Tuning the Electrical Memory Characteristics from Volatile to Nonvolatile by Perylene Imide Composition in Random Copolyimides
Tuning the Electrical Memory Characteristics from Volatile to Nonvolatile by Perylene Imide Composition in Random Copolyimides
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DOI：
10.1021/ma300732m
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发表时间：
2012-05
期刊：
影响因子：
5.5
通讯作者：
Tadanori Kurosawa;Yi-Cang Lai;Tomoya Higashihara;M. Ueda;Cheng‐Liang Liu;Wen‐Chang Chen
中科院分区：
文献类型：
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作者：
Tadanori Kurosawa;Yi-Cang Lai;Tomoya Higashihara;M. Ueda;Cheng‐Liang Liu;Wen‐Chang Chen
设计合成了4,4′-（六氟异丙基）二苯二酸酐（6FDA）、N，N′-双（4-氨基苯基）-3,4,9,10-苝双（二羰基）（PBI）和4,4′-二氨基-4″-甲基三苯胺（AMTPA）不同组成的无规共聚物PI-PBIX，用于电阻开关存储器件。通过改变单体的投料比，PI-PBIX（其中含有PBI的重复单元的摩尔组成X = 0、1、2.5、5和10）通过AMTPA和PBI之间的电荷转移表现出可调节的光学和电子性质。此外，夹在ITO和Al电极之间的PI-PBIX制备的存储器件随着PBI成分的增加，表现出从易失性到非易失性一次读多次（WORM）存储器特性的可调谐电双稳定性。基于密度泛函理论分析，OFF/ON电开关转变主要归因于电荷分离高电导的电荷转移机制。此外，波动性……
Random copolyimides, PI–PBIX, with different compositions of 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA), N,N′-bis(4-aminophenyl)-3,4,9,10-perylenebis(dicarboximide) (PBI), and 4,4′-diamino-4″-methyltriphenylamine (AMTPA) were designed and synthesized for resistive-switching memory device applications. By varying the feeding ratio of monomers, PI–PBIX (where X = 0, 1, 2.5, 5, and 10 for molar composition of repeating units containing PBI) showed tunable optical and electronic properties through the charge transfer between AMTPA and PBI. Also, the memory devices prepared from PI–PBIX sandwiched between ITO and Al electrodes exhibited the tunable electrical bistability from the volatile to nonvolatile write once read many-times (WORM) memory characteristics as the PBI composition increased. The OFF/ON electrical switching transition was mainly attributed to the charge-transfer mechanism for charge-separated high conductance, based on the analysis of density function theory. Also, the volatili...