Neudrive Limited

Cpi Innovation Services Limited

Wuhan Xinqu Chuangrou Optoelectronics Technology Co., Ltd

Marco Palumbo

Simon Dominic Ogier

Beverley Anne Brown

Keri Laura McCall

Raymond Fisher

Michael James Simms

Neil David Forrest

Aaron James Page

Stuart Edmund Willetts

Julie Diane Ellis Jones

Keri Laura Mccall

A semiconductor composition which comprises a soluble polyacene semiconductor and a polymeric semiconducting binder the binder having a permittivity greater than 3.4 at 000 Hz. The charge mobility of the semiconducting binder when measured in a pure state is greater than 10cm/Vs and more preferably greater than 10cm/Vs. Organic thin film transistors in which the source and drain electrodes are bridged by the semiconductor composition have desirable properties of reproducibility and charge mobility. The organic semiconducting composition can be applied by solution coating.

Transistors and methods for making them

This invention comprises a field effect transistor which comprises source and drain electrodes () which are bridged by a semiconductor which comprises semiconducting crystallites, the conductivity of the semiconductor being controlled by a gate electrode () which is insulated from the semiconductor and the source and drain electrodes, to which a potential is applied for controlling the conductivity of the semiconductor, in which at least part of the facing surfaces of the source and drain electrodes are geometrically formed such that they provide current flow of different directions between the electrodes through the said channel. By this means current is caused to flow through more orientations of the crystals resulting in greater uniformity of performance between different transistors when there is a degree of variable crystallographic orientation.

Transistors

This invention comprises a semiconducting polymer having a permittivity greater than 3.4 at 1000 Hz and a charge mobility in the pure state greater than 10cmVsand more preferably greater than 10cmVs. Preferred polymers include repeating units of triarylamines which have specific cyano and/or alkoxy substitution. They are suitable for use in electronic components such as organic thin film transistors.

Semiconductor compounds

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Liverpool, United Kingdom

Marco Palumbo