Improved temperature sensing performance based on Stark sublevels of Er3+/Yb3+ co-doped tungstate-molybdate up-conversion phosphors
Source abstract
Abstract
Abstract Herein, a new up-conversion temperature sensor of LiCaLa(W0.1Mo0.9O4)3:0.04 Er3+/0.1Yb3+ phosphors that exhibit strong luminescence intensity, improved and good repeatable temperature sensing performance and stability, was reported for the first time. All samples show typical tetragonal scheelite structures and exhibit typical up-conversion luminescence. Three distinct emission bands correspond to two strong green (2H11/2/4S3/2 → 4I15/2) and a weak red (4F9/2 → 4I15/2) bands, respectively. WO42− and MoO42− with similar properties can be replaced with each other to improve the crystal field and ultimately improve the luminescence efficiency. Interestingly, the fluorescence intensity ratios of the two sublevels (4S3/2(1) and 4S3/2(2)) and 2H11/2 increase with the increase of temperature, indicating the improvement of temperature sensing performance. The SA-max are 0.0134 K-1 and 0.0104 K-1, and SR-max are 0.0434 K-1 and 0.0548 K-1 for 2H11/2/4S3/2(1) and 2H11/2/4S3/2(2), respectively. Therefore, the tungstate-molybdate up-conversion luminescence materials has a potential application prospect of optical temperature sensor.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Microwave Dielectric Ceramics Synthesis · Perovskite Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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