Tunable luminescence and temperature sensing behavior of Tb3+/Eu3+ co-doped borate glasses

Abstract

The luminescent borate glasses co-doped Tb 3? / Eu 3? were successfully synthesized by conventional melting quenching technique. Under 378 nm UV-light excitation, the 542 nm emission intensity of Tb 3? weakened gradually and a shorter decay time was found with increasing the content of Eu 3? concentration, confirming the occurrence of Tb 3? to Eu 3? energy transfer. The luminescent color tunable from pure green to yellow and finally to orange was observed in the Tb 3? /Eu 3? co-doped borate glasses. The fluorescence intensity ratio between the 542 nm of Tb 3? : 5 D 4 ? 7 F 5 transition and 702 nm of Eu 3? : 5 D 0 ? 7 F 4 transition in the luminescent glass was found to be highly temperature-dependent with a good sensitivity of 0.357 % K -1 . Such Tb 3? /Eu 3? co-doped borate glasses may present potential application in solidstate lighting and optical temperature sensors.

Ratiometric Optical Thermometry in Lanthanide-Doped Molybdate Phosphors via Construction of Diverse Charge-Transfer Bands

“…Figure shows the X-ray diffraction (XRD) peaks of KBYMO, KBYMO:0.4Tb 3+ , KBYMO:0.02Eu 3+ , and KBYMO:0.4Tb 3+ ,0.02Eu 3+ . Comparing the diffraction peaks with the standard card of KBaY­(MoO 4 ) 3 compounds provided in ref , no significant impurity peaks and offset peaks were observed in the figure, which shows that doping Tb 3+ and Eu 3+ ions did not cause any fluctuation of crystal structure in the host. Taking into account the principle of ion radius and price-matching, doping ions Tb 3+ (CN = 8, r = 1.04 Å) and Eu 3+ (CN = 8, r = 1.07 Å) randomly replace Y 3+ (CN = 8, r = 1.02 Å) and keep the crystal structure stable.…”

“…Since then, more and more scholars have conducted research on rare earth ion-doped KBaRE­(MoO 4 ) 3 (RE = Gd and Y) phosphors. Wang et al synthesized the KBaRE­(MoO 4 ) 3 (RE = Gd and Y)-doped Nd 3+ phosphor with a high-temperature solid-phase method and measured its crystal parameters, showing that its spatial group is the C 2/ c monoclinic system, proving that other ions can be introduced into this host without significant changes in the ionic radius of the matrix material. , Subsequently, on the basis of this theory, Kai Li proposed a series of KBaY­(MoO 4 ) 3 :Tb 3+ ,Eu 3+ ,Sm 3+ /Dy 3+ ,Eu 3+ phosphors, and their applications in white light-emitting diode (WLED) were explored, , but few people have systematically studied the possibility of this phosphor in FIR temperature measurement, so based on this research, we successfully synthesized KBaY­(MoO 4 ) 3 :Tb 3+ ,Eu 3+ phosphors, in which the temperature-insensitive rare earth ion Eu 3+ is used as a reference signal and Tb 3+ , which has poor thermal quenching capacity, is used as a temperature sensor signal. Using its different thermal response signals, a practical dual-emission strategy was constructed and the sensitivity of temperature measurement is successfully improved.…”

Eu3+‐Doped Phosphor‐in‐Glass: A Route toward Tunable Multicolor Materials for Near‐UV High‐Power Warm‐White LEDs

“…Owing to virtues including a long red‐emitting lifetime, host matrix stability, and good transparency, Eu 3+ ‐doped glass presents a high flexibility for optical devices, such as WLEDs, upconversion materials, sensors, and so on . Most importantly, large solvability of Eu 3+ ions is another useful property, which makes Eu 3+ ‐doped glass become more appropriate for lighting.…”

Enhanced up‐conversion luminescence and optical thermometry characteristics of Er3+/Yb3+ co‐doped Sr10(PO4)6O transparent glass‐ceramics

“…Therefore, it is necessary to explore new glass systems for optical thermometry. Recently, our group has been studying the fluorescence property and optical thermometry of phosphate‐based glass and GCs 15,20‐23 . Through glass composition design and process adjustment, transparent GCs containing oxoapatite type Sr 10 (PO 4 ) 6 O nanocrystals (NCs) were achieved in the phosphate glass.…”

“…Recently, our group has been studying the fluorescence property and optical thermometry of phosphate-based glass and GCs. 15,[20][21][22][23] Through glass composition design and process adjustment, transparent GCs containing oxoapatite type Sr 10 (PO 4 ) 6 O nanocrystals (NCs) were achieved in the phosphate glass. Xia et al reported that the rare-earth-metal oxoapatite was appropriate as a host of luminescent materials owing to its rigid crystal structure, excellent thermal, mechanical, and chemical properties.…”