Synthesis And Photoelectric Properties Of One Dimensional Telluride Nanomaterials

One-dimensional nanomaterials have some unusual properties due to the quantum effect,which result in a wide range of applications,such as photovoltaics,medical technology,flexible electronics,and catalysis.One-dimensional telluride nanomaterials play a very important role.In recent years,there has been a growing number of methods for synthesizing one-dimensional telluride nanomaterials:hydrothermal/solvothermal,electrospinning,chemical vapor deposition,wetting-chemical and so on.Template directed method based on chemical transformation process is very simple and resultful.As we all known,one-dimensional tellurium nanostructures are exactly good choice for the templates.Based on this,we synthesized two different one-dimensional telluride nanomaterials and completed their photoelectric performance tests.The detail can be summarized as follows:1.We developed a method for synthesis of tin telluride nanorod and tin telluride-based binary metal telluride nanorod.First,we obtain tellurium nanorods in ethylene glycol solution,and then adding tin precursor to get tin telluride nanorods;or adding tin source and another metal source at the same time,we finally get three kinds of binary metal telluride nanorods.We further explored its formation mechanism and the influence of various factors on the morphology of the final product by adjusting the parameters such as temperature and time.2.We prepared indium sesquitelluride nanowires by hydrothermal process at the first time.Based on the tellurium nanowires synthesized in our laboratory,which react with the reduced indium atoms in the presence of hypophosphorous acid to prepared the target product.As the diameter of indium sesquitelluride nanowire depends on the templates,so a series of tellurium namowires with different diameters can also be synthesized,the process of the reaction can be observed by controlling the reaction time.Finally,there is a critical value for the volume of hypophosphorous acid,so that it can not only ensure the tellurium nanowires are not oxidized,but also not influence the nanostructure of the final product.3.The above-mentioned two kinds of one-dimensional telluride nanomaterials are assembled into a film by Langmuir-Blodgett technology.Then we built a photodetector with the assembled thin film to investigate its photoelectric performance.We found that the photodetector based on indium sesquitelluride nanowires has better performance,which can respond from the ultraviolet to near-infrared spectrum.And its photoresponding time is short than 0.06s,revealing their potential application prospects for optoelectronic devices.