Luminescence and crystallinity enhancement using nano-oxide

作者：Chang Horng Yi^*; Wang Yuh Ruey; Wu Mei Lun; Lin Li Jiaun; Tsai Ling Na; Cheng Syh Yuh

来源：Materials Chemistry and Physics, 2008, 112(2): 607-611.

DOI：10.1016/j.matchemphys.2008.05.092

• SrTiO3 oxides phosphor
• Cathodoluminescence
• Hydrothermal
• Nano-crystallite

The seeded nano-TiO2 particles in the hydrothermal (HT) solution assist phosphor crystallite nucleation and growth, facilitate formation of cubic grain shape, but limit grain growth during post-annealing so as to strongly enhance the cathodoluminescence (CL) intensity. Nano-crystallites of SrTiO3:Pr, Al phosphors approximately 80 nm with specific shape are successfully obtained and red cathodoluminescence is easily excited at low accelerating voltage of I W The obtained phosphors after annealing at 1000 degrees C 1 h(-1) exhibit the highest CL intensity than those obtained under other annealing conditions and those direct-pyrolyzed phosphors as well as mixed-oxide (MO) phosphors having composition similar to hydrothermal ones. The smaller phosphor crystal possesses larger surface and homogeneous activators distribution to facilitate the efficient excitation of low-energy electron bombardment of 1 keV.

• 出版日期2008-12-1