High performance airbrushed organic thin film transistors

Abstract

Spray-deposited poly-3-hexylthiophene (P3HT) transistors were characterized using electrical and structural methods. Thin-film transistors with octyltrichlorosilane treated gate dielectrics and spray-deposited P3HT active layers exhibited a saturation regime mobility as high as 0.1 cm2 V−1 s−1, which is comparable to the best mobilities observed in high molecular mass P3HT transistors prepared using other methods. Optical and atomic force microscopy showed the presence of individual droplets with an average diameter of 20 μm and appreciable large-scale film inhomogeneities. Despite these inhomogeneities, near-edge x-ray absorption fine structure spectroscopy of the device-relevant channel interface indicated excellent orientation of the P3HT.

Versatile Organic Transistors by Solution Processing

“…[180] A similar technique was employed by Chan et al to fabricate OTFT devices from spray-deposited poly-3-hexylthiophene (P3HT) in a 6:1 chlorobenzene:1,2,3,4-tetrahydronaphthalene solution on OTS-treated gate dielectrics exhibiting mobilities as high as 0.1 cm 2 V À1 s À1 . [173] As they noted, this performance was comparable to the best mobilities observed in P3HT by using other preparation methods. .…”

Roll‐to‐Roll fabrication of large area functional organic materials

“…96 Still, most of the devices containing polymer materials are fabricated by sheet-to-sheet methods using R2R-compatible processes such as inkjet, 63,97 gravure, 64,65 screen printing, 66 and spray coating. 98 Kang et al, for example, utilize an optimized microgravure process to print silver patterns and poly(4-vinyl phenol) (PVP) dielectric layers. 99 A transistor with record transition frequencies of >300 kHz was achieved with a spin-coated organic semiconductor poly(2,5-bis(3-alkythiophen-2-yl)thieno [3,2-b] thiophene) (pBTTT).…”

Injection molding electroluminescent components

“…The INSPIRE process was taken as a base application method for the research presented here and layer dispersion techniques, such as ultrasonic, electrospray, and airbrush, were considered as in‐mold layer application techniques [29, 30]. Polymer EL materials are solution based and lend themselves to spray deposition processes; these techniques also have the ability to easily apply a series of different layer materials and onto a 3D, contoured surface.…”

“…Polymer EL materials are solution based and lend themselves to spray deposition processes; these techniques also have the ability to easily apply a series of different layer materials and onto a 3D, contoured surface. Successful research has already been carried out [29–34] into applying organic electroactive, EL and photovoltaic materials using such methods and therefore it seems a suitable technique for applying EL materials in‐mold. The surface roughness was not factored into these initial scoping experiments.…”