High Temperature Hysteresis in Bio-Organic Field-Effect Transistor based on DNA-CTMA as Gate Dielectric

摘要

Recently, DNA-CTMA lipid complex as the environmentally-friendly materials has been investigated extensively in novel functional optical and electronic devices. We have previously reported that the hysteresis mechanism of the nonvolatile transistor memory device in lower temperature region from -150 ~ -20 oC (L. Liang et al. Organic Electronics 28, 2016, 294-298). In this study, the hysteresis mechanism in the high temperature region range from 25 ~ 150 oC has been investigated through studying the temperature dependence of transfer characteristics, X-ray diffraction patterns (XRD), differential scanning calorimetry (DSC) as well as the dielectric performance of DNA-CTMA complex. The result indicates that the dipoles inside the DNA-CTMA stacking crystalline structure contribute to the appearance of hysteresis in bio-OTFT device at the high temperature.