Abstract
We have reported the synthesis of porous particles of ZnO by thermal evaporation and transport method on silicon (111) substrates. The products were grown in a single-step catalyst-free process. In order to establish the optimum conditions for the preparation of ZnO porous particles, we performed synthetic studies on various growth temperatures. The morphological, structural and optical properties of the synthesised ZnO particles were characterised by field emission scanning electron microscope (FE-SEM), X-ray diffraction (XRD) and room temperature photoluminescence (RTPL) using a xenon lamp with an excitation wavelength of 325 nm. The photoluminescence spectrum of the sample-I showed stronger visible band emission as compared to others at room temperature. This stronger visible emission in the synthesised porous nanoparticles might be useful as a future UV-excited phosphor for producing bright and broad band visible-light. The change in growth temperature altered the morphological and optical characteristics of the nano- and microspheres.
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