Wafer-scale, layer-controlled organic single crystals for high-speed circuit operation
Open Access
- 31 January 2018
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science Advances
- Vol. 4 (2), eaao5758
- https://doi.org/10.1126/sciadv.aao5758
Abstract
Two-dimensional (2D) layered semiconductors are a novel class of functional materials that are an ideal platform for electronic applications, where the whole electronic states are directly modified by external stimuli adjacent to their electronic channels. Scale-up of the areal coverage while maintaining homogeneous single crystals has been the relevant challenge. We demonstrate that wafer-size single crystals composed of an organic semiconductor bimolecular layer with an excellent mobility of 10 cm(2) V-1 s(-1) can be successfully formed via a simple one-shot solution process. The well-controlled process to achieve organic single crystals composed of minimum molecular units realizes unprecedented low contact resistance and results in high-speed transistor operation of 20 MHz, which is twice as high as the common frequency used in near-field wireless communication. The capability of the solution process for scale-up coverage of high-mobility organic semiconductors opens up the way for novel 2D nanomaterials to realize products with large-scale integrated circuits on film-based devices.Keywords
Funding Information
- JSPS KAKENHI (award356190, JP17H06123, JP17H06200)
- PRESTO-JST (award356187, JPMJPR151E)
- PRESTO-JST (award356189, JPMJPR13K5)
- LEADER-JSPS (award356188)
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