An optical temperature sensor based on infrared-to-visible upconversion emission in Er3+/Yb3+ co-doped Bi3TiNbO 9 (BTN) ceramics is reported. The fluorescence intensity ratio of the green upconversion photoluminescence (UC-PL) around 524 nm and 545 nm depends on temperature. The operating temperature range and the maximum sensitivity of Er3+/Yb3+ co-doped Bi3TiNbO9 ceramics are 123-693 K and 0.0032 K-1, respectively. BTN:Er 3+/Yb3+ ceramic has good thermal, physical and chemical stability, great UC-PL intensity and low cost fabrication. The results imply that Er3+/Yb3+ co-doped Bi3TiNbO9 ceramic is promising for applications in wide-temperature-range sensors.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)