Effect of solvent on dye-adsorption process and photovoltaic properties of dendritic organic dye on TiO2 electrode of dye-sensitized solar cells
- Authors
- Jeon, Byeong Cheol; Kim, Myeong Seok; Cho, Min Ju; Choi, Dong Hoon; Ahn, Kwang-Soon; Kim, Jae Hong
- Issue Date
- 2월-2014
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Dye-sensitized solar cells; Dendritic organic dyes; Adsorption mechanism; Solvent effect; Photovoltaic property
- Citation
- SYNTHETIC METALS, v.188, pp.130 - 135
- Indexed
- SCIE
SCOPUS
- Journal Title
- SYNTHETIC METALS
- Volume
- 188
- Start Page
- 130
- End Page
- 135
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/99412
- DOI
- 10.1016/j.synthmet.2013.12.006
- ISSN
- 0379-6779
- Abstract
- Correlation between the photovoltaic activity and adsorption characteristics of a TiO2 electrode coated with an organo-dendritic dye containing three chromophores in one molecule ((2E,2'E,2"E)-3,3',3"-(10,10',10"-(6,6',6"-(4,4',4"-(ethane-1,1,1-triyl)tris(benzene-4,1-diyl))tris (oxy)tris(hexane-6,1-diyl))tris(10H-phenothiazine-10,3-diyl)tris(2-cyanoacrylic acid), triple-PTZ) was investigated by applying it in dye-sensitized solar cells (DSSCs). The photovoltaic performance of the DSSCs utilizing the Triple-PTZ dyes varied based on the solvent conditions employed for adsorbing the dye on the TiO2 electrode surface. Aggregation of the Triple-PTZ dyes on the electrode surface was induced in the poor solvent system, with a consequent increase in the total amount of Triple-PTZ dye, which is directly adsorbed on the TiO2 surface. However, incomplete tethering of the Triple-PTZ dye molecules onto the TiO2 surface substantially reduced the short-circuit current (J(sc)). A good solvent promoted uniform adsorption of the Triple-PTZ dye on the TiO2 surface, with a consequent enhancement of the power conversion efficiency (PCE) of the fabricated DSSCs up to 4.90%, which is much higher than the PCE of 1.93% obtained from the DSSC fabricated using the poor solvent system. The correlation between the adsorption properties of the photosensitizing Triple-PTZ dyes on the TiO2 electrode and the photovoltaic performance was intensively investigated with the help of ATR-FT-IR spectroscopy, the incident photon-to-electron conversion efficiency (IPCE), and electrochemical impedance spectroscopy (EIS) analysis. (C) 2013 Elsevier B.V. All rights reserved.
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