The effect of temperature on the mechanism of photoluminescence from plasma-nucleated, nitrogenated carbon nanotips

Wang, B.B., Cheng, Q.J., Wang, L.H., Zheng, K., & Ostrikov, K. (2012) The effect of temperature on the mechanism of photoluminescence from plasma-nucleated, nitrogenated carbon nanotips. Carbon, 50(10), pp. 3561-3571.

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Nitrogenated carbon nanotips (NCNTPs) have been synthesized using customized plasma-enhanced hot filament chemical vapor deposition. The morphological, structural, and photoluminescent properties of the NCNTPs are investigated using scanning and transmission electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, and photoluminescence spectroscopy. The photoluminescence measurements show that the NCNTPs predominantly emit a green band at room temperature while strong blue emission is generated at 77 K. It is shown that these very different emission behaviors are related to the change of the optical band-gap and the concentration of the paramagnetic defects of the carbon nanotips. The studies shed light on the controversies on the photoluminescence mechanisms of carbon-based amorphous films measured at different temperatures. The relevance of the results to the use of nitrogenated carbon nanotips in light-emitting optoelectronic devices is discussed.

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ID Code: 73618
Item Type: Journal Article
Refereed: Yes
DOI: 10.1016/j.carbon.2012.03.028
ISSN: 0008-6223
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 09 Jul 2014 03:04
Last Modified: 10 Jul 2014 04:25

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