LONDON OLED specialist Novaled AG (Dresden, Germany) has teamed with the Eindhoven, Netherlands based Holst Centre on the development and exploitation of Organic Thin Film Transistors (OTFT) using the Novaled PIN OLED technology and materials.
The initial focus of the joint research is to investigate the feasibility and benefits of Novaled's dopants in the Holst Centre's organic thin film transistor technologies qualified for displays and circuits.
The Holst Centre, a joint research undertaking between nanoelectronics research center IMEC (Leuven, Belgium) and the Dutch research center TNO (Eindhoven, The Netherlands), was formed in 2005 and focuses on research into wireless autonomous transducers and systems-in-foil.
Novaled says its doping technology contributes to high power efficiencies and long lifetimes in OLEDs by improving charge carrier injection and transport in the organic layers, and that its researchers have shown that these effects are also relevant for organic TFT as the carrier injection from drain and source into the organic material has a major influence on the device performance.
The company is already developing dopant and host materials which can be processed both in vacuum and in solution.
According to Jan Blochwitz-Nimoth, CTO of Novaled, OTFT's will be integrated in display backplanes and other driving electronics like organic RFID (radio-frequency identity tags).
"They will change the way we use electronics today through several advantages of organic electronic devices such as large area compatibility, reduced costs, easy manufacturability and environmental sustainability," said Blochwitz-Nimoth.
Gerwin Gelinck, Program Manager for organic circuitry at the Holst Centre, said that by collaborating with companies like Novaled and combining their materials with the Centre's process integration expertise, "cutting edge processes and prototypes are developed that will accelerate introduction of organic transistor products to the market."
OTFTs are semiconductor devices that use organic materials to conduct charges between source and drain electrodes which are controlled by a third gate electrode. The production costs of OTFTs for large areas are expected to be low enough to address numerous applications.
The researchers say OTFTs are well suited for applications like flexible displays, intelligent food packaging and paper identification (ID) documents.
Two key challenges are said to be to push the transistor performance using novel semiconductor materials that can be processed at low temperatures, and to integrate the transistors in increasingly complex organic circuitries.
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