Effect of Sr²⁺ ions on the structure, up-conversion emission and thermal sensing of Er³⁺, Yb³⁺ co-doped double perovskite Ba_(2−x)Sr_xMgWO₆ phosphors

Abstract

To investigate the effect of different phase on the optical performance was crucial for the thermal sensing phosphor material. Ba(2-x)SrxMgWO6:Er3+, Yb3+, K+ double perovskite phosphors were successfully prepared using a...

Effect of A-Cation Radius on the Structure, Luminescence, and Temperature Sensing of Double Perovskites A2MgWO6 Doped with Dy3+ (A = Ca, Sr, Ba)

“…11 More importantly, a phase transition in Ba (2d − x) Sr x MgWO 6 :Er,Yb resulted in an improvement in the maximum relative sensitivity of the thermometer, increasing from 0.8%/K to 0.9%/K, respectively. 11 While Ca 2 MgWO 6 (CMW) has been studied over the past few years, the main focus has been on ceramic fabrication 20,21 and optical thermometry based on the up-conversion luminescence of Er 3+ and Yb 3+22 . Surprisingly, the luminescent properties of rare-earth-ion-activated −Sr 2 MgWO 6 (SMW) remain unknown.…”

“…In an attempt to enhance the sensitivity of optical thermometers, the effects of morphology, site-occupation preference, dopant concentration, band gap engineering, codopants, − and synthesis methods on thermometric parameters have been investigated. Particularly, a structure change resulting from cation substitution has been demonstrated as an effective way to tune the temperature sensing performance …”

“…Furthermore, substituting Sr for Ba in BMW caused a blueshift in both excitation and emission spectra, along with a structural change from cubic to tetragonal . More importantly, a phase transition in Ba (2 – x ) Sr x MgWO 6 :Er,Yb resulted in an improvement in the maximum relative sensitivity of the thermometer, increasing from 0.8%/K to 0.9%/K, respectively . While Ca 2 MgWO 6 (CMW) has been studied over the past few years, the main focus has been on ceramic fabrication , and optical thermometry based on the up-conversion luminescence of Er 3+ and Yb 3+22 .…”

“…Particularly, a structure change resulting from cation substitution has been demonstrated as an effective way to tune the temperature sensing performance. 11 Double perovskite compounds (A 2−x A x ′BB′O 6 ) are among the most intensely studied materials by virtue of their unique chemical and physical properties, as well as their diverse applications stemming from their structural flexibility. The crystal structure of double perovskites can be intentionally regulated by a cation substitution.…”

“…Leveraging the simultaneous emission of [WO 6 ] and the dopant, BMW-doped lanthanides have been widely investigated for white-light emission and self-reference optical thermometers . Furthermore, substituting Sr for Ba in BMW caused a blueshift in both excitation and emission spectra, along with a structural change from cubic to tetragonal . More importantly, a phase transition in Ba (2 – x ) Sr x MgWO 6 :Er,Yb resulted in an improvement in the maximum relative sensitivity of the thermometer, increasing from 0.8%/K to 0.9%/K, respectively .…”