A Novel Orange-Red Emitting ZnB₄O₇:Eu³⁺ Phosphor with Urchin-Like Nanostructure

Figure 10

PL emission profile of ZnB₄O₇:5 at% Eu calcined at various temperatures for 12 h. Inset shows the PL emission trend of 590 nm, 611 nm, and 695 nm peaks with calcination temperatures.