Thermal enhancing photoluminescence intensities of Eu3+ doped Lu2(MoO4)3

Thermal quenching is a normal phenomenon in the luminescent materials. In the Eu 3+ doped orthorhombic phase of Lu 2 (MoO 4 ) 3 synthesized by a solid-state reaction method, thermal quenching phenomenon was firstly observed, then thermal enhancing photoluminescence (PL) intensities were recorded with the measuring temperature increasing from 50 °C to 300 °C. Based on the negative thermal expansion (NTE) of the Lu 2 (MoO 4 ) 3 lattice confirmed by in situ high temperature X-ray diffraction (XRD) patterns and the sensitive of the Eu 3+ , the enhancing PL intensities were owned to the variation of the local crystal field at high temperatures. The research is meaningful to conquer the thermal quenching phenomenon in phosphors. PL emission spectra of Eu 3+ doped Lu 2 (MoO 4 ) 3 recorded at 50 °C and 250 °C. Insets are the temperature dependent integrated emission intensities and phosphor pictures captured under 277 nm light. • Eu 3+ doped orthorhombic phase of Lu 2 (MoO 4 ) 3 were synthesized. • The Lu 2 (MoO 4 ) 3 presents NTE property. • Thermal enhancing PL intensities of Eu 3+ were recorded. • The enhancements were attributed to the variation of the local crystal field. • The enhancements were owned to the sensitivity of the Eu 3+ .