Abstract
A novel non-contact optical thermometer, qualified with high sensitivity and temperature resolution, is urgently needed for temperature measuring of micro devices, moving objects and specific severe environments. Hence, a series of dual-emitting La5Si2BO13:Ce3+,Eu2+ phosphors were synthesized. The two ions show diverse responses with the changing in temperature. The variational emissions of Ce3+ and Eu2+ can be converted to FIR (fluorescence intensity ratio) signals. The maximal absolute sensitivity Sa and relative sensitivity Sr reach up to 0.07526%/K and 3.2241%/K, respectively. It is worthy noting that the Sa and Sr possess the same variation tendency and both have high values in the low temperature region (293–373 K), showing the great temperature measuring property especially in low temperature region. The temperature sensing characteristics are superior to the results of most previous reports. The energy transfer (ET) process is certified to occur from Ce3+ to Eu2+ ions. These studies indicate that La5Si2BO13: Ce3+,Eu2+ phosphor could have a good prospect for optical thermometry.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.