Improving resistive switching characteristics of polyimide-based volatile memory devices by introducing triphenylamine branched structures
作者：Ye Tian, Ying Song, Hongyan Yao, Huaxuan Yu, Haiwei Tan, Ningning Song, Kaixiang Shi, Bo Zhang, Shiy
關(guān)鍵字：Hyperbranched polyimide, Memory materials
論文來源：期刊
具體來源：Dyes and Pigments
發(fā)表時(shí)間：2018年
Two novel solution-processable polyimide (PI-6FDA) and co-polyimide (CoPI-6FDA), with triphenylamine(TPA)-derived structure as electron donor units and trifluoromethyl-containing phthalimide as electron acceptorunits, were designed and synthesized for polymer memory device application. The TPA branched structure wasintroduced into the CoPI-6FDA to modify the performance of the polymer memory devices. Compared with PI-6FDA, CoPI-6FDA based memory devices exhibit better memory performance in lower threshold voltage of?3.1 V, higher ON/OFF current ratios of 105, and better operation stability and charge transfer complex sta-bility. The effect of TPA branched structures on memory performance has been further explored by optoelec-tronic measurements and theoretical calculation. Moreover, the optical and electrochemical measurements re-veal the charge transfer mechanism of the CoPI-6FDA and PI-6FDA, which is related to the electrical bistability.The introduction of TPA branched structures was proved as a suitable strategy to fabricate the polymer memorydevices with high performance.