Letter abstract
Nature Materials 3, 106 - 110 (2004)
doi:10.1038/nmat1061
Subject Categories: Polymers | Electronic materials | Semiconductors | Optical, photonic and optoelectronic materials
Flexible active-matrix displays and shift registers based on solution-processed organic transistors
Gerwin H. Gelinck1, H. Edzer A. Huitema1, Erik van Veenendaal1, Eugenio Cantatore1, Laurens Schrijnemakers1, Jan B. P. H. van der Putten1, Tom C. T. Geuns1, Monique Beenhakkers1, Jacobus B. Giesbers1, Bart-Hendrik Huisman1, Eduard J. Meijer1, Estrella Mena Benito1, Fred J. Touwslager1, Albert W. Marsman1, Bas J. E. van Rens1 and Dago M. de Leeuw1
At present, flexible displays are an important focus of research1, 2, 3. Further development of large, flexible displays requires a cost-effective manufacturing process for the active-matrix backplane, which contains one transistor per pixel. One way to further reduce costs is to integrate (part of) the display drive circuitry, such as row shift registers, directly on the display substrate. Here, we demonstrate flexible active-matrix monochrome electrophoretic displays based on solution-processed organic transistors on 25-
m-thick polyimide substrates. The displays can be bent to a radius of 1 cm without significant loss in performance. Using the same process flow we prepared row shift registers. With 1,888 transistors, these are the largest organic integrated circuits reported to date. More importantly, the operating frequency of 5 kHz is sufficiently high to allow integration with the display operating at video speed. This work therefore represents a major step towards 'system-on-plastic'.
- Philips Research Laboratories, Prof. Holstlaan 4, 5656AA Eindhoven, The Netherlands
Correspondence to: Gerwin H. Gelinck1 e-mail: gerwin.gelinck@philips.com
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