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나노 구조 물리 연구단
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Control of Photoluminescence of Carbon Nanodots via Surface Functionalization using Para-substituted Anilines

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Title
Control of Photoluminescence of Carbon Nanodots via Surface Functionalization using Para-substituted Anilines
Author(s)
Kwon, W; Do, S; Ji-Hee Kim; Mun Seok Jeong; Rhee, SW
Publication Date
2015-07
Journal
SCIENTIFIC REPORTS, v.5, no., pp.12604 -
Publisher
NATURE PUBLISHING GROUP
Abstract
Carbon nanodots (C-dots) are a kind of fluorescent carbon nanomaterials, composed of polyaromatic carbon domains surrounded by amorphous carbon frames, and have attracted a great deal of attention because of their interesting properties. There are still, however, challenges ahead such as blue-biased photoluminescence, spectral broadness, undefined energy gaps and etc. In this report, we chemically modify the surface of C-dots with a series of para-substituted anilines to control their photoluminescence. Our surface functionalization endows our C-dots with new energy levels, exhibiting long-wavelength (up to 650 nm) photoluminescence of very narrow spectral widths. The roles of para-substituted anilines and their substituents in developing such energy levels are thoroughly studied by using transient absorption spectroscopy. We finally demonstrate light-emitting devices exploiting our C-dots as a phosphor, converting UV light to a variety of colors with internal quantum yields of ca. 20%
URI
http://pr.ibs.re.kr/handle/8788114/1735
DOI
10.1038/srep12604
ISSN
2045-2322
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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