▎ 摘　　要

A series of K2SiF6:0.06Mn(4+)@ GQDs (y mg/mol) (KSF: K2SiF6, GQDs: graphene quantum dots) red-emitting phosphors were prepared with a simple coating method. Experimental results show that the KSF:0.06Mn(4+)@ GQDs (y mg/mol) has broad excitation bands in blue region and strong emission line bands in red region with the strongest peak at similar to 630 nm. Enhanced luminescence intensity and thermal stability induced by GQD coating are observed: (i) the integrated intensity of KSF:0.06Mn(4+)@ GQDs (5mg/mol) is 1.32 times of that of KSF:0.06Mn(4+), (ii) the integrated intensities of KSF:0.06Mn(4+)@ GQDs (5mg/mol) at 120 and 180 degrees C are 1.57 and 1.26 times of that at 25 degrees C. Through temperature-dependent behavior measurement and stability test, it can distinctly learn that KSF:0.06Mn(4+)@GQDs (5 mg/mol) exhibits exceptional thermal stability as well as color stability under LED-operating temperature conditions, which implies that the sample has potential applications for blue light-based warm W-LEDs.