Multifunctional broad-band excited Eu 3+-activated fluorescent materials for potential warm white light-emitting diodes (w-LEDs) and temperature sensor applications

摘要

Graphical abstractThe crystal structure of Lu2MoO6compound and the emission spectrum of blending three blue-emitting BaMgAl10O17:Eu2+, green-emitting (Sr, Ba)SiO4:Eu2+, and red-emitting Lu1.9MoO6:0.1Eu3+phosphors under 365?nm excitation.Display OmittedHighlights?Multifunctional broad-band excited Eu3+-activated fluorescent materials were prepared.?Lu2MoO6:Eu3+can be effectively excited at charge transfer band.?Lu2MoO6:Eu3+is a promising red-emitting phosphor for white-LEDs.?The emission intensities and chromaticity coordinates are sensitive to the temperature.AbstractDiscovery of novel multifunctional fluorescent materials are of great concern to the development of disciplinary crossing and integration. In this work, we prepared a broad-band Eu3+-activated Lu2MoO6multifunctional material for potential warm white light-emitting diodes (w-LEDs) and temperature sensor applications. Lu1.9MoO6:0.1Eu3+phosphor was synthesized by high-temperature solid-state reaction method, and the structure characterization was investigated for the first time. The excitation spectrum of this phosphor exhibits the intense broad band ranging from 250?nm to 440?nm assigned to the O2?-Mo6+charge transfer band (CTB) transition, and a strong red emission centered at 610?nm corresponding to the5D0?→?7F2transition of Eu3+ions were detected under 365?nm excitation. Importantly, warm white light composite material was hybridized via blending commercial green, blue and the present red phosphors, which under 365?nm excitation exhibited a high color rendering index (CRI) of 78 at a correlated color temperature of 4271?K with CIE coordinates of x?=?0.351, y?=?0.308. Furthermore, a strong temperature sensi