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Synthesis and Property of N2O3/CuO Heterojunction Nanomaterials

Author: GaoLiang
Tutor: ZhangMing
School: Jilin University
Course: Condensed Matter Physics
Keywords: Electrodepositon annealing In2O3/CuO Heterojunction electrical properties
CLC: TB383
Type: Master's thesis
Year: 2013
Downloads: 42
Quote: 0
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Abstract


Heterojunction is an important concept in semiconductor science, andsupposed to a new field of materials science. The practical application ofheterojunction has dramatic breakthroughs. The wide band gap semiconductor makea emitter in the heterogeneous transistor, getting a higher injection ratio andpresenting a higher magnification. For the photovoltaic effect, the spread of thecarrier movement between p-n unit can form the inner electric field in the interface.The photogenerated electron-hole pairs are separated effectively by the innerelectric field, which make the photovoltaic activity and photocatalytic activityenhanced. For gas-sensitivity, the improvement of selectivity and sensitivity ofheterojunction are widely used to the gas sensitive sensors,etc. In recent years,nanoscience and technology has made breakthrough progress. Meanwhile, thecombination of nanotechnology and semiconductor materials has been increasinglyclosed. The nano heterojunction materials with a series of physical and chemicalproperties have a comprehensive research significance and application value.As is well-known, one of the advantages of electrochemical depositiontechnology is able to prepare the rules of nanomaterials without template. In thispaper, In2O3/CuO heterojunction nanostructure array was prepared viaelectrodeposition combining with annealing method， and we researched thestructure and property of materials. The electrodeposition mechanism and impactfactors that include potential, electrolyte, pH were studied in this paper. Themacroscopic and microscopic structure have been characterized by field emission scanning electron microscopy, transmission electron microscopy, and X-rayphotoelectron emission microscopy, and determined factors that affectappearance,structure and scale. We analyzed the growth mechanism of thesediment.The large scale area In2O3nanostructure materials and In2O3/CuOheterojunction nanostructure array with a series of special physical and chemicalproperties were synthesized. For the electrical properties, we measured theconductivity under different temperature and irradiation. For the sensitivity of gases,we obtained high sensitivity and selectivity while the ordered arrays were workedunder H2、H2S、NH3, and we explained the phenomenon as follows.

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