“…In recent years, core-shell phosphor materials which maintain the morphology of the cores and the luminescent properties of the shells, have attracted extensive scientific and technological interests because of their ability to fine-tune functionalities [14][15][16][17]. Two types of templates, namely, hard (e.g., silica, metal colloids, and carbon spheres) [18][19][20] and soft templates (e.g., micelles, gas bubbles, vesicles, and emulsion droplets) [21][22][23] have been used to prepare different composite materials.…”