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Preparation of silver nanowires coated with TiO2 using chemical binder and their applications as photoanodes in dye sensitized solar cell

Title
Preparation of silver nanowires coated with TiO2 using chemical binder and their applications as photoanodes in dye sensitized solar cell
Author
강용수
Keywords
Chemical synthesis; Electron microscopy; Electrochemical properties; Microstructures
Issue Date
2015-11
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, v. 86, Page. 122-130
Abstract
In this study, the core-shell structured Ag@TiO2 wire was prepared for application to dye-sensitized solar cell (DSSC). The Ag nanowire, having an excellent electrical conductivity, was synthesized by using the facile microwave-assisted polyol reduction process. The diameter and length of Ag wires were 40-50 nm and 20-30 mu m, respectively, and the face-centered cubic silver crystal structure was obtained. In the presence of 2-mercaptoethanol as a chemical binder, the entire surface of Ag wire was coated with the TiO2 shell, which has thickness of 20 nm, through solvothermal method. The crystalline structure of TiO2 shell was the anatase phase possessing an advantage to achieve the high efficiency in DSSC. The core-shell structured Ag@TiO2 wire exhibited the high thermal stability. The high conversion efficiency (5.56%) in fabricated device with Ag@TiO2 electrode, which is about 10% higher than reference cell, was achieved by enhancement of short-current density (J(SC)) value. The core-shell structured Ag@TiO2 wire could effectively reduce the charge recombination through the contribution to electron shortcut for improvement in the electron transfer rate and lifetime. (C) 2015 Elsevier Ltd. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S002236971530010X?via%3Dihubhttp://hdl.handle.net/20.500.11754/29023
ISSN
0022-3697; 1879-2553
DOI
10.1016/j.jpcs.2015.07.005
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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