Temperature and Pressure Sensing Using an Optical Platform Based on Upconversion Luminescence in NaSrY(MoO₄)₃ Codoped with Er³⁺ and Yb³⁺ Nanophosphors

Abstract

Multifunctional materials are needed for multidimensional stimuli-sensing devices to monitor equipment in complicated working situations. Energy upconverting (UC) nanophosphors doped with rare earth ions are widely studied as materials for optical temperature and pressure sensors working via the control of fluorescence (luminescence) intensity ratio. Nonetheless, most Er3+-doped materials still have limited sensitivity of optical detection. In the present study, we attempted to develop high-sensitivity Er3+-doped sensor nanophosphors based on thermally coupled energy levelsTCLs (Stark components) for temperature and pressure sensing purposes. On the basis of different pairs of TCLs, especially those from the Stark sublevels of 2H11/2 and 4S3/2, the multiple temperature and pressure sensing performances were evaluated. The sensitivities of the pressure and temperature detection modes that are calculated using the selected Stark sublevels are noticeably greater than those based on the traditional TCLs (based on the whole bands). The findings of our study demonstrate a pioneering method for the creation of optically active, multifunctional materials and their integration into optoelectronic devices, specifically for the purpose of serving as remote sensors for low-pressure (vacuum) and -temperature measurements.

Dual-mode optical ratiometric thermometry using Pr3+-doped NaSrGd(MoO4)3 phosphors with tunable sensitivity

“…Erbium-doped materials have been found to have high sensitivity and a broad temperature range, making them suitable for a variety of temperature-sensing applications. 9,10 They have been employed on various hosts. 11–15 On the other hand, single-band ratiometric (SBR) thermometry has recently received considerable attention, as it employs a single optically active center that is excited in two different ways to produce emission signals with opposite temperature dependencies.…”

A novel optical temperature sensor and energy transfer properties based on Tb3+/Sm3+ codoped SrY2(MoO4)4 phosphors

“…5,6 Furthermore, they exhibit sharp emission bands with narrow line widths, long lifetimes, and high quantum yields, which makes them highly sensitive to changes in temperature. [7][8][9] These properties have led to the development of a variety of lanthanide-based temperature sensors, such as luminescent thermometers and thermal imaging probes. 10 Among lanthanide ions, Erbium-doped materials have high sensitivity and a broad temperature range, making them attractive for a wide range of temperature sensing applications.…”