Preparation and tunable luminescent characteristics of SiO2 coated ZnO:LiAc nanoparticles.

Abstract

ZnO:LiAc nanopaticles were successfully synthesized though a colloidal-sol technique in nonaqueous solution under ultrasonic irradiation. The luminescent characteristics from blue to red can be tunable by varying [Li]/[Zn] ratios. The possible reason of tunable luminescent characteristics can be attributed to the increase of density of oxygen vacancies caused by Li+ adsorbed in the surface of magic-sized ZnO nanocrystals based on XRD, zeta potential and XPS results. What's more, it is found that SiO2 shell coated on ZnO:LiAc nanoparticles can improve the surface property of ZnO nanoparticles and enhance the PL emission intensity and optical stability. Due to its excellent luminescent characteristic and optical stability, as-prepared SiO2 coated ZnO:LiAc nanoparticles may be a promising candidate for some applications in high-efficiency low-voltage phosphor, solar cells and biological luminescent labels.

Cite this paper

@article{Wang2011PreparationAT, title={Preparation and tunable luminescent characteristics of SiO2 coated ZnO:LiAc nanoparticles.}, author={Zhengjun Wang and Pingle Zhou and Jie Liu and Feijiu Wang and Yinjie Peng and Xibin Yu}, journal={Journal of nanoscience and nanotechnology}, year={2011}, volume={11 8}, pages={6772-8} }