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

Preparation and Photoluminescent Properties of Tb3+-Doped Lu2W3O12 and Lu2Mo3O12 Green Phosphors

“…The intensities of Tb 3+ 4f-4f transitions always decreased with the temperature increasing from 50 • C to 300 • C. Yet, the intensity of the CTB transition decreased with the temperature increasing to 150 • C. When the temperature increased further, the CTB and the Tb 3+ 4f-5d transitions increased suddenly at about 170 • C and were hardly unchanged, even when the temperature was increased to 300 • C. Furthermore, the peak wavelength of the 5 D 4 → 7 F 5 transition varied from 546 nm to 552 nm with the measuring temperature increasing. Similar phenomena have been reported in Eu 3+ -doped Lu 2 (MoO 4 ) 3 [22,23]. The enhancing luminescence of Eu 3+ in Lu…”

“…When the up-conversion materials are integrated into biological sensors or optoelectronic devices, the thermally enhanced up-conversion luminescence can provide enhanced detection sensitivities and improved energy conversion efficiencies. Enhanced Eu 3+ emissions were also reported in Lu 2 (MoO 4 ) 3 phosphors [22,23]. Above 450 K, the Lu 2 (MoO 4 ) 3 shows a very intense NTE phenomenon [24].…”

“…The Tb 3+ -doped and undoped Lu 2 W 3 O 12 and Lu 2 Mo 3 O 12 materials were prepared through a solid-state reaction method as reported [22,23]. In a typical procedure, for the preparation of 10 mmol of 5 mol% Tb 3+ -doped Lu 2 W 3 O 12 , 9.5 mmol of Lu 2 O 3 , 0.25 mmol of Tb 4 O 7 , and 30 mmol of WO 3 were weighed and ground thoroughly, placed into a corundum crucible, and calcined at 1000 • C for 4 h in a muffle furnace with some carbon powder in the muffle furnace.…”

Novel Red-Emitting Eu3+-Doped Y2(WxMo1−xO4)3 Phosphor with High Conversion Efficiency for Lighting and Display Applications

“…The phenomenon of temperature-dependent changes in the intensity of phosphor luminescence is a common occurrence in many industries [ 50 , 51 ]. It is widely accepted that the quenching limit for phosphor materials is reached when the luminescence intensity decreases to 80% of its value at room temperature with an increase in temperature.…”

Simultaneously tuning the luminescent color and realizing an optical temperature sensor by negative thermal expansion in Sc2(WO4)3:Tb/Eu phosphors

“…[18][19][20][21][22][23][24] This performance implied the potential to control the thermal quenching behavior of downshifting (DS) luminescent materials by selecting NTE materials and suitable doped-lanthanide ions. For the reported DS luminescent materials with NTE characteristics, the absolute majority of them are single lanthanide ion-doped, such as Sc 2 (MoO 4 ) 3 :Eu 3+ and Lu 2 (MoO 4 ) 3 :Eu 3+ , 25,26 and they also exhibit anti-thermal quenching behavior. However, the limitation of using a single lanthanide ion is that it restricts emission tunability and makes it challenging to exploit different thermal quenching behaviors for highly sensitive temperature sensing.…”