RT - Journal Article T1 - Investigation of excitonic and photoluminescence properties of ZnO nanoparticles JF - opsi YR - 2015 JO - opsi VO - 21 IS - 0 UR - http://opsi.ir/article-1-473-en.html SP - 265 EP - 268 K1 - Photoluminescence spectrum K1 - Laser ablation K1 - ZnO nanoparticles AB - Zinc oxide nanoparticles were synthesized using pulsed laser ablation of Zn metal plate in deionized water without using surfactant. In this paper, the effects of laser pulse energy and wavelength on the properties of ZnO nanoparticles have been investigated. Transmission electron microscopy analysis confirmed that the size distribution of ZnO nanoparticles is decreased with increasing the laser pulse energy. The room temperature photoluminescence spectra of ZnO nanoparticles show intense violet emission along with the emission in blue and green band. The excellent UV emission indicates that the ZnO nanostructure have a low defect concentration. LA eng UL http://opsi.ir/article-1-473-en.html M3 ER -