Wavelength Conversion Lanthanide(III)-cored Complex for Highly Efficient Dye-sensitized Solar Cells
- Authors
- Oh, Jung Hwan; Song, Hae Min; Eom, Yu Kyung; Ryu, Jung Ho; Ju, Myung Jong; Kim, Hwan Kyu
- Issue Date
- 20-8월-2011
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- Europium(III)-cored complex; Wavelength conversion material; Energy transfer; UV light harvesting; Dye-sensitized solar cells
- Citation
- BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.32, no.8, pp.2743 - 2750
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- BULLETIN OF THE KOREAN CHEMICAL SOCIETY
- Volume
- 32
- Number
- 8
- Start Page
- 2743
- End Page
- 2750
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/111770
- DOI
- 10.5012/bkcs.2011.32.8.2743
- ISSN
- 0253-2964
- Abstract
- Lanthanide(III)-cored complex as a wavelength conversion material has been successfully designed and synthesized for highly efficient dye-sensitized solar cells, for the first time, since light with a short wavelength has not been effectively used for generating electric power owing to the limited absorption of these DSSCs in the UV region. A black dye (BD) was chosen and used as a sensitizer, because BD has a relatively weak light absorption at shorter wavelengths. The overall conversion efficiency of the BD/WCM device was remarkably increased, even with the relatively small amount of WCM added to the device. The enhancement in V-oc by WCM, like DCA, could be correlated with the suppression of electron recombination between the injected electrons and I-3(-) ions. Furthermore, the short-circuit current density was significantly increased by WCM with a strong UV light-harvesting effect. The energy transfer from the Eu(III)-cored complex to the TiO2 film occurred via the dye, so the number of electrons injected into the TiO2 surface increased, i.e., the short-circuit current density was increased. As a result, BD/WCM-sensitized solar cells exhibit superior device performance with the enhanced conversion efficiency by a factor of 1.22 under AM 1.5 sunlight: The photovoltaic performance of the BD/WCM-based DSSC exhibited remarkably high values, J(sc) of 17.72 mA/cm(2), V-oc of 720 mV, and a conversion efficiency of 9.28% at 100 mW cm(-2), compared to a standard DSSC with J(sc) of 15.53 mA/cm(2), V-oc of 689 mV, and a conversion efficiency of 7.58% at 100 mW cm(-2). Therefore, the Eu(III)-cored complex is a promising candidate as a new wavelength conversion coadsorbent for highly efficient dye-sensitized solar cells to improve UV light harvesting through energy transfer processes. The abstract should be a single paragraph which summaries the content of the article
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