Study of Blue Emission from Nano-SiC Powders During Rapid Thermal Annealing

Autor:	Zhong-qian Lu, Shou-hong Tan, Dong-liang Jiang, Yun-lan Huang, Yi-qin Han, Wan-quan Shi, Yu-zhen Liu, Shi-xiang Liu
Rok vydání:	1999
Předmět:	Diffraction Photoluminescence Materials science X-ray photoelectron spectroscopy Transmission electron microscopy Annealing (metallurgy) Nano Analytical chemistry General Physics and Astronomy Infrared spectroscopy Chemical vapor deposition
Zdroj:	Chinese Physics Letters. 16:602-604
ISSN:	1741-3540 0256-307X
Popis:	Nanometric SiC powder was prepared by chemical vapor deposition at 1100°C, and samples were subsequently treated by rapid thermal annealing at 600-1100°C. The intensities of the blue photoluminescence were then measured at room temperature. The peak intensity at 2.56 eV (484 nm) rises with annealing temperature, reaching a value about 9.2 times as high at 800°C, then drops very quickly at 900°C. Based on the results of x-ray diffraction, infrared spectroscopy, x-ray photoelectron spectroscopy and transmission electron microscopy, we conclude that the amounts of the twofold coordinated Si on the surface of the nanometric SiC particles play an important role in the photoluminescence intensity.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::92b3f6d81b73dd8dc0b6125d9fce2394 https://doi.org/10.1088/0256-307x/16/8/021 Zobrazit plný text záznamu