Up-conversion luminescence, temperature sensitive and energy storage performance of lead-free transparent Yb3+/Er3+ co-doped Ba2NaNb5O15 glass-ceramics

In this work, a new type of Yb3+/Er3+ co-doped lead-free glass-ceramics (GCs) containing Ba2NaNb5O15 nanocrystals was synthesized via traditional melt-quenching and controlled crystallization. The research results illustrate that a transparency of GCs can reach 50% at wavelength of 600 nm and the up-conversion (UC) luminous performance of GCs has been improved obviously compared with precursor glass (PG). And the dual-mode temperature measurement was carried out by fluorescence intensity ratio technology. Using thermally/non-thermally coupled energy levels (TCELs/non-TCELs), the maximum absolute sensitivities of Sa-max (TCELs) and Sa-max (non-TCELs) are 0.65% K−1 and 0.68% K−1, and the maximal relative sensitivities of Sr-max (TCELs) and Sr-max (non-TCELs) are 1.19% K−1 and 0.90% K−1, respectively. Furthermore, the discharge energy density (Wd) of 1.53 J cm−3 and the instantaneous discharge power density of 370 MW cm−3 with ultra-fast discharge time of 7 ns are simultaneously achieved in the GCs. These findings reveal the potential applications of new lead-free transparent Yb3+/Er3+ co-doped Ba2NaNb5O15 GCs for optical temperature measurement and energy storage.