In the last decade, lanthanide-doped phosphors have emerged as perspective materials to provide remote optical thermometry based on monitoring various temperature sensitive luminescence parameters. Pr3+-doped materials provide a wide choice of temperature sensing strategies due to the rich energy-level structure. Here, low-doped LuVO4:Pr3+ powder has been successfully demonstrated as a ratiometric thermometer by two independent approaches. The use of crystalline host emission and Pr3+ transitions that originate from different excited levels helps to enhance the reliability and versatility of the proposed optical sensor. The combination of two ratiometric strategies results in a wide temperature sensing range of 98–673 K. The best thermal sensitivity of 2.0 % K−1 and temperature resolution of 0.3 K at room temperature were achieved for the luminescence intensity ratio between Pr3+ transitions. In addition, rough temperature estimation can be done using the CIE chromaticity coordinates.
Original languageEnglish
Article number116351
JournalOptical Materials
Volume157
DOIs
StatePublished - 1 Nov 2024

    Research areas

  • Crystalline host emission, Optical thermometry, Pr3+, luminescence intensity ratio

ID: 126582102