Multi-ratio optical thermometry and energy storage characteristics of Yb3+/Er3+/Tm3+ doped BaNb2O6 transparent glass-ceramics

In order to meet the needs of new materials gradually developing towards miniaturization, integration, and light weight, multifunctional BaNb2O6: Yb3+/Er3+/Tm3+ transparent glass-ceramics were successfully prepared by melt quenching and controllable crystallization. Its structure, luminescence, and energy transmission were studied. Using the opposite temperature dependence of the Tm3+ emission band and the corresponding large energy level gap, a maximum relative sensitivity of 2.3% K–1 based on thermal coupling levels (TCLs) is obtained in a wide temperature range (298–673 K). The multi-ratio optical thermometry based on TCLs and non-TCLs is successfully realized by using the different emission bands of double emission centers, which makes it possible for self-reference optical temperature measurement modes. In addition, the transparent glass-ceramic exhibits excellent electrical properties under 700 kV cm–1 electric field: high discharge energy density (Wd = 0.99 J cm–3), huge instantaneous power density (225.3 MW cm–3), and ultra-fast discharge rate (T0.9 ≤ 15.8 ns). The prepared glass-ceramic is expected to be a new type of lead-free multifunctional photoelectric material for temperature sensors and transparent electronic devices.