Luminescence and temperature sensing properties of novel Pr3+, Ho3+ Co-doped KBaGd(Mo/WO4)3 phosphors
Source abstract
Abstract
A series of Pr3+ and Ho3+ singly-doped and co-doped KBaGd(MoO4)3 and KBaGd(WO4)3 phosphors were successfully synthesized via the high-temperature solid-state method. Photoluminescence spectra revealed that under 451 nm excitation, Pr3+ exhibits red emission at 650 nm (3P0→3F2 transition) and Ho3+ shows intense green emission at 544 nm (5S2/5F4→5I8 transition). For co-doped samples, concentration-dependent studies identified optimal doping concentrations of 0.02 for Pr3+ and 0.01 for Ho3+. The optical thermometric performance was evaluated using the fluorescence intensity ratio technique, exploiting distinctly different thermal quenching rates of dual emission bands. Both materials achieved identical maximum absolute sensitivity (9.5% K-1) at 298 K, while the tungstate system exhibited superior relative sensitivity (0.71% K-1) compared to the molybdate (0.44% K-1). The temperature resolution was determined to be 0.931 K. Thermal cycling tests demonstrated excellent measurement repeatability exceeding 96%. These results indicate that Pr3+/Ho3+ co-doped phosphors possess significant potential for high-precision optical temperature sensing applications.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Transition Metal Oxide Nanomaterials · Thermal Expansion and Ionic Conductivity
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (98)
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