Distinct electronic switching behaviors of triphenylamine-containing polyimide memories with different bottom electrodes

A synthetic polyimide poly[4,4′-bis(4-methloxytriphenylamine)-3,3′-biphenylenehexafluoro-isopropylidenediphthalimide] (MTPA-PI) was designed as a functional material for fabrication of memory devices, and two different switching behaviors were observed in the devices with different bottom electrode materials [indium tin oxide (ITO) or Al]. In an ITO/MTPA-PI/Al device, the memory could be switched on/off with the negative/positive voltage with the ON/OFF current ratios in the order of about 104, while in an Al/MTPA-PI/Al device, it shows different switching behaviors with much higher current ratios (up to 109) as compared with the ITO/MTPA-PI/Al device. The different switching mechanisms based on different bottom electrode devices were also discussed.

[1]  C. Guillén,et al.  Thin-Film Polyimide/Indium Tin Oxide Composites for Photovoltaic Applications , 2007 .

[2]  Peter Mark,et al.  Space‐Charge‐Limited Currents in Organic Crystals , 1962 .

[3]  Donal D. C. Bradley,et al.  Space-charge limited conduction with traps in poly(phenylene vinylene) light emitting diodes , 1997 .

[4]  H. Seggern,et al.  Trap engineering in organic hole transport materials , 2001 .

[5]  Dong Min Kim,et al.  Novel Rewritable, Non‐volatile Memory Devices Based on Thermally and Dimensionally Stable Polyimide Thin Films , 2008 .

[6]  Ramón Compañó.  Trends in nanoelectronics , 2001 .

[7]  Dong Min Kim,et al.  Programmable digital memory devices based on nanoscale thin films of a thermally dimensionally stable polyimide , 2009, Nanotechnology.

[8]  Chunxiang Zhu,et al.  Volatile electrical switching in a functional polyimide containing electron-donor and -acceptor moieties , 2009 .

[9]  Jason D. Monnell,et al.  Conductance Switching in Single Molecules Through Conformational Changes , 2001, Science.

[10]  S. Du,et al.  A triphenylamine-containing donor-acceptor molecule for stable, reversible, ultrahigh density data storage. , 2007, Journal of the American Chemical Society.

[11]  Dongge Ma,et al.  Single-layer organic memory devices based on N,N′-di(naphthalene-l-yl)-N,N′-diphenyl-benzidine , 2005 .

[12]  D. Kwong,et al.  A dynamic random access memory based on a conjugated copolymer containing electron-donor and -acceptor moieties. , 2006, Angewandte Chemie.

[13]  K. Yano,et al.  Stable bit formation in polyimide Langmuir–Blodgett film using an atomic force microscope , 2002 .

[14]  Yan Song,et al.  Synthesis and dynamic random access memory behavior of a functional polyimide. , 2006, Journal of the American Chemical Society.

[15]  Yanlin Song,et al.  A high ON/OFF ratio organic film for photo- and electro-dual-mode recording , 2009 .

[16]  M. Oh-e,et al.  Ultrafast Charge Separation and Recombination Dynamics in a Nanometer Thin Film of Polyimide Observed by Femtosecond Transient Absorption Spectroscopy , 2002 .

[17]  V. I. Berendyaev,et al.  Photoconducting polymer nanocomposites with efficient photogeneration and bipolar transport for optoelectronic applications , 2005 .

[18]  D. Kwong,et al.  Electrical switching and transport in the Si/organic monolayer/Au and Si/organic bilayer/Al devices , 2006 .