Indium Oxide Nano Material Structure, The Study Of Optical Properties

As an important functional semiconductor, it is important to understand the structure、optical properties and the fabrication method. There are four parts in this paper:First, we introduce the fabrication of the three-dimensional nanosheet-based flowerlike microspheres (NBFMs) of In2O3 and the characterization of the sample. The NBFMs is synthesized through the precursor InOOH fabricated through hydrothermal method. The introduction of the SEM、TEM and co-focal micro-photoluminescence system.Second, we study the structural properties of rh-In2O3 NBFMs. We report the experimental study on the temperature-induced phase transition of three-dimensional nanosheet-based flowerlike microspheres (NBFMs) of In2O3. Using InOOH as precursor, rhombohedral-In2O3 NBFMs are fabricated. Temperature-induced phase transition of In2O3 NBFMs from rhombohedral (rh) structure to body-centered cubic (bcc) structure is examined by Raman spectroscopy. The critical phase transition temperature is found to be about 530℃. Potoluminescence (PL) spectra of In2O3 are measured before annealing and after annealing at different temperatures. The PL spectral results provide further evidence for the phase transition, confirming the fabrication of bcc-In2O3 NBFMs via a simple annealing method.Third, we study the optical properties of rh-In2O3 NBFMs. Low temperature and power dependent photoluminescence spectra are taken to understand the optical properties of the three dimensional nano-sheet based flowerlike microspheres of In2O3. Blue-shift or red-shift does not happen for the peak in the lower energy side as the temperature goes down. There is no shift happening in the power dependent Photoluminescence spectra experiment.Fourth, we study the anisotropic properties and optical properties of nanorods.