“…The luminescence and thermal stability of double-perovskite compounds are controlled by the degree of crystal structure distortion and abundant [B/B′O 6 ] octahedral structures respectively. 16 Keeping this in mind, researchers attempted to develop a diverse class of double perovskite phosphors like tellurates 17–21 tungstates, 22 molybdates, 23 titanates, 24 and niobite. 25 Tellurate materials exhibit good electro-optical and nonlinear properties, making them ideal for applications in optical fibers, fluorophores, and holographic storage sectors.…”