Study On Properties Of Memory Devices Based On Small Molecules With Azo Group

With the dramatically development of big data and cloud services, the requirement for high density data storage has become very urgent. Memory devices based on inorganic silicon materials has developed to the limit. The storage density device has been very difficult to be greatly improved. However, the development of information industry is in urgent need of high density storage material. With the advantages of easy operation, storage devices based on organic materials can make good use of the processing technology. This area has attracted much attention in recent years. This paper focused on the studies of organic memory materials by modification of materials to improve the performance of device, including low turn-on voltage, stability and multi-level storage, as follows:1. The polymer containing the azo and pyridine group was prepared. After being modified by self-assembly method, the materials were fabricated into multilayer storage device, which can realize multi-level memory effect. Compared to the previous method using polymer doped with complexes, this way has the advantages of simple operation, low costs and avoiding the problem of phase separation.2. Two small organic molecules HQBA and HQBM containing azo and quinoline groups were synthesized. We discussed the influence of intermolecular hydrogen bond on the accumulation of molecules and the performance of the film morphology. In addition, by adding the charge transport layer of Mo O3, opening voltage was decreased and ON/OFF current ratio was improved.3. Alumina hydrate films were prepared by solution deposition method and fabricated into memory device. HQBA and aluminum nitrate were dissolved in the solution of ethanol. Through the control of p H, the proper film of alumina hydrate was prepared. The alumina hydrate has multi crystal phase, which might be the origin of bi-stable electrical property.