Highly sensitive up-conversion optical thermometry based on Yb 3+ -Er 3+ co-doped NaLa(MoO 4 ) 2 green phosphors
Source abstract
Abstract
Abstract Pursuing highly sensitive thermometry is a permanent goal in recent scientific research, which can be achieved through Fluorescence intensity ratio (FIR) technique due to its fast response, excellent accuracy, high spatial resolution and tunable size. Herein, highly sensitive micro-thermometers based on FIR of the thermal coupled levels (TCLs) 2H11/2/4S3/2 → 4I15/2 from Er3+ in phosphors NaLa(MoO4)2: Yb3+/Er3+ up-conversion (UC) were developed, which emits dazzling green light with the excitation of 980 nm laser and its UC spectra consisted of intense green bands peaked at 530 and 552 nm and a negligible 658 nm red emission (4F9/2 → 4I15/2), respectively. The maximum absolute sensitivity approached to 0.023 K-1 at 490 K through assessing FIR based on thermo-responsive green emissions. Results suggest the present green-emitting phosphors have great potential to serve as UC thermometers with high and stable sensitivity, which greatly meet the growing demand for sensing applications.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Optical properties and cooling technologies in crystalline materials · Solid State Laser Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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