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Photocurrent Enhancement of CdSe Quantum-Dot Sensitized Solar Cells Incorporating Single-Walled Carbon Nanotubes

Title
Photocurrent Enhancement of CdSe Quantum-Dot Sensitized Solar Cells Incorporating Single-Walled Carbon Nanotubes
Author
이휘건
Keywords
Quantum-Dot Sensitized Solar Cell; Quantum Dot; Single-Walled Carbon Nanotube
Issue Date
2018-02
Publisher
AMER SCIENTIFIC PUBLISHERS
Citation
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v. 18, no. 2, page. 1347-1350
Abstract
We demonstrate quantum-dot sensitized solar cells (QDSSCs) which have colloidal CdSe quantum dots (TOPO-CdSe) as a sensitizer onto mesoporous TiO2 photoanodes. CdS quantum-dot (QD) layer plays a role of buffer layer for direct adsorption of TOPO-CdSe. We incorporate single-walled carbon nanotubes with TiO2 photoanode of our QDSSCs to facilitate efficient charge transfer. Short-circuit current densities (J(sc)) of our QDSSCs are enhanced while other parameters are maintained. Furthermore, we apply inert N-2 pressure onto our sensitized photoanodes and observe 44% of Jsc enhancement with respect to pristine sample. Consequently, light-harvesting efficiency of our QDSSCs are increased. Significant series resistance reduction is observed from electrochemical impedance spectroscopy, indicating better interface contact between TiO2 photoanode and TOPO-CdSe QD sensitizer are achieved.
URI
https://www.ingentaconnect.com/content/asp/jnn/2018/00000018/00000002/art00098https://repository.hanyang.ac.kr/handle/20.500.11754/117622
ISSN
1533-4880; 1533-4899
DOI
10.1166/jnn.2018.14922
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > CHEMISTRY(화학과) > Articles
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