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In this letter, a temperature sensor based on an organic thin film transistor is proposed and discussed in terms of its linearity and reliability of the variation in the subthreshold drain current with temperature. The saturation mobility exhibits thermally activated hopping and temperature-deactivated behavior in different temperature ranges, but the saturation current shows very little change compared to the subthreshold current that is linearly varied with temperature from 273to453K. In addition, sensor reliability can be ensured by placing a time delay between consecutive measurements to release the charges trapped in the dielectric/semiconductor interface, the so-called bias-stress effect.
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Jung et al. (2007) studied this question.
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