18 September 2013 Design, synthesis, and static charge tuning of organic semiconductors for sensing applications
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Abstract
Organic and polymeric semiconductors are among the alternatives to silicon being considered for sensing devices and circuitry. Their synthesis is now well established, and some performance metrics such as charge carrier mobility and optoelectronic quantum yield exceed those of inorganic counterparts such as amorphous silicon. The best fit for organic semiconductors is in applications where inherent capabilities such as rational modification of carrier energy levels and covalent connection between charge channels and surface receptors are leveraged. This presentation will describe newly synthesized organic molecular solids and polymer films where these attributes are emphasized. For example, addition of a borane to a semiconductor enhances response to ammonia, and introduction of highly electron donating tetrathiafulvalenes into moderately electron-rich polymers enhances response to electron-poor analytes (for example, TNT), for the development of chemical sensors. Carrier energy levels are markedly and predictably altered by static charge embedded in polystyrene films adjacent to organic semiconductors, for multiple device activities to be obtained from a single device layout using one semiconductor, and also the avoidance of powering gate electrodes to set optimal sensor sensitivities during operation.
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Howard E. Katz, Weiguo Huang, Jasmine Sinha, Hoyoul Kong, Kalpana Besar, Thomas J. Dawidczyk, "Design, synthesis, and static charge tuning of organic semiconductors for sensing applications", Proc. SPIE 8831, Organic Field-Effect Transistors XII; and Organic Semiconductors in Sensors and Bioelectronics VI, 88311G (18 September 2013); doi: 10.1117/12.2022916; https://doi.org/10.1117/12.2022916
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