Gas Sensing Performance Enhancement by Chemical and Physical Modification on Organic Thin Film via Ultraviolet-Ozone Treatment
발표자
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초록
내용
Organic sensors are emerging field to replace inorganic sensors due to the limitations. However, in the case of existing organic sensors, reactivity and selectivity with target gases are lower than that of inorganic gas sensors, and in particular, there is a fatal limitation in that they have low charge density and stability. Therefore, we ultimately made the gas react effectively to the channel area by generating the oxidation layer by modifying the surface of the polymer thin film with UV-ozone. We fabricated thin films using Poly(3-hexylthiophene)(P3HT) dissolved in CF and treated UVO for different seconds on the surface of the thin film. This presentation, we investigated how it affects the performance of the sensors. By UVO, the surface of the thin film was oxidized and chain of polymer was cutted off, that resulting in an increase of hydrophilicity and free volume. The oxidation layer and free volume of the thin film increases the gas sensing performance and sensitivity to NO2.