Formation of Porous Structures in Conjugated Polymer Films through Spontaneous Phase Separation and Their Application to NO<sub>2 </sub>Gas Sensor
발표자
()
초록
내용
Porous conjugated polymer (CP) films can be fabricated through a phase separation method, which involves mixing CP with auxiliary components that promote phase separation during film formation. This study presents a systematic approach to create these porous films by designing model compounds and calculating solubility distances using Hansen solubility parameters. It was found that as the difference in solubility parameters between the CP matrix and auxiliary components increases, the resulting pore size also increases. We investigated the application of these porous CP films as platforms for field-effect transistor (FET) type NO2 gas sensors. Porous structure significantly enhances both detection sensitivity and speed. Additionally, the quantitative analysis of the response-recovery trend of the FET sensor using the Langmuir isotherm suggests that the response speed can be improved by more than 2.5 times with a 50-fold increase in NO2 sensitivity compared with pristine CP.