光/蒸气协同构建交联多孔聚合物复合结构基超稳定高速阻变存储器

Light-/steam-driven polymeric crosslinking with porous multistructure pattern for ultrastable and fast-speed memory

有机阻变存储器由两个电极及夹在其间的阻变聚合物层组成,具有湿法制备和功能可调的优点.然而,该类存储器还存在结构稳定性差、开关速度慢和图案化困难等问题.在本文中,我们利用光/蒸汽协同方法制备了一种具有交联多孔复合结构的非晶态聚合物薄膜,并将其作为阻变活性材料构建了一种具有高稳定性和高读取速度特征的存储阵列.所制备的聚合物二极管表现出非易失性的FLASH存储特性,具有高开关比、长维持时间以及快速信息写入(70 ns)和擦除(845 ns)等特征.令人印象深刻的是,该存储器件能够承受紫外辐射和极端温度等恶劣环境的考验.通过将存储阵列和特定传感器集成,构建了能模拟视觉/热感知和记忆功能的人造感知记忆系统,表明该系统在仿生神经形态电子领域具有巨大的应用潜力.该工作为制备具有高稳定性和高读取速度特征的聚合物存储阵列提供了一种可靠的策略.

Organic memories typically comprise memristive polymer mediums sandwiched between two electrodes,with the advantages of wet manufacturing and modulated function.However,the issues associated with structural instability,low-speed switch,and hard pattern in polymeric memories are the main obstacles towards practical uses.Here,we present an ultrastable and fast-speed memory array that uses amorphous polymer nanofilm with light-/steam-driven crosslinked porous multistructure as memristive materials.The polymer diode shows nonvolatile rewritable flash memory characteristics,with a high ON/OFF ratio,long retention time,and high speeds of set(70 ns)and reset(845 ns)operations.Impressively,the memory cell undergoes harsh conditions in ultraviolet irradiation and extreme temperatures.By rationally integrating the array with target sensors,an artificial sensory memory architecture is constructed to mimic visual/thermal perception and recording,demonstrating great potential for biomimetic neuromorphic electronics.Our results advance a commercial perspective on memristive organics capable of integration patterns and high performance.