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

• RE-doped BaNb 2 O 6 transparent glass ceramics (GCs) were fabricated firstly. • Realizing three-mode Up-conversion optical thermometry in the GCs. • The maximum S r-max and S a-max can reach 2.30% K^–1 and 6.71‰ K^–1. • Achieving high W d of 0.99 J cm^–3 and high P d of 225.3 MW cm^–3. • Multifunctional GCs can be used in optical sensing and energy storage fields. In order to meet the needs of new materials gradually developing towards miniaturization, integration, and light weight, multifunctional BaNb 2 O 6 : 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 (W d = 0.99 J cm^–3), huge instantaneous power density (225.3 MW cm^–3), and ultra-fast discharge rate (T 0.9 ≤ 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. [ABSTRACT FROM AUTHOR]