Coumarin dyes containing low-band-gap chromophores for dye-sensitised solar cells
- Authors
- Seo, Kang Deuk; Song, Hae Min; Lee, Myung Jun; Pastore, Mariachiara; Anselmi, Chiara; De Angelis, Filippo; Nazeeruddin, Mohammad K.; Graeetzel, Michael; Kim, Hwan Kyu
- Issue Date
- 9월-2011
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Coumarin; Dye-sensitised solar cell; Low-band-gap chromophore; Ethylenedioxythiophene; Molecular orbitals
- Citation
- DYES AND PIGMENTS, v.90, no.3, pp.304 - 310
- Indexed
- SCIE
SCOPUS
- Journal Title
- DYES AND PIGMENTS
- Volume
- 90
- Number
- 3
- Start Page
- 304
- End Page
- 310
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/111639
- DOI
- 10.1016/j.dyepig.2011.01.009
- ISSN
- 0143-7208
- Abstract
- A series of coumarin dyes containing a low-band-gap chromophore of ethylenedioxythiophene (EDOT), which comprises a coumarin moiety as the electron donor and a cyanoacrylic acid moiety as electron acceptor in D-pi-A chromophores, were developed for use in dye-sensitised solar cells (DSSCs). These coumarin dyes have been used to fabricate DSSCs using I-/I-3(-) liquid electrolytes and their device performances were compared with that of NKX-2677 as a standard dye. Even though HKK-CM2 and HKK-CM3 have more extended aromatic units than HKK-CM1, the degree of pi-conjugation in HKK-CM2 and HKK-CM3 is less efficient than that of HKK-CM1, due to the relatively larger torsion angle between the plane of the donor and that of the acceptor. It is also in a good agreement with Density Functional Theory (DFT) calculations. As a result, a solar cell based on HKK-CM1 sensitiser shows better photovoltaic performance with J(SC) 0114.2 mA cm(-2), V-OC of 0.60 V, and a fill factor of 0.70, corresponding to an overall conversion efficiency eta of 6.07% under the standard AM 1.5 irradiation, than HKK-CM2 and HKK-CM3-based solar cells. (C) 2011 Elsevier Ltd. All rights reserved.
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Collections - Graduate School > Department of Material Chemistry > 1. Journal Articles
- Graduate School > Department of Advanced Materials Chemistry > 1. Journal Articles
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