel to the insulating substrates and to discuss the growth mode of films. Atomic force microscopy and scanning electron microscopy were chosen to study the morphology of the films. An inclined orientation at an average surface angle between 58° and 86° dependent on the different substrates was found for both F16Pc. In particular, on mica, thin conductive channels of the organic n-semiconductors could be formed at an average film thickness well below 10 nm at conductivities of up to 1.3 × 10-2 S cm-1. Conductive channels could also be formed on the different polymer substrates at, however, at least an order of magnitude smaller conductivity. Before these layers were formed on the polymers, semiconductor material diffused into the polymer substrates, dependent upon the substrate temperature during deposition relative to the glass transition temperature of the polymers. An influence of the viscous state of the polymer substrates was also seen on the intermolecular coupling detected in optical spectra. Based on these results, implications for the applicability of F16Pc as organic n-channels in organic field effect transistors are discussed.

scholarly journals Uniaxial Alignment of Conjugated Polymer Films for High-Performance Organic Field-Effect Transistors

2018 ◽  
Vol 30 (20) ◽  
pp. 1705463 ◽  
Author(s):  
Dongyoon Khim ◽  
Alessandro Luzio ◽  
Giorgio Ernesto Bonacchini ◽  
Giuseppina Pace ◽  
Mi-Jung Lee ◽  
...  
Keyword(s):  
Polymer Films ◽  
Conjugated Polymer ◽  
Field Effect ◽  
High Performance ◽  
Field Effect Transistors ◽  
Organic Field Effect Transistors
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