However, the PL spectrum of the latter shows three obvious ultraviolet (UV) peaks around 375 nm (3.32eV), 385 nm (3.22eV) and 395 nm (3.13eV), besides one wide blue band near 496 nm (2.5eV).

• 而后者除了在496nm(2.；5eV)有一个宽的蓝光带外；在375nm(3