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The Preparations Of Graphene-like Molybdenum Disulfide And Its Research In Optoelectronic Devices

Posted on:2014-02-01Degree:MasterType:Thesis
Country:ChinaCandidate:P TangFull Text:PDF
GTID:2248330395484118Subject:Optics
Abstract/Summary:PDF Full Text Request
Because of the special structure, physical and chemical properties, graphene-like MoS2hasbroad application potential in many fields such as secondary battery, field effect transistor, sensorand so on. However, improving the preparation methods of graphene-like MoS2and the relevantstructures and performances of optoelectronic devices are the key problems to hinder its tradeprocess and industrialization development. This thesis bases on graphene-like MoS2, starts fromimproving the preparation methods, focuses on the applications of OLED (Organic Light-emittingDiode) and memory and optimizes the relevant structures and performances.This thesis reviews the common synthesis methods of graphene-like MoS2, shows severalcharacterization methods of the2D layered structures of MoS2, summarizes UV-vis absorption andphotoluminescent properties of graphene-like MoS2and the related mechanisms. Finally, itsummarizes the applications of graphene-like MoS2in various optoelectronic devices, discusses theapplication principles and research progresses, followed by the summary and outlook for theresearch of this new emerged2D layered nano material.This thesis designs and prepares a series of graphene-like MoS2basing on liquid exfoliationand studies the relation between preparation effects and different quantity of NaOH, power and timesystematically, of which, the ratio of1:1, the power of292.5W and the time of1h are the best para-meters. In addition, the UV-vis absorption spectrum and other common spectrum characterizationmethods prove the successful preparation of graphene-like MoS2.This thesis fabricates OLED without hole injecting layer, OLED with MoO3, OLED with graphene-like MoS2and OLED with MoO3/graphene-like MoS2respectively. Compared to OLEDwithout hole injecting layer, OLED with graphene-like MoS2has better performance so thatgraphene-like MoS2is a promising new green anode modifying material. In addition, this thesissuccessfully tunes the thickness of graphene-like MoS2by changing the viscosity and studies therelation between thickne-ss and the performance of OLED systematically. As a result, the thicknessof graphene-like MoS2with the viscosity of10mg/mL is the best to be used for OLED.This thesis mixes with the common acceptor materials such as C60, PC61BM, PTCDA, BTDand so on basing on graphene-like MoS2respectively. Then, the mixed composites are made as theactive layers of memory devices. As a result, all the memory devices demonstrates good “WORM”(Writh Once Read Many) memory performance with on/off ratio larger than103.
Keywords/Search Tags:Graphene-like MoS2, Preparation, Characterization, Organic light-emitting diode(OLED), Memory
PDF Full Text Request
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