The Preparation And Optoelectronic Devices Research Based On Graphene-like Molybdenum Disulfide Nanocomposites

In recent years, with the development in researching graphene and other twodimensional layered materials, another new class of two-dimensional layered compounds grapheme-like molybdenum disulfide was given rise to physics, chemistry, materials, electronics and many other area researchers widely attention. Not only its unique microstructure, physical and chemical properties, and adjustable bandgap, grapheme-like molybdenum disulfide but also has a lot of advantages of graphene. Therefore, graphene-like molybdenum disulfide have broad application potential in photoelectric storage, sensors, light-emitting diodes, FETs and other optoelectronic devices. However, the potential applications of grapheme-like molybdenum disulfide to put forward higher requirements in material preparation, and single-function type grapheme-like molybdenum disulfide has been unable to meet today’s needs, so explore preparation in grapheme-like molybdenum disulfide and application of nano-composite materials is particularly important in the field of optoelectronic devices.First, this thesis has taken two different classes prepared graphene-like molybdenum disulfide nanosheets, namely direct liquid ultrasonic method and lithium ion intercalation. Meanwhile, characterization of the structure, size, absorbance and morphology of the graphene-like molybdenum disulfide nanosheet, verifying the stripping effect. While successfully realized the effective method to transfer graphenelike molybdenum disulfide nanosheet from one solvent to another solvent.Second, this thesis study the feasibility of liquid compound with graphene-like molybdenum disulfide and fullerenes in different solvents status. Meanwhile, the material have been characterized. And using the prepared materials as the active layer in memory device. By spin coating and vapor deposition method, the Flash non-volatile storage device based on the graphene-like molybdenum disulfide and fullerenes nanocomposites has been successfully prepared. Device exhibits good storage characteristics, the threshold voltage of 2.2 V, and the switch ratio of about 104, its duration in ON state and OFF states have reached 104 seconds, and the device can be read more than 20 times WERE cycle.Third, this thesis study based on the graphene-like molybdenum disulfide solution of gold nanoparticles with different doping content as a hole transporting layer in light emitting device was prepared by deposited and spin coating manner. And found that the device has the gold nanoparticles can exhibit better brightness and luminous efficiency and explore the lighting mechanism.