Multiband photoluminescence from carbon nanoflakes synthesized by hot filament CVD: towards solid-state white light sources

Wang, B.B., Ostrikov, K., Zheng, K., Wang, L., & Zou, S.S. (2014) Multiband photoluminescence from carbon nanoflakes synthesized by hot filament CVD: towards solid-state white light sources. Journal of Materials Chemistry C, 2(16), pp. 2851-2858.

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Abstract

Carbon nanoflakes (CNFLs) are synthesized on silicon substrates deposited with carbon islands in a methane environment using hot filament chemical vapor deposition. The structure and composition of the CNFLs are studied using field emission scanning electron microscopy, high-resolution transmission electron microscopy, micro-Raman spectroscopy, and X-ray photoelectron spectroscopy. The results indicate that the CNFLs are composed of multilayer graphitic sheets and the area and thickness of CNFs increase with the growth time. The photoluminescence (PL) of CNFLs excited by a 325 nm He-Cd laser exhibits three strong bands centered at 408, 526, and 699 nm, which are related to the chemical radicals terminated on the CNFLs and the associated interband transitions. The PL results indicate that the CNFLs are promising as an advanced nano-carbon material capable of generating white light emission. These outcomes are significant to control the electronic structure of CNFLs and contribute to the development of next-generation solid-state white light emission devices. © 2014 the Partner Organisations.

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ID Code: 73494
Item Type: Journal Article
Refereed: Yes
Additional Information: Funding Details: 11004004, NSFC, National Natural Science Foundation of China
Additional URLs:
DOI: 10.1039/c3tc32568g
ISSN: 2050-7526
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 08 Jul 2014 05:07
Last Modified: 09 Jul 2014 05:04

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