Ultrathin organic transistors for chemical sensing
- 25 June 2007
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 90 (26) , 263506
Abstract
Ultrathin cobalt phthalocyanine transistors of 4 ML have been fabricated for chemical sensing. Compared to 50 ML devices, the ultrathin transistors show faster response times, higher base line stabilities, and sensitivity enhancements of 1.5–20 for the five analytes tested. The enhanced response for the ultrathin transistors provides insight into the device physics. The absorption of analytes changes the surface doping level and trap energies. The changes in surface trap energies perturb the charge transport properties of the ultrathin devices, thereby, making these devices more sensitive.Keywords
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