Abstract
The paper investigates the temperature dependence of the electrical characteristics of an organic thin film transistor (OTFT), through the development of an analytical model based on the MTR (multiple trapping and release) mechanism, that is related to an exponential density of states in the organic semiconductor layer at the insulator interface. The aim is to realize a simple single-ended organic sensor, consisting of a diode-connected OTFT, with a high sensitivity and linearity in a wide temperature range (from 230 to 330 K). The fabricated sensor shows the maximum linearity of 99.95% at a bias current of 22 nA with a sensitivity of about 100 mV/K, exceeding that of silicon-based sensors, and a good stability with an error lower than 1%. The model used to describe the device behavior demonstrates that the linearity is given by the compensation of two non-linear functions of temperature.
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Liguori, R., Licciardo, G.D., Di Benedetto, L. (2023). Modeling of an Organic Thin Film Transistor as Temperature Sensor. In: Di Francia, G., Di Natale, C. (eds) Sensors and Microsystems. AISEM 2021. Lecture Notes in Electrical Engineering, vol 918. Springer, Cham. https://doi.org/10.1007/978-3-031-08136-1_38
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DOI: https://doi.org/10.1007/978-3-031-08136-1_38
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