硫脲
三元运算
材料科学
分子
电阻随机存取存储器
Atom(片上系统)
层状结构
纳米技术
电化学
尿素
结晶学
化学物理
电极
光电子学
化学
物理化学
有机化学
复合材料
计算机科学
嵌入式系统
程序设计语言
作者
Xue‐Feng Cheng,Erbo Shi,Xianghui Hou,Shugang Xia,Jinghui He,Qingfeng Xu,Hua Li,Na‐Jun Li,Dongyun Chen,Jianmei Lu
标识
DOI:10.1002/asia.201601317
摘要
Herein, two molecules based on urea and thiourea, which differ by only a single atom, were designed, successfully synthesized, and fabricated into resistive random-access memory devices (RRAM). The urea-based molecule showed binary write-once-read-many (WORM) storage behavior, whereas the thiourea-based molecule demonstrated ternary storage behavior. Atomic-force microscopy (AFM) and X-ray diffraction (XRD) patterns show that both molecules have smooth morphology and ordered layer-by-layer lamellar packing, which is beneficial for charge transportation and, consequently, device performance. Additionally, the optical and electrochemical properties indicate that the thiourea-based molecule has a lower bandgap and may be polarized by trapped charges, thus the formation of a continuous conductive channel and electric switching occurs at lower bias voltage, which results in ternary WORM behavior. This study, together with our previous work on single-atom substitution, may be useful to tune and improve device performance in the future design of organic memory.
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