Core-shell-core heterostructural engineering of Y2O3:Eu3+/MCM-41/YVO4:Eu3+ for enhanced red emission and tunable, broadened-band response to excitation

摘要: For the first time, a hierarchical phosphor Y2O3:Eu3+/MCM-41/YVO4:Eu3+, with core–shell-core heterostructure, is presented in this study. Synergistically bridging phosphors Y2O3:Eu3+ (as an inner core) and YVO4:Eu3+ outer by amorphous SiO2, i.e., MCM-41 (with ordered mesoporous channels) leads to generation of heterostructure enhanced red emission tunable, broadened-band response excitation. The novel structure material clarified through various characterization methods including X-ray diffraction analysis, transmission electron microscopy, selected-area N2 adsorption–desorption measurements. Significantly, temperature-dependent fluorescence investigation, it found that our core–shell (Y2O3:Eu3+/MCM-41) exhibits impressive stability against temperature variation (27–227 °C) due protective effect resulting from MCM-41. By contrast, lowered can be noted for (Y2O3:Eu3+/MCM-41/YVO4:Eu3+), especially when higher than 100 °C, owing core (YVO4:Eu3+ nanoparticles) directly exposed heat. Such kind luminescent materials holds substantial promise labeling organisms are vulnerable short-wavelength UV light irradiation. Additionally, potential intelligent systems expected designed on basis mutation as triggered 100 °C.