Nonvolatile resistive memory devices based on ferrocene-terminated hyperbranched polyimide derived from different dianhydrides
作者：Haiwei Tan, Huaxuan Yu, Ying Song, Shiyang Zhu, Bo Zhang, Hongyan Yao, Shaowei Guan
关键字：Hyperbranched polyimide, memory device
论文来源：期刊
具体来源：Journal of Polymer Science Part A: Polymer Chemistry, DOI:10.1002/pola.28920
发表时间：2017年
A series of ferrocene-terminated hyperbranched polyimides (HBPI-Fcs) were synthesized from a tetra-amine, bis (4-(3, 5-bis (4-amino-2-(trifluoromethyl) phenoxy) phenoxy) phenyl) methanon, and various dianhydrides, followed by termination with (4-amino) phenyl ferrocene. All the HBPI-Fcs possessed good organo-solubility and high thermal stability. The devices based on HBPI-Fcs exhibited bipolar and nonvolatile write-once-read-many times (WORM) memory performance with various threshold voltages and the same ON/OFF current ratio of 104. Moreover, the devices possessed excellent bistability under a constant bias of -1.00 V during a test period of 104 s. The different charge trapping ability of the electron-accepting moiety endowed the devices with different the threshold voltages. Mechanism analysis showed that the switching behavior was dominated by the charge trapping effect and the charge transfer was well fitted with the space-current-limited-current (SCLC) and ohmic model