Ultralow pressure sensing and luminescence thermometry based on the emissions of Er³⁺/Yb³⁺ codoped Y₂Mo₄O₁₅ phosphors

Abstract

We present a comprehensive study showcasing the multifunctional capabilities of lanthanide-doped materials as optical sensors for temperature and pressure. Furthermore, we introduce a novel bi-modal sensing approach using these materials.

Multifunctional Optical Sensing with Lanthanide-Doped Upconverting Nanomaterials: Improving Detection Performance of Temperature and Pressure in the Visible and NIR Ranges

“…However, the data of vacuum sensors are quite restricted for those functioning at low pressure, i.e., around 0.1 mbar. If we compare the S r ( P ) values from the different sensors, our sensor has 121% mbar –1 , which is lower compared to YVO 4 , but higher compared to the YPO 4 sensor, YAlO 3 perovskite-based sensor (microsphere), or NaYF 4 sensors, and molybdate Y 2 Mo 4 O 15 sensors . However, at a pressure of roughly 1 mbar, the produced sensor has S r ( P ) 10% mbar –1 , which is comparable to those of the vanadate molybdate and phosphate sensors.…”

“…The result obtained from the LIR provides the smallest area increment that can be measured, which in turn gives the uncertainty of pressure measurement. The value of δ P is provided. ,, δ P = 1 S r × δ LIR LIR where δ P is the smallest change that may be measured experimentally and δLIR is the sensor parameter’s resolution limit or relative uncertainty. The resolution limit is determined by the experimental setting as well as the sensor performance.…”

Exploring luminescence quenching mechanisms and temperature sensing capabilities of LiSrYW3O12:Sm3+ phosphors

“…The temperature dependence of FIR of I F / I G2 could be expressed by the Boltzmann's distribution rule as follows (eqn (5)): 40 where the variables A is a constant, Δ E represents the energy gap between different energy levels, k B is Boltzmann constant and T is the absolute temperature. The FIR as function of temperature of I F / I G2 is demonstrated in Fig.…”