Giant topological luminophor with high-intensity luminescent performance

Abstract Improving the luminescent intensity and reducing the critical voltage of rare-earth-doped phosphor materials has long been suffered from a significant technical requirement and is a scientific problem. Although luminescent intensity can be improved to some extent by nanocomposite method like coating precious metals on the surface of the material or providing a porous structure, the improvement in luminescent performance is still unsatisfactory. Inspired by the structure and performance of metamaterials and laser resonator, a fundamental model of giant topological luminophor Y2O3:Eu3++Octadecylamine(ODA)+Dodecylamine(DDA)+Ag with a gradient porous structure was designed and synthesized following the Y2O3:Eu3++Ag topological luminophor to realize a sharply enhance luminescent performance of this nanocomposite. Experiment results and theoretical calculation indicated that the luminescence performance of giant topological luminophor Y2O3:Eu3++ODA+DDA+Ag increased by approximately 1400% compared with that of Y2O3:Eu3+ phosphors under the same conditions and internal quantum yield is 116% while the critical voltage was reduced by 100% as well as the stability is also improved greatly, under the synergy mechanism of Ag topological structures and the gradient porous which composed of differently sized pores. This giant topological luminophor which improves the luminescent performance via the synergistic mechanism of surface micro/nano structures provides a new thought and approach for designing and synthesizing of high-performance rare-earth-doped nanocomposites phosphors.