relationships and the mechanisms of the electronic switching behavior of functional polyimides, a new series of diamines containing a pyrrole core with different side groups were designed and synthesized. Three novel, thermally stable and aromatic polyimides (Py6FPIs) containing the as-designed diamines were prepared. They were fabricated into memory devices sandwiched between an Al top electrode and an indium-tin
为了更好地理解功能性聚
酰亚胺的结构-性质关系以及电子转换行为的机理,设计并合成了一系列新的含
吡咯核心不同侧基的二胺。制备了包含设计的二胺的三种新型的热稳定的芳香族聚
酰亚胺(Py6F
PI)。通过旋涂将它们制成夹在Al顶部电极和
铟锡氧化物(ITO)底部电极之间的存储器件。聚
酰亚胺在
玻璃化转变温度(T g)大约在300°C左右(由
DMA确定)。发现该存储器件显示出非易失性双稳态一次写入多次读取(WORM)存储器特性,具有不同的开关阈值电压和开/关比,具体取决于侧基的电子亲和力。可以在恒定偏置或1.0 V刷新电压脉冲下维持低电导率状态和高电导率状态。借助这些Py6F
PI的分子模拟和电子吸收光谱,可以很好地证明其开关机制和存储效应。 。