3+-activated La2MoO6 nanoparticles for solid-state lighting and non-contact thermometry]]>

摘要

Graphical abstract EL spectrum of the fabricated green-emitting LED device and sensor sensitivity as a function of temperature. Inset shows the digital images of the fabricated device as well as the schematic diagram for the fabrication of green-emitting LED device. Display Omitted Highlights ? The optimal doping concentration for Er3+ ions in La2MoO6 host lattice was 2mol%. ? A green-emitting LED based on the resultant nanoparticle and NUV chip was fabricated. ? The maximum sensitivity for the synthesized nanoparticle was 0.0097K?1 at 463K. ? The sensitivity of the studied samples was dependent on the dopant concentration. ? The obtained nanoparticles possessed superior water resistance behavior. Abstract Series of Er3+-activated La2MoO6 nanoparticles were prepared by a traditional sol-gel method. Under the excitation of 379nm, the resultant compounds revealed dazzling emissions that can be seen by naked eye. With the increment of Er3+ ion concentration, the emission intensity showed an upward tendency and reached its maximum value when the doping concentration was 2mol%. The critical distance was calculated to be 23.41? and the dipole-dipole took the domination in the concentration quenching mechanism. Furthermore, by means of a fluorescence intensity ratio technique, the temperature sensing performances of the synthesized samples in the temperature range of 303–463K were investigated based on the thermally coupled levels, 2H11