Elsawy Walaa, Son Myungwoo, Jang Jisu, Kim Myung Jin, Ji Yongsung, Kim Tae-Wook, Ko Heung Cho, Elbarbary Ahmed, Ham Moon-Ho, Lee Jae-Suk
Center for Emerging Electronic Devices and Systems, Research Institute for Solar and Sustainable Energies (RISE), Department of Nanobio Materials and Electronics, School of Materials Science and Engineering, Gwangju Institute of Science & Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju 500-712, Republic of Korea.
Department of Chemistry, Faculty of Science, Tanta University, Tanta 31527, Egypt.
ACS Macro Lett. 2015 Mar 17;4(3):322-326. doi: 10.1021/mz500698p. Epub 2015 Feb 27.
Nonvolatile resistive memory devices based on a new low bandgap donor-acceptor (D-A) conjugated polymer, poly(()-6,6'-bis(2,3-dihydrothieno[3,4-][1,4]dioxine-5-yl)-1,1'-bis(2-octyldodecyl)-[3,3'-biindolinyi-dene]-2,2'-dione) (PIDED), which are fabricated and operated in ambient air, are reported. The D-A conjugated polymer is synthesized from 2,3-dihydrothieno[3,4-][1,4]dioxine and isoindigo as an electron donor and an electron acceptor, respectively, using CH-arylation polymerization. The devices show nonvolatile, unipolar resistive switching behaviors with a high on/off current ratio (∼10), excellent endurance cycles (>200 cycles), and a long retention time (>10 s) in ambient air. These properties remain stable in ambient air over one year, demonstrating that the device performance is significantly unaffected by exposure to air as the isoindigo has strong electron-withdrawing character and the PIDED exhibits a high degree of crystallinity. This study may pave the way for use of practical nonvolatile organic memory devices operating in ambient air.
报道了基于一种新型低带隙供体-受体（D-A）共轭聚合物聚（（）-6,6'-双（2,3-二氢噻吩并[3,4-][1,4]二恶英-5-基）-1,1'-双（2-辛基十二烷基）-[3,3'-联吲哚啉二烯]-2,2'-二酮）（PIDED）的非易失性电阻式存储器件，该器件在环境空气中制备和操作。D-A共轭聚合物由2,3-二氢噻吩并[3,4-][1,4]二恶英和异靛蓝分别作为电子供体和电子受体，采用碳-芳基化聚合反应合成。该器件在环境空气中表现出非易失性、单极电阻切换行为，具有高的开/关电流比（约10）、优异的耐久性循环（>200次循环）和长的保持时间（>10秒）。这些性能在环境空气中超过一年保持稳定，表明由于异靛蓝具有强吸电子特性且PIDED表现出高度结晶性，器件性能不受暴露于空气的显著影响。这项研究可能为在环境空气中运行的实用非易失性有机存储器件的应用铺平道路。
