一种有机薄膜器件的制备及电存储特性

研究了一种金属/有机物/金属夹层结构有机薄膜器件的可逆电双稳特性.器件的阳极和阴极分别为真空热蒸发沉积的Ag和Al薄膜,中间介质层为真空热蒸发沉积的2-(hexahydropyrimidin-2-ylidene)-malononitrile(HPYM)有机薄膜.器件起始状态为非导通态,在大气环境下,可用正、反向电场进行信号的写入和擦除,表现为极性记忆特性.通过自然氧化的方法在底电极Al表面形成一层Al2O3薄膜层后,可使器件在不同的正向电压脉冲作用下达到不同的导电态,具有一定的多重态存储特性.同时,研究了不同的电极组合对器件电性能的影响,并通过紫外-可见吸收光谱以及喇曼光谱对器件界面进行表征.

Fabrication and Memory Characteristics of a New Organic Thin Film Device

The reversible electrical bistability of a new organic thin film device with a metal/organic/metal sandwich structure is investigated.The anode and cathode metals of the device are Ag and Al,respectively,and were fabricated by vacuum evaporation.The middle medium is 2-(hexahydropyrimidin-2-ylidene)-malononitrile (HPYM).The device,which has polar memory characteristics,can be written from a low-conductance state to a high-conductance state by a voltage pulse and can be erased by a reverse voltage.The device with a thin Al2O3 layer between base metal Al and HPYM can produce different high-conductance states through the application of different positive voltages,resulting in multilevel memory capability.The effect of different electrode combinations on conductance switching devices is studied and UV-Vis absorption spectra and Raman spectra are used to obtain information on the interfaces of the devices.