Formaldehyde OTFT Sensors Based on Airbrushed Different Ratios of P3HT/ZnO Films

摘要

cqvip:The formaldehyde(HCHO) detecting at room temperature is of great significance.Different ratios of P3HT/ZnO composite films(3:1,1:1,and 1:3) were deposited on the organic thin film transistor(OTFT) by spray-deposition technology,and the electrical properties and HCHO-sensing properties of all the prepared OTFT devices were measured by Keithley 4200-SCS source measurement unit.The results show that the OTFT sensor based on the P3HT/ZnO films with the ratio of 1:1 exhibited the best output and transfer curves.Different changing tendency were observed with the increase of ZnO proportion when exposed to HCHO at room temperature,and the device with the ratio of 1:1 behaved a good response and recovery characteristics.