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Defects on the Surface of Ti-Doped MgAl2O4 Nanophosphor
Jaehyuk Lim1,2, Yongseon Kim3, Sungdae Kim4
1Samsung Electronics, 95 Samsung2-ro, Giheung-gu, Yongin, Gyeonggi-do, 446-811, South Korea.
Nanoscale Research Letters
|September 21, 2017
Abstract:
Ti-doped nano MgAl2O4 for white emission was synthesized by combustion method. Extrinsic Schottky defects, Al vacancies and Ti4+ dopant in Al sites, which are considered to be responsible for bluish-white emission, were observed by STEM on the surface of Ti-doped nano MgAl2O4 powder. The stabilities of the Schottky defect associates, (TiAl·-VAl''')'', were demonstrated by DFT calculation. The emission behavior was interpreted with these results.
