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

Figure 3

SEM images of ZnB₄O₇:5 at% Eu phosphors hydrothermally treated at 150°C for 24 h at pH 9 (a, b, c) and solid state sample (d). Inset in (c) shows the typical EDS spectrum.

(a)

(b)

(c)

(d)