Organic Field Effect Transistor (OFET) for H2S sensing Using Tris(keto-hydrozone)
Yuvaraja, Saravanan; Surya, Sandeep; B.N, Veerabhadraswamy; C.V, Yelamaggad; Salama, Khaled N.
Due to the ever-growing amount of air pollution, the need of the hour is to find an instant solution to warn the population and to protect the health of working class. There exist a tremendous need for a device to sense the H2S gas with cheaper, sensitive, selective and reliable performance in extreme conditions. Several detection techniques like fluorescence spectroscopy [1], optical fiber [2], electrochemical [3], MEMS [4], chemi-resistor [5] and chemi-capacitive [6] are generally employed for gas sensing strategies. In this work, for the first time we have explored the heterojunction combination of highly air stable DPP based PDVT-10 organic semiconductor with rapidly growing tris(keto-hydrozone) based organic compound (TTH-6) on a transistor platform for selective detection of H2S analytes. This novel approach played a significant role in good stability, appreciable sensitivity and selectivity with excellent repeatability at 100 ppb featuring a theoretical detection limit of around 75 ppb.
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