1College of Physics and Engineering, Qufu Normal University, Qufu 273165 2College of Aeronautical Engineering, Binzhou University, Binzhou 256603 3School of Physics and Optoelectronic Engineering, Ludong University, Yantai 264025
Abstract：ZnS:Mn thin films are grown on GaN substrates by pulsed laser deposition. The structure, morphology and optical properties are investigated by x-ray diffraction, scanning electron microscopy and photoluminescence (PL). The obtained ZnS:Mn thin films are grown in preferred orientation along $\beta$-ZnS (111) direction corresponding to crystalline structure of cubic phase. The deposition temperature has an obvious effect on the structure, surface morphology and optical properties of ZnS:Mn thin films. PL measurements show that there are two emission bands located at 440 nm and 595 nm when the films are deposited at temperatures from 100$^{\circ}\!$C to 500$^{\circ}\!$C. The relative integrated intensity of the blue emission and orange-red emission is determined by the deposition conditions. At the proper deposition temperature of 300$^{\circ}\!$C, the color coordinate is closest to (0.33, 0.33). The ZnS:Mn films on GaN substrates can exhibit white light emission.
2016, Vol. 33 
