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Ultra‐sensitive OTFT‐based NO2 gas sensors implementing a simple, low‐cost UV/ozone (UVO) activation of the TFT gate dielectric layer are fabricated, as discussed in article number 1701706 by Junsheng Yu, Tobin J. Marks, Antonio Facchetti and co‐workers. UVO generates oxygen‐containing functional groups which strongly bind the NO2 molecules, which contributes to limit of detection of ≈400 ppb, and...
A new type of nitrogen dioxide (NO2) gas sensor based on copper phthalocyanine (CuPc) thin film transistors (TFTs) with a simple, low‐cost UV–ozone (UVO)‐treated polymeric gate dielectric is reported here. The NO2 sensitivity of these TFTs with the dielectric surface UVO treatment is ≈400× greater for [NO2] = 30 ppm than for those without UVO treatment. Importantly, the sensitivity is ≈50× greater...
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