Air‐Stable and High‐Mobility n‐Channel Organic Transistors Based on Small‐Molecule/Polymer Semiconducting Blends

Abstract

Although the performance of organic thin-film transistors (OTFTs) has increased significantly over the last decade, it still remains challenging to fabricate large area arrays of transistors with good device-to-device parameter uniformity.[1] Approaches based on the use of solution processable organic semiconductors are attractive, both in terms of throughput and the ability to pattern the semiconductor directly onto a range of substrate materials such as plastic. In terms of organic semiconductors, both soluble small molecules and polymers are viable materials classes with the former often being advantageous in terms of the higher charge carrier mobilities that can be obtained in OTFTs. Despite this significant advantage, however, the processing of highly crystalline small molecules into uniform thin films over large area substrates is often much more challenging than polymers, especially with respect to

Single Crystal‐Like Performance in Solution‐Coated Thin‐Film Organic Field‐Effect Transistors

“…S4) and of one order of magnitude lower than some of the values previously reported for films of other small molecule-polymer blends, where a relatively larger roughness was attributed to the segregation and crystallization of the molecules at the film/air interface. [27][28][29] In our case, the smoothness of the film is indicative that the DB-TTF crystals are embedded in the polymeric matrix. The total thickness of the DB-TTF/PS film was estimated by AFM to be around 29±4 nm (Fig.…”

Printable ammonia sensor based on organic field effect transistor

“…Poly (3;3 000 -didodecylquaterthiophene) (PQT-12) and 2,2 0 -[(2,5-dihexadecyl-3,6-dioxo-2,3,5,6-tetrahydropyrrolo[3,4-c]pyrrole-1,4-diylidene)dithiene-5,2-diylidene] dimalononitrile (DPP-CN) were synthesized in our laboratory. DPP-CN [24] was prepared according to modified literature procedures. For PQT-12 synthesis, 5,5 0 -bis(trimethylstannyl)-2,2 0 -bithiophene was purchased from Sigma-Aldrich and was further recrystallized for polymerization.…”

Effect of Solution Shearing Method on Packing and Disorder of Organic Semiconductor Polymers

“…[1][2][3][4][5][6] The basic device element of organic electronics is the thin film transistor (TFT), and current research effort is focused on improving the charge transport properties of the organic semiconductors (OSCs) in TFTs. TFTs can be fabricated over a large area by using solution deposition methods such as rollto-roll coating, spin coating, inkjet printing etc.…”