Key Lab of Special Display Technology, Ministry of Education, National Engineering Lab of Special Display Technology, State Key Lab of Advanced Display Technology, Academy of Opto-Electronic Technology, Hefei University of Technology , Hefei 230009, China.
Key Laboratory of Advanced Functional Materials and Devices, Anhui Province School of Chemistry and Chemical Engineering, Hefei University of Technology , Hefei 230009, China.
ACS Appl Mater Interfaces. 2017 May 3;9(17):14974-14982. doi: 10.1021/acsami.7b01865. Epub 2017 Apr 24.
In this study, we designed and fabricated a high-performance humidity sensor based on a donor-acceptor polymer transistor. To improve its sensing performance, a polymeric semiconductor film with macroporous structure was prepared using a facilitated phase-separation method. The relationship between the sensing performance and the pore size was systematically investigated by testing the humidity-sensing performance. The results suggested that the sensitivity of the sensor was improved with increasing pore size within a certain range. The sensor based on the macroporous film with an average pore size of 154 nm exhibited a sensitivity of 415 and a response time of 0.68 s, as the low relative humidity (RH) changed from 32% RH (9146 ppm) to 69% RH (20 036 ppm). These sensitivity values are better than those obtained by other reported humidity sensors based on organic field-effect transistors.
在这项研究中，我们设计并制造了一种基于供体-受体聚合物晶体管的高性能湿度传感器。为了提高其传感性能，我们采用促进相分离的方法制备了具有大孔结构的聚合物半导体薄膜。通过测试湿度传感性能，系统地研究了传感性能与孔径大小的关系。结果表明，在一定范围内，随着孔径的增大，传感器的灵敏度提高。基于平均孔径为 154nm 的大孔薄膜的传感器在低相对湿度 (RH) 从 32%RH（9146ppm）变化到 69%RH（20036ppm）时，灵敏度为 415，响应时间为 0.68s。这些灵敏度值优于其他基于有机场效应晶体管的报道的湿度传感器所获得的值。
