Liu Yuzhen, Huang Yunlan, Shi Wanquan, Liu Shixiang, Yao Decheng, Zhang Shuyuan, Han Yiqin, Lu Zhongqian, Wang Dongliang. A STUDY OF BLUE EMISSION FROM NANO SiC POWDERS[J]. Chinese Journal of Luminescence, 1999,20(1): 50-54
Liu Yuzhen, Huang Yunlan, Shi Wanquan, Liu Shixiang, Yao Decheng, Zhang Shuyuan, Han Yiqin, Lu Zhongqian, Wang Dongliang. A STUDY OF BLUE EMISSION FROM NANO SiC POWDERS[J]. Chinese Journal of Luminescence, 1999,20(1): 50-54DOI:
The nanometer SiC powders of 8~10nm were synthesized by CVD at 1100℃. A blue luminescence peaked at 2.61eV (~475nm) were observed from the SiC powders at room temperature. The powders were annealed at 600~1000℃ in dry N
2
atmosphere by the rapid thermal annealing (RTA). The peak intensity of blue luminescent increases as RTA temperature and decreases when the annealing temperature is higher than 900℃. With XRD
IR
TEM
XPS analysis
we concluded that the blue PL emission is caused by oxygen deficiency defects in the SiC/SiO
x
interface.
关键词
纳米SiC粉体蓝色荧光快速热退火(RTA)
Keywords
nanometer SiC powdersblue luminescencerapid thermal annealing(RTA)