Research On Self-assembled Mg System-based Organic Field Effect Transistor Memory

Increasing data traffic and rapid iteration of data storage technology have put forward an urgent need for the improvement of storage device performance.At present,the high-density integration of semiconductor memory is close to the physical limit,and it will be hard to accomplish the means of increasing the storage capacity by reducing the size of the device for a long time.In the face of increasing storage requirements and the unsustainable contradiction of the miniaturization of semiconductor devices,it is undoubtedly an excellent solution to use organic materials with excellent performance and low price to improve the performance of the device on the basis of the original size.As a basic and important electronic component,organic field-effect transistor memory can realize storage,and can be non-volatile through regulation.It has quickly become a research hotspot and has made many achievements.However,its storage capacity as well as storage stability,there is still much room for improvement.In this paper,octadecyltrichlorosilane(OTCS)is used as the storage medium.Through the improvement of preparation methods,such as doping and lamination,a charge-trapping layer with special surface morphology is constructed,and the organic field effect with excellent performance is prepared.The main research contents of transistor memory are as follows:1.Using OTCS self-assembly to prepare a monolayer,as a charge trapping layer,for the preparation of memory,and through the adjustment of annealing,humidity,concentration and other parameters,the performance of the device can be adjusted.The study found that the device with a monolayer as the charge trapping layer exhibits bipolar storage capability,and the storage window can reach to 25 V.2.Using polymer PS and PMMA to mix and self-assemble the OTCS self-assembly solution to obtain a thin film with a nano-pillar array morphology,and the device has the capability of bipolar storage.Doping the OTCS solution and the PS solution in different volume ratios can control nanopillar arrays of different densities,and the corresponding device performance will also change accordingly.By comparison,it can be roughly concluded that a regular and orderly nano-array structure helps to improve the storage performance and storage stability of the device.3.On the self-assembled monomolecular layer,a thin film of polymer or semiconductor material can be superimposed by spin coating to control a nano-array film with holes or columns.Although the preparation of the upper polymer/semiconductor film will affect the order of the lower OTCS self-assembled film to a certain extent,there is no significant impact on the storage window of the device,which further verifies that the ordered nano-array structure is beneficial to improve the storage performance of the device.