INVESTIGATION OF OXYGEN-RELATED DEFECTS IN ZnO: GROWING TIME AND Mn CONCENTRATION EFFECTS

Authors : Selma ERAT, Saadet YİLDİRİMCAN

Pages : 68-75

Doi:10.31127/tuje.453593

View : 9 | Download : 5

Publication Date : 2019-04-01

Article Type : Research Paper

Abstract :The optical and photoluminescence properties of ZnO nanocrystals synthesized via hydrothermal method are determined in this study. The effect of growing time insert ignore into journalissuearticles values( 1 h, 6 h, 12 h, 24 h and 36 h ); and Mn concentration insert ignore into journalissuearticles values(5x10 -4 mol, 10x10 -4 , 25x10 -4 mol, 75x10 -4 mol, 100x10 -4 mol, 250x0 -4 mol); on these properties are investigated and presented in detail. Optical properties of the nanocrystals are investigated by using UV-VIS spectrophotometer. The ultraviolet–visible insert ignore into journalissuearticles values(UV-Vis); and photoluminescence insert ignore into journalissuearticles values(PL); spectroscopy techniques are used for optical and photoluminescence properties characterization. Room temperature PL spectra of the ZnO nanopowders show a near band-edge emission insert ignore into journalissuearticles values(peak at 385 nm); and a red light emission insert ignore into journalissuearticles values(peak at 650 nm); for both ZnO synthesized for different growing time and different Mn concentration. The ZnO prepared with 1 h and 12 h includes the lowest oxygen related defects. The ZnO doped with 5x10 -4 mol shows the highest oxygen related defects whereas that of 100x10 -4 mol shows the lowest defects.
Keywords : ZnO, Mn, Photoluminescence Properties, Optical Properties