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Novel semiconducting CdSe quantum dot based electrochemical capacitors

Title
Novel semiconducting CdSe quantum dot based electrochemical capacitors
Author
백운규
Keywords
CdSe; Quantum dots; Supercapacitors
Issue Date
2016-01
Publisher
ELSEVIER SCIENCE BV
Citation
MATERIALS LETTERS, v. 162, Page. 230-234
Abstract
For the first time, we report on novel electrochemical capacitors using semiconducting CdSe quantum dots (QDs) as electrodes. Semiconducting QDs with two colors (red, orange) possessing high quantum yield were deposited on transparent ITO substrates to form electrodes of the electrochemical supercapacitors. The two kinds of QDs demonstrated typical capacitive cyclic voltammetry behavior in 2 M H2SO4 aqueous solution. Red QDs demonstrated higher mass-specific capacitance (over 10-fold) compared to orange QDs. Red QDs exhibited stable cycle stability and low internal resistance. Our study demonstrated semiconductor CdSe QDs can be incorporated to high-performance supercapacitors. These novel electrode materials of QDs can pave new way to QD-based energy storage devices or electrochemical sensors. (C) 2015 Elsevier B.V. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0167577X15306546?via%3Dihubhttp://hdl.handle.net/20.500.11754/31450
ISSN
0167-577X; 1873-4979
DOI
10.1016/j.matlet.2015.10.004
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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