SYNTHESIS AND CHARACTERIZATION OF PHOSPHOR MATERIAL ZNAL2O4:TI BY SONOCHEMICAL METHOD

• Main Author: Handayani, Vina
• Format: Final Project
• Language: Indonesia
• Subjects: Kimia
• Online Access: https://digilib.itb.ac.id/gdl/view/33896
• Institution: Institut Teknologi Bandung

Nanosized phosphor material has unique properties in photoluminescence and phosphorescence when it is compared with their bulk material and it is widely used in solid state lighting and optical labeling. Phosphor materials are used for various applications such as plasma and field emission displays, liquid crystal displays (LCDs), cathode ray tubes (CRTs), X-ray detectors and light emitting diodes (LEDs). In this study material phosphor of zinc aluminate, ZnAl2O4:Ti was synthesized by sonochemical method at 60 °C. ZnAl2O4 has wide-band gap at about 3,8 eV, therefore, it has potential application in biological applications for cell labeling and others. In this work, zinc aluminate is doped with a small amount of activator of Ti4+ ion. The titanium ions came from titanium isopropoxide. Zn2+ sources that was used in this study is Zn(NO3)2.6H2O, meanwhile Al3+ source is Al(NO3)3.9H2O. After sonochemical process, zinc aluminate was sintered at 600 °C, while ZnAl2O4:Ti was sintered at 300 °C, 600 °C, 900 °C and 1200 °C for 120 minutes. The samples were characterized by X-Ray Diffraction (XRD) method, Diffuse Reflectance Spectroscopy (DRS) and Photoluminescence (PL) measurements. From these measurements, it can be concluded that ZnAl2O4 is in single phase with band gap of around 3,4 eV and has a crystal size of around 5,27 nm. The photoluminescence measurement show that photoluminescence intensity of ZnAl2O4:Ti increases as sintering temperature increases.