Abstract
We exemplify the Er(NbO3)3 phosphor to demonstrate that the performance of the temperature sensor based on thermal effect of fluorescence intensity ratio (FIR) of 980-nm-upconverted Er3+ green 530 and 550 nm emissions can be improved by using KBr-diluted phosphor. The sensing performance of the diluted phosphor plate was studied as a function of KBr:Er(NbO3)3 molar ratio from 0:1 to 100:1. The results show that the KBr dilution enables to enhance the fluorescence intensity and increase the temperature sensitivity. Meanwhile, the KBr itself does not affect either the Er3+ spectroscopic properties or the FIR value. There is an optimum KBr: Er(NbO3)3 molar ratio within 15:1 and 20:1, for which the 530 (550) nm signal increases by 30% (20%) and the relative sensitivity at the physiological temperature increases by 14%.
| Original language | English |
|---|---|
| Pages (from-to) | 573-575 |
| Number of pages | 3 |
| Journal | Materials Letters |
| Volume | 185 |
| DOIs | |
| State | Published - 15 Dec 2016 |
| Externally published | Yes |
Keywords
- Fluorescence intensity ratio (FIR)
- KBr dilution
- Optical temperature sensor
- Sensing performance
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