采用共沉积技术制备了AgTCNQ薄膜,并进行了红外、紫外光谱表征.利用微电子工艺制备了基于AgTCNQ薄膜的有机双稳态器件.研究发现,Ti/AgTCNQ/Au双稳态器件具有可逆、可重复的开关存储特性.将器件从初始的高阻态转变为低阻态的正向开关阈值电压为3.8~5V,将低阻态转变为高阻态的负向阈值电压仅为-3.5~-4.4V,与通常的CuTCNQ器件相比较小.这种基于AgTCNQ交叉结构的有机双稳态器件可应用于非易失性有机存储器.
The AgTCNQ thin-film was prepared by vacuum vapor co-deposition and characterized by infrared spectral analysis,and then a uniform AgTCNQ (TCNQ-- 7,7,8,8-tetracyanoquinodimethane) thin-film layer was sandwiched in a Ti/AgTCNQ/Ati crossbar structure array as organic bistable devices (OBD).A reversible and reproducible memory switching property,caused by intermolecular charge transfer (CT) in the AgTCNQ thin-film, was observed in the organic bista- ble devices. The positive threshold voltage from the high impedance state to the low impedance was about 3.8-5V, with the reverse phenomenon occurring at a negative voltage of - 3.5- - 4. 4V,lower than that with a CuTCNQ active layer. The crossbar array of OBDs with AgTCNQ is promising for nonvolatile organic memory applications.