Photoluminescent materials,serving as optical probes,constitute a significant medium for reliable re-mote sensing of fundamental state parameters such as temperature and pressure.Herein,we report a novel Mn^(4+)-activ...Photoluminescent materials,serving as optical probes,constitute a significant medium for reliable re-mote sensing of fundamental state parameters such as temperature and pressure.Herein,we report a novel Mn^(4+)-activated perovskite-type La_(3) Mg2 SbO9 phosphor(LMS:Mn^(4+))for bifunctional application in both thermometry and manometry.Upon excitation with 341 nm,LMS:Mn^(4+)(0.7%Mn^(4+))emits a bright narrow-band red light peaking at 705 nm with an FWHM(full width at half maximum)of 32 nm.As a thermometer,when the temperature surpasses 298 K,non-radiative transitions from the ^(2)Eg excited state lead to a sharp decrease in decay lifetimes with increasing temperature.This allows for lifetime-based luminescence thermometry with a relative sensitivity of 2.52%K^(−1) at 391 K.Moreover,LMS:Mn^(4+)was processed into a temperature-sensing coating and its non-contact thermometry functionality was validated.In manometry applications,the LMS:Mn^(4+)probe experiences substantial pressure-dependent redshift with a sensitivity of 1.20 nm GPa^(−1) in the testing range of 9.48 GPa,which is about 3.3 times that of conventional ruby probes.Furthermore,its FWHM consistently remains below 37 nm,which con-tributes to a high reliability of pressure measurements.The above results indicate that the LMS:Mn^(4+)constitutes a promising bifunctional luminescence probe material in thermometry and manometry.展开更多
基金supported by the National Natu-ral Science Foundation of China(Nos.51790494,52271234,and U23A20566)the State Key Laboratory of New Ceramics and Fine Processing Tsinghua University(No.KF202206).
文摘Photoluminescent materials,serving as optical probes,constitute a significant medium for reliable re-mote sensing of fundamental state parameters such as temperature and pressure.Herein,we report a novel Mn^(4+)-activated perovskite-type La_(3) Mg2 SbO9 phosphor(LMS:Mn^(4+))for bifunctional application in both thermometry and manometry.Upon excitation with 341 nm,LMS:Mn^(4+)(0.7%Mn^(4+))emits a bright narrow-band red light peaking at 705 nm with an FWHM(full width at half maximum)of 32 nm.As a thermometer,when the temperature surpasses 298 K,non-radiative transitions from the ^(2)Eg excited state lead to a sharp decrease in decay lifetimes with increasing temperature.This allows for lifetime-based luminescence thermometry with a relative sensitivity of 2.52%K^(−1) at 391 K.Moreover,LMS:Mn^(4+)was processed into a temperature-sensing coating and its non-contact thermometry functionality was validated.In manometry applications,the LMS:Mn^(4+)probe experiences substantial pressure-dependent redshift with a sensitivity of 1.20 nm GPa^(−1) in the testing range of 9.48 GPa,which is about 3.3 times that of conventional ruby probes.Furthermore,its FWHM consistently remains below 37 nm,which con-tributes to a high reliability of pressure measurements.The above results indicate that the LMS:Mn^(4+)constitutes a promising bifunctional luminescence probe material in thermometry and manometry.
